How to Change Brightness of Image?

How to Change Brightness of Image? - java

i have made an application that loads image from specific directory, loads all images in stack, when i am clicking on next button next image loads.
i have also added JSlider that change Brightness of Loaded Image but it doesn't work.
i don't know why but i am not getting exact problem.
my code :
public class PictureEditor extends JFrame
{
private static final long serialVersionUID = 6676383931562999417L;
String[] validpicturetypes = {"png", "jpg", "jpeg", "gif"};
Stack<File> pictures ;
JLabel label = new JLabel();
BufferedImage a = null;
float fval=1;
public PictureEditor()
{
JPanel panel = new JPanel();
JMenuBar menubar = new JMenuBar();
JMenu toolsmenu = new JMenu("Tools");
final JSlider slider1;
slider1 = new JSlider(JSlider.HORIZONTAL,0,4,1);
slider1.setToolTipText("Slide To Change Brightness");
slider1.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
slider1.setMajorTickSpacing(1);
slider1.setPaintLabels(true);
slider1.setPaintTicks(true);
slider1.setPaintTrack(true);
slider1.setAutoscrolls(true);
slider1.setBounds(50, 55, 200, 50);
slider1.addChangeListener(new ChangeListener()
{
#Override
public void stateChanged(ChangeEvent e)
{
System.out.println("Before");
fval=slider1.getValue();
chgBrt(fval);
repaint();
}
});
TitledBorder title;
title = BorderFactory.createTitledBorder("Operations");
title.setTitleJustification(TitledBorder.LEFT);
JButton RT90 = new JButton("");
JButton RT180 = new JButton("");
JButton RTM90 = new JButton("");
JButton RTM180 = new JButton("");
JButton NEXT = new JButton("");
Image img = null;
Image imgn = null;
try
{
img = ImageIO.read(getClass().getResource("/images/images_Horizontal.png"));
imgn = ImageIO.read(getClass().getResource("/images/next12.png"));
}
catch (IOException e)
{
e.printStackTrace();
}
RT90.setIcon(new ImageIcon(img));
RT180.setIcon(new ImageIcon(img));
RTM90.setIcon(new ImageIcon(img));
RTM180.setIcon(new ImageIcon(img));
NEXT.setIcon(new ImageIcon(imgn));
JPanel buttonPane = new JPanel();
buttonPane.add(slider1);
buttonPane.add(Box.createRigidArea(new Dimension(250,0)));
buttonPane.setBorder(title);
buttonPane.add(RT90);
buttonPane.add(RT180);
buttonPane.add(RTM90);
buttonPane.add(RTM180);
buttonPane.add(Box.createRigidArea(new Dimension(250,0)));
NEXT.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0)
{
nextImage();
}
});
buttonPane.add(NEXT);
getContentPane().add(buttonPane, BorderLayout.SOUTH);
final File dir = new File("");
final JFileChooser file;
file = new JFileChooser();
file.setCurrentDirectory(dir);
file.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
file.showOpenDialog(panel);
String path = file.getSelectedFile().getAbsolutePath();
System.out.println(path);
pictures= getFilesInFolder(path.toString());
Action nextpictureaction = new AbstractAction("Next Picture")
{
private static final long serialVersionUID = 2421742449531785343L;
#Override
public void actionPerformed(ActionEvent e)
{
nextImage();
}
};
setJMenuBar(menubar);
menubar.add(toolsmenu);
toolsmenu.add(nextpictureaction);
panel.add(label,BorderLayout.CENTER);
add(panel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationByPlatform(true);
setSize(1000, 700);
setTitle("PictureEditor");
setVisible(true);
}
public Stack<File> getFilesInFolder(String startPath)
{
File startFolder = new File(startPath);
Stack<File> picturestack = new Stack<File>();
String extension;
int dotindex;
// Go through the folder
for (File file : startFolder.listFiles())
{
extension = "";
dotindex = file.getName().lastIndexOf('.'); // Get the index of the dot in the filename
if (dotindex > 0)
{
extension = file.getName().substring(dotindex + 1);
// Iterate all valid file types and check it
for (String filetype : validpicturetypes)
{
if (extension.equals(filetype))
{
picturestack.add(file);
}
}
}
}
return picturestack;
}
public void nextImage()
{
try
{
a=ImageIO.read(pictures.pop().getAbsoluteFile());
}
catch (IOException e1)
{
e1.printStackTrace();
}
final ImageIcon image = new ImageIcon(a);
label.setIcon(image);
repaint();
}
#SuppressWarnings("null")
public void chgBrt(float f)
{
Graphics g = null;
Graphics2D g2d=(Graphics2D)g;
try
{
BufferedImage dest=changeBrightness(a,(float)fval);
System.out.println("Change Bright");
int w = a.getWidth();
int h = a.getHeight();
g2d.drawImage(dest,w,h,this);
ImageIO.write(dest,"jpeg",new File("/images/dest.jpg"));
System.out.println("Image Write");
}
catch(Exception e)
{
e.printStackTrace();
}
}
public BufferedImage changeBrightness(BufferedImage src,float val)
{
RescaleOp brighterOp = new RescaleOp(val, 0, null);
return brighterOp.filter(src,null); //filtering
}
public static void main(String[] args)
{
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new PictureEditor();
}
});
}
}
anyone who can guide me and tell me where i am wrong ??

You may be able to adapt the approach shown in this RescaleTest, which varies the scaleFactor passed to RescaleOp to a value between zero and twice the slider's maximum.

Related

Why Won't the Java Component JPanel won't disapear?

I was trying to set up something with the JMenu where you can switch between "pages" (JPanels) but I ran into an issue where one would not disappear after trying a few methods online. What is the error I am making?
code:
public class Window {
public static boolean NewTerrainCamPos = false;
public static String textVal;
public static String textVal2;
public static String resiveTex;
public static String resiveTex2;
public static final int Width = 1000;
public static final int Height = 720;
public static final int FPS_CAP = 120;
private static long lastFrameTime;
private static float delta;
public void createDisplay(){
ContextAttribs attribs = new ContextAttribs(3,2).withForwardCompatible(true).withProfileCore(true);
try {
Canvas openglSurface = new Canvas();
JFrame frame = new JFrame();
JPanel game = new JPanel();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
//..............Menu Bar...............
JMenuBar menuBar = new JMenuBar();
JMenu terrain = new JMenu("Terrain");
JMenu Home = new JMenu("Home");
menuBar.add(Home);
menuBar.add(terrain);
JMenuItem newTerrain = new JMenuItem("add Terrain");
JMenuItem editTerrain = new JMenuItem("Edit Terrain");
JMenuItem editTexture = new JMenuItem("Edit Texture");
terrain.add(newTerrain);
terrain.add(editTerrain);
terrain.add(editTexture);
frame.setJMenuBar(menuBar);
//......................................................
newTerrain.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
NewTerrainCamPos = true;
JFrame frame2 = new JFrame();
frame2.setVisible(true);
frame2.setSize(300, 300);
//...............................
GridLayout experimentLayout = new GridLayout(3,2);
frame2.setLayout(experimentLayout);
//.....................................
JLabel xCord = new JLabel("XCoords: ");
JLabel zCord = new JLabel("ZCoords: ");
JTextField text = new JTextField();
JTextField text2 = new JTextField();
resiveTex2 = text2.getText();
text.getDocument().addDocumentListener(new DocumentListener() {
#Override
public void insertUpdate(DocumentEvent de) {
resiveTex = text.getText();
}
#Override
public void removeUpdate(DocumentEvent de) {
resiveTex = text.getText();
}
#Override
public void changedUpdate(DocumentEvent de) {
//plain text components don't fire these events
}
});
text2.getDocument().addDocumentListener(new DocumentListener() {
#Override
public void insertUpdate(DocumentEvent de) {
resiveTex2 = text2.getText();
}
#Override
public void removeUpdate(DocumentEvent de) {
resiveTex2 = text2.getText();
}
#Override
public void changedUpdate(DocumentEvent de) {
//plain text components don't fire these events
}
});
JButton createTerrain = new JButton("CreateTerrain");
createTerrain.addActionListener(new ActionListener(){
TIDF terrainFileID;
public void actionPerformed(ActionEvent a){
NewTerrainCamPos = false;
textVal = text.getText();
textVal2 = text2.getText();
TIDF load = new TIDF();
load.terrainIDFile();
}
});
frame2.add(xCord);
frame2.add(text);
frame2.add(zCord);
frame2.add(text2);
frame2.add(createTerrain);
}
});
editTerrain.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JFrame frame3 = new JFrame();
frame3.setVisible(true);
frame3.setSize(300, 300);
//......................................
GridLayout experimentLayout = new GridLayout(3,2);
frame3.setLayout(experimentLayout);
//......................................
JButton select = new JButton("Select");
String terrainLocList[] =
{
"Item 1",
"Item 2",
"Item 3",
"Item 4"
};
JList list = new JList(terrainLocList);
list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
list.setVisibleRowCount(-1);
frame3.add(list);
frame3.add(select);
}
});
editTexture.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg0) {
frame.remove(MainPage());
frame.add(TextureEditor());
frame.revalidate();
}
});
//.........................................
frame.add(MainPage());
frame.add(game);
frame.setSize(1200, 1200);
frame.setVisible(true);
game.add(openglSurface);
game.setBounds(0, 266, 1000, 720);
openglSurface.setSize(1000, 720);
Display.setParent(openglSurface);
Display.setDisplayMode(new DisplayMode(Width, Height));
Display.create(new PixelFormat(), attribs);
frame.setTitle("Game editor 0.3");
} catch (LWJGLException e) {
e.printStackTrace();
}
GL11.glViewport(0, 0, Width, Height);
lastFrameTime = getCurrentTime();
}
public Component MainPage(){
JPanel Main = new JPanel();
Main.setBounds(400, 0, 500, 200);
Label Welcome = new Label("Welcome to: Game Editor Version 0.3");
Welcome.setFont(new Font("Monotype Corsiva",10,22));
Main.add(Welcome);
return Main;
}
public Component TextureEditor(){
JPanel TextureLayoutLook = new JPanel();
TextureLayoutLook.setBounds(60, 0, 200, 200);
Label editorVersion = new Label("Terrain Texture Editor: 0.1");
TextureLayoutLook.add(editorVersion);
return TextureLayoutLook;
}
public static boolean Returnboolean(){
return NewTerrainCamPos;
}
public static String getTex1() {
return textVal;
}
public static String getTex2(){
return textVal2;
}
public static String getTexupdate(){
return resiveTex;
}
public static String getTexupdate2(){
return resiveTex2;
}
public static void updateDisplay(){
Display.sync(FPS_CAP);
Display.update();
long currentFrameTime = getCurrentTime();
delta = (currentFrameTime - lastFrameTime)/1000f;
lastFrameTime = currentFrameTime;
}
public static float getFrameTimeSeconds(){
return delta;
}
public static void closeDisplay(){
Display.destroy();
}
private static long getCurrentTime(){
return Sys.getTime()*1000/Sys.getTimerResolution();
}
}

frame.add(MainPage());
This line builds a brand new "main page" JPanel, and adds it the the JFrame.
frame.remove(MainPage());
This line of code creates a brand new "main page" JPanel, which has never been added to the JFrame, and attempts to remove it.
This new panel can't be removed, because it was never added. You need to retain a reference to the original panel, and remove that.
JPanel main_page = MainPage();
frame.add(main_page);
//...
frame.remove(main_page);
Note: This main_page could be re-added at a future time without needing to recreate it. Just call frame.add(main_page); again. But really, you want to use the card layout manager.

Why Windows doesn't show the same output for ImageIcon on JButton as Ubuntu?

I am trying to make an image gallery just like in the following image but Windows shows images' unnecessary background whereas in Ubuntu it shows correctly.
I use the following code...
public class CommonGalleryPanel extends JPanel implements ActionListener {
public static boolean isGallaryAllowed = false;
private int counter = 0;
private InputStream binaryStream;
private BufferedImage img;
private ImageIcon iconImg;
private JButton[] btns;
private JCheckBox[] checkBox;
private JButton nextButton;
private JButton prevButton;
private ResultSet rs;
private String imageID;
private long lastRecordWas;
private long selectedOrnamentType;
private JPanel[] panels;
private JButton okButton;
private JPanel centerPanel;
private JPanel eastPanel;
private JPanel northPanel;
private JPanel southPanel;
private JComboBox<String> itemsCombo;
private String[] itemsList;
private JButton load;
private JPanel westPanel;
private int rsLen = 0;
private int noOfRows;
private BufferedImage nextButtonImage;
private BufferedImage prevButtonImage;
private static List<Long> listOfSelectedOrnaments;
private Administrator admin;
public static List<Long> getListOfSelectedOrnaments() {
return listOfSelectedOrnaments;
}
public static void setListOfSelectedOrnaments(
List<Long> listOfSelectedOrnaments) {
CommonGalleryPanel.listOfSelectedOrnaments = listOfSelectedOrnaments;
}
public CommonGalleryPanel(Administrator admin) {
this.admin = admin;
try {
setLayout(new BorderLayout());
centerPanel = new JPanel(new FlowLayout());
eastPanel = new JPanel(new GridLayout());
westPanel = new JPanel(new GridLayout());
northPanel = new JPanel(new GridBagLayout());
southPanel = new JPanel(new GridBagLayout());
listOfSelectedOrnaments = new ArrayList<Long>();
itemsList = DatabaseHandler.getOrnamentTypesInString();
itemsCombo = new JComboBox<String>(itemsList);
load = new JButton("Load");
load.addActionListener(this);
load.setActionCommand("loadButton");
northPanel.setBackground(Color.LIGHT_GRAY);
eastPanel.setBackground(Color.LIGHT_GRAY);
westPanel.setBackground(Color.LIGHT_GRAY);
southPanel.setBackground(Color.LIGHT_GRAY);
centerPanel.setBackground(Color.GRAY);
northPanel.add(itemsCombo);
northPanel.add(new JLabel(" "));
northPanel.add(load);
northPanel.add(Box.createRigidArea(new Dimension(0, 50)));
add(northPanel, BorderLayout.NORTH);
try {
nextButtonImage = Utility
.getMyResource("/buttons/next-btn.png");
prevButtonImage = Utility.getMyResource("/buttons/pre-btn.png");
} catch (Exception ex) {
ex.printStackTrace();
}
prevButton = new JButton(new ImageIcon(
prevButtonImage.getScaledInstance(40, 100,
BufferedImage.SCALE_AREA_AVERAGING)));
prevButton.setSize(getMaximumSize());
westPanel.add(prevButton);
add(eastPanel, BorderLayout.EAST);
nextButton = new JButton(new ImageIcon(
nextButtonImage.getScaledInstance(40, 100,
BufferedImage.SCALE_AREA_AVERAGING)));
eastPanel.add(nextButton);
add(westPanel, BorderLayout.WEST);
okButton = new JButton("Demonstrate");
southPanel.add(Box.createRigidArea(new Dimension(0, 50)));
southPanel.add(okButton);
add(southPanel, BorderLayout.SOUTH);
add(centerPanel, BorderLayout.CENTER);
repaint();
revalidate();
setVisible(true);
nextButton.addActionListener(this);
okButton.addActionListener(this);
prevButton.addActionListener(this);
nextButton.setActionCommand("nextButton");
okButton.setActionCommand("okButton");
prevButton.setActionCommand("prevButton");
revalidate();
repaint();
setVisible(true);
} catch (Exception backException) {
backException.printStackTrace();
}
}
public void getImages(ResultSet rs) {
try {
rsLen = 0;
while (rs.next()) {
counter++;
rsLen++;
}
if (itemsCombo.getSelectedItem().toString().equals("EARING")) {
noOfRows = DatabaseHandler
.getRowCountOfGivenSubOrnamentType(selectedOrnamentType);
} else {
noOfRows = DatabaseHandler
.getRowCountOfGivenOrnamentType(selectedOrnamentType);
}
checkBox = new JCheckBox[noOfRows + 1];
List<String> listOfImageIds = new ArrayList<String>(counter);
rs.beforeFirst();
while (rs.next()) {
listOfImageIds.add(rs.getString(1));
}
rs.beforeFirst();
int i = 0;
centerPanel.removeAll();
btns = new JButton[10];
panels = new JPanel[10];
while (rs.next()) {
if (itemsCombo.getSelectedItem().toString().equals("EARING")) {
binaryStream = rs.getBinaryStream(2);
} else {
binaryStream = rs.getBinaryStream(2);
}
img = ImageIO.read(binaryStream);
iconImg = new ImageIcon(img.getScaledInstance(290, 180,
BufferedImage.TYPE_INT_ARGB));
btns[i] = new JButton(iconImg);
checkBox[i] = new JCheckBox();
checkBox[i].setActionCommand(String.valueOf(rs.getLong(1)));
panels[i] = new JPanel();
btns[i].setBorderPainted(false);
btns[i].setActionCommand(String.valueOf(rs.getLong(1)));
btns[i].setBackground(new Color(0, 0, 0, 0));
btns[i].addActionListener(this);
//btns[i].setOpaque(true);
panels[i].add(btns[i]);
panels[i].add(checkBox[i]);
panels[i].setBackground(Color.LIGHT_GRAY);
centerPanel.add(panels[i]);
lastRecordWas = rs.getLong(1);
System.out.println("lastRecordWas = " + lastRecordWas);
i++;
}
for (int j = 0; j < i; j++) {
final int k = j;
checkBox[j].addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
if (checkBox[k].isSelected()) {
System.out.println("Selected image..."
+ checkBox[k].getActionCommand());
listOfSelectedOrnaments.add(Long
.parseLong(checkBox[k].getActionCommand()));
} else {
System.out.println("Deselected image..."
+ checkBox[k].getActionCommand());
listOfSelectedOrnaments.remove(Long
.parseLong(checkBox[k].getActionCommand()));
}
System.out.println("Selected items list = "
+ listOfSelectedOrnaments);
}
});
}
System.out.println("counter = " + counter);
if (rsLen == 0) {
centerPanel.add(new JLabel("No more images available...."),
BorderLayout.CENTER);
repaint();
revalidate();
}
} catch (SQLException | IOException ex) {
ex.printStackTrace();
}
add(centerPanel, BorderLayout.CENTER);
repaint();
revalidate();
setVisible(true);
}
public String getImageID() {
return imageID;
}
public void setImageID(String imageID) {
this.imageID = imageID;
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("nextButton")) {
System.out.println("next button clicked...");
rs = DatabaseHandler.getNext9ItemsByType(lastRecordWas,
selectedOrnamentType);
getImages(rs);
revalidate();
repaint();
} else if (e.getActionCommand().equals("prevButton")) {
System.out.println("prev button clicked...");
rs = DatabaseHandler.getPrev9ItemsByType(lastRecordWas,
selectedOrnamentType);
getImages(rs);
revalidate();
repaint();
} else if (e.getActionCommand().equals("okButton")) {
try {
if (listOfSelectedOrnaments.isEmpty()) {
JOptionPane
.showMessageDialog(null,
"Please Select at least any one ornament to demonstrate...");
} else {
this.admin.setListOfSelectedOrnaments(
listOfSelectedOrnaments, selectedOrnamentType);
System.out.println("list is setteled with Selected images "
+ listOfSelectedOrnaments);
this.setVisible(false);
}
} catch (Exception ee) {
ee.printStackTrace();
}
} else if (e.getActionCommand().equals("loadButton")) {
try {
this.selectedOrnamentType = DatabaseHandler
.getOrnamentIdFromOrnamentName(itemsCombo
.getSelectedItem().toString());
if (itemsCombo.getSelectedItem().toString().equals("EARING")) {
rs = DatabaseHandler.getNext9EaringsByType(0l,
this.selectedOrnamentType);
} else {
rs = DatabaseHandler.getNext9ItemsByType(0l,
this.selectedOrnamentType);
}
getImages(rs);
} catch (Exception ex) {
ex.printStackTrace();
}
} else {
try {
System.out.println("Selected image = " + e.getActionCommand());
ImageViewer.showImage(Long.parseLong(e.getActionCommand()),itemsCombo.getSelectedItem().toString());
setImageID(e.getActionCommand());
} catch (Exception ee) {
ee.printStackTrace();
}
}
}
}
Basically it works well with Ubuntu then why not on Windows ?

Just a suggestion:
put this lines first in your Main-Method:
public static void main(String[] args)
{
String propertyName = "sun.java2d.noddraw";
System.setProperty(propertyName, "true");
propertyName = "sun.java2d.d3d";
System.setProperty(propertyName, "false");
//YOUR CODE HERE...
}
By doing this, you will TURN OFF usage of direct3D and directDraw.
You can also try to use a different LookAndFeel: (here as example MetalLookAndFeel)
public static void main(String[] args)
{
String propertyName = "sun.java2d.noddraw";
System.setProperty(propertyName, "true");
propertyName = "sun.java2d.d3d";
System.setProperty(propertyName, "false");
try
{
javax.swing.UIManager.setLookAndFeel(MetalLookAndFeel.class.getName());
}
catch (Exception ex)
{
ex.printStackTrace();
}
//YOUR CODE HERE...
}
By default, SystemLookAndFeel will return "WindowsLookAndFeel" (when using Windows)
but on Linux it will return MetalLookAndFeel (or GTKLookAndFeel).
To force Windows to use MetalLookAndFeel (instead of SystemLookAndFeel (which is WindowsLookAndFeel)), you have to use the code above!

listen for key event while swing main thread is running

I have a swing application which takes user input and goes to full screen and displays variations of input image, I want to stop this thread execution on particular key press (prig should not terminate) and program should ask for the another user input. don't know how to approach? plz help here's code:::
public class ImageProcessor extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 2916361361443483318L;
private JFileChooser fc = null;
private JMenuItem item1, item2;
private BufferedImage image = null;
private JFrame frame = null;
private JPanel panel = null;
private int width = 0;
private int height = 0;
private BorderLayout card;
private Container contentPane;
private int wcount = 0;
private int hcount = 0;
public ImageProcessor() {
frame = new JFrame("Image Processor");
contentPane = frame.getContentPane();
panel = new JPanel();
card = new BorderLayout();
panel.setLayout(card);
panel.setBackground(Color.white);
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Menu");
menu.setMnemonic(KeyEvent.VK_M);
menuBar.add(menu);
item1 = new JMenuItem("Browse an image");
item2 = new JMenuItem("Exit");
item1.addActionListener(this);
item2.addActionListener(this);
menu.add(item1);
menu.add(item2);
frame.setJMenuBar(menuBar);
contentPane.add(panel);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new ImageProcessor();
}
});
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == item1) {
if (fc == null)
fc = new JFileChooser();
int retVal = fc.showOpenDialog(null);
if (retVal == JFileChooser.APPROVE_OPTION){
File file = fc.getSelectedFile();
try {
image = ImageIO.read(file);
width = image.getWidth();
height = image.getHeight();
final GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
frame.getJMenuBar().setVisible(false);
gd.setFullScreenWindow(frame);
Timer timer = new Timer(0, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
panel.removeAll();
//System.out.println(wcount + " " + hcount);
if(wcount <= width-1 && hcount <= height-1){
Color c = new Color(image.getRGB(wcount, hcount));
panel.setBackground(c);
panel.revalidate();
panel.repaint();
}
((Timer)e.getSource()).setDelay(333);
if(wcount <= width-1){
if(hcount < height-1 )
hcount++;
else{
hcount = 0;
wcount++;
}
}else{
//((Timer)e.getSource()).stop();
//gd.setFullScreenWindow(null);
//frame.getJMenuBar().setVisible(true);
//JOptionPane.showMessageDialog(null, "Image Read Complete!");
wcount = 0;
hcount = 0;
}
}
});
timer.start();
} catch (IOException e1) {
System.out.println("IO::" + e1.getMessage());
} catch (Exception e1) {
System.out.println("Exception::" + e1.getMessage());
}
}
}
if (e.getSource() == item2) {
System.exit(0);
}
}
}
plz advice..

Java Messenger Socket

I am attempting to make a "messenger"(just for learning really) and am pretty new to Socket/ServerSocket and am currently stuck in making the networking part.
Also, I do know that the ClientNetworking isn't complete. I have tried to finish it but I am stumped.
ServerMain:
public class ServerMain extends JFrame {
int WIDTH = 480;
int HEIGHT = 320;
String writeToConsole;
JPanel mainPanel, userPanel, consolePanel;
JTabbedPane tabbedPane;
JButton launchButton;
JTextArea console;
JTextField consoleInput;
JScrollPane consoleScroll;
public ServerMain() {
super("Messenger Server");
mainPanel = new JPanel();
mainPanel.setLayout(null);
Networking();
createConsolePanel();
userPanel = new JPanel();
userPanel.setLayout(null);
tabbedPane = new JTabbedPane();
tabbedPane.add(mainPanel, "Main");
tabbedPane.add(userPanel, "Users");
tabbedPane.add(consolePanel, "Console");
add(tabbedPane);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(UnsupportedLookAndFeelException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
ServerMain frame = new ServerMain();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(frame.WIDTH, frame.HEIGHT);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
}
public void Networking() {
ServerNetworking net;
try {
net = new ServerNetworking();
net.start();
} catch(Exception e) {
e.printStackTrace();
}
}
public void createConsolePanel() {
consolePanel = new JPanel();
consolePanel.setLayout(null);
console = new JTextArea();
console.setFont(new Font("", Font.PLAIN, 13 + 1/2));
console.setBounds(0, 0, WIDTH, HEIGHT - 100);
console.setEditable(false);
console.setLineWrap(true);
consoleInput = new JTextField(20);
consoleInput.setBounds(0, 0, WIDTH, 25);
consoleInput.setLocation(0, 240);
consoleInput.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event) {
String input = consoleInput.getText();
if(input.equalsIgnoreCase("/sendmessage")) {
//console.append(input);
console.append("Input who you would like to send the message to:");
consoleInput.setText("");
} if (input.equalsIgnoreCase("/ban")) {
console.append("Who you would like to ban");
consoleInput.setText("");
}
}
});
consolePanel.add(console);
consolePanel.add(consoleInput);
}
public void consoleWrite(String write) {
console.append(write);
}
}
ServerNetworking(Thread):
public class ServerNetworking extends Thread {
private static ServerSocket servSock;
private static final int PORT = 1234;
private static void handleClient() {
Socket link = null;
try {
link = servSock.accept();
Scanner input = new Scanner(link.getInputStream());
PrintWriter output =
new PrintWriter(link.getOutputStream(),true);
int numMessages = 0;
String message = input.nextLine();
while (!message.equals("***CLOSE***")) {
System.out.println("Message received.");
numMessages++;
output.println("Message " +
numMessages + ": " + message);
message = input.nextLine();
}
output.println(numMessages + " messages received.");
} catch(IOException ioEx) {
ioEx.printStackTrace();
} finally {
try {
System.out.println( "\n* Closing connection... *");
link.close();
} catch(IOException ioEx) {
System.out.println("Unable to disconnect!");
System.exit(1);
}
}
}
public void run() {
System.out.println("Opening port...\n");
try {
servSock = new ServerSocket(PORT);
} catch(IOException ioEx) {
System.out.println("Unable to attach to port!");
System.exit(1);
} do {
handleClient();
} while (true);
}
}
ClientMain:
public class ClientMain extends JFrame {
int WIDTH = 640;
int HEIGHT = 480;
JTabbedPane tabbedPane;
JMenuBar topMenuBar;
JMenu userMenu, helpMenu, settingsMenu;
JRadioButtonMenuItem menuItem;
JPanel mainPanel, friendsPanel, groupsPanel, testPanel;
JLabel title;
JScrollPane consoleScrollPane;
JSplitPane friendsPane;
JTextArea messageArea, testArea;
JTextField testField;
Box box;
public ClientMain() {
super("Messenger Client");
Networking();
title = new JLabel("Client!");
title.setFont(new Font("Impact", Font.PLAIN, 32));
mainPanel = new JPanel();
mainPanel.setLayout(null);
mainPanel.add(title);
groupsPanel = new JPanel();
groupsPanel.setLayout(null);
friendsPanel = new JPanel();
friendsPanel.setLayout(null);
testPanel = new JPanel();
testPanel.setLayout(null);
testArea = new JTextArea();
testArea.setFont(new Font("", Font.PLAIN, 13 + 1/2));
testArea.setBounds(0, 0, WIDTH, HEIGHT - 100);
testArea.setEditable(false);
testArea.setLineWrap(true);
testField = new JTextField(20);
testField.setBounds(0, 380, 640, 25);
//testField.setLocation(0, HEIGHT - 50);
testField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ClientNet net = new ClientNet();
String input = null;
input = testField.getText();
testArea.append(input);
testField.setText("");
if(input.equalsIgnoreCase("/sendmessage")) {
testArea.append("\n Input who you would like to send the message to:");
input = null;
if(input.equalsIgnoreCase("Hello")) {
net.userEntry = input;
}
}
}
});
testPanel.add(testArea);
testPanel.add(testField);
tabbedPane = new JTabbedPane();
tabbedPane.add(mainPanel, "Main");
tabbedPane.add(friendsPanel, "Friends");
tabbedPane.add(groupsPanel, "Groups");
tabbedPane.add(testPanel, "Test");
topMenuBar = new JMenuBar();
userMenu = new JMenu("User");
settingsMenu = new JMenu("Settings");
helpMenu = new JMenu("Help");
menuItem = new JRadioButtonMenuItem("Something here");
userMenu.add(menuItem);
topMenuBar.add(userMenu, "User");
topMenuBar.add(settingsMenu, "Settings");
topMenuBar.add(helpMenu, "Help");
add(topMenuBar);
add(tabbedPane);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(UnsupportedLookAndFeelException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
ClientMain frame = new ClientMain();
Insets insets = frame.getInsets();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(frame.WIDTH, frame.HEIGHT);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
frame.setJMenuBar(frame.topMenuBar);
}
public void Networking() {
ClientNet net;
try {
net = new ClientNet();
net.start();
} catch(Exception e) {
e.printStackTrace();
}
}
public void createMenuBar() {
topMenuBar = new JMenuBar();
userMenu = new JMenu("User");
settingsMenu = new JMenu("Settings");
helpMenu = new JMenu("Help");
menuItem = new JRadioButtonMenuItem("MenuItem");
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
topMenuBar.add(userMenu, "User");
topMenuBar.add(settingsMenu, "Settings");
topMenuBar.add(helpMenu, "Help");
}
public void getFriends(String username) {
}
}
ClientNetworking(Thread):
public class ClientMain extends JFrame {
int WIDTH = 640;
int HEIGHT = 480;
JTabbedPane tabbedPane;
JMenuBar topMenuBar;
JMenu userMenu, helpMenu, settingsMenu;
JRadioButtonMenuItem menuItem;
JPanel mainPanel, friendsPanel, groupsPanel, testPanel;
JLabel title;
JScrollPane consoleScrollPane;
JSplitPane friendsPane;
JTextArea messageArea, testArea;
JTextField testField;
Box box;
public ClientMain() {
super("Messenger Client");
Networking();
title = new JLabel("Client!");
title.setFont(new Font("Impact", Font.PLAIN, 32));
mainPanel = new JPanel();
mainPanel.setLayout(null);
mainPanel.add(title);
groupsPanel = new JPanel();
groupsPanel.setLayout(null);
friendsPanel = new JPanel();
friendsPanel.setLayout(null);
testPanel = new JPanel();
testPanel.setLayout(null);
testArea = new JTextArea();
testArea.setFont(new Font("", Font.PLAIN, 13 + 1/2));
testArea.setBounds(0, 0, WIDTH, HEIGHT - 100);
testArea.setEditable(false);
testArea.setLineWrap(true);
testField = new JTextField(20);
testField.setBounds(0, 380, 640, 25);
//testField.setLocation(0, HEIGHT - 50);
testField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ClientNet net = new ClientNet();
String input = null;
input = testField.getText();
testArea.append(input);
testField.setText("");
if(input.equalsIgnoreCase("/sendmessage")) {
testArea.append("\n Input who you would like to send the message to:");
input = null;
if(input.equalsIgnoreCase("Hello")) {
net.userEntry = input;
}
}
}
});
testPanel.add(testArea);
testPanel.add(testField);
tabbedPane = new JTabbedPane();
tabbedPane.add(mainPanel, "Main");
tabbedPane.add(friendsPanel, "Friends");
tabbedPane.add(groupsPanel, "Groups");
tabbedPane.add(testPanel, "Test");
topMenuBar = new JMenuBar();
userMenu = new JMenu("User");
settingsMenu = new JMenu("Settings");
helpMenu = new JMenu("Help");
menuItem = new JRadioButtonMenuItem("Something here");
userMenu.add(menuItem);
topMenuBar.add(userMenu, "User");
topMenuBar.add(settingsMenu, "Settings");
topMenuBar.add(helpMenu, "Help");
add(topMenuBar);
add(tabbedPane);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(UnsupportedLookAndFeelException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
ClientMain frame = new ClientMain();
Insets insets = frame.getInsets();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(frame.WIDTH, frame.HEIGHT);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
frame.setJMenuBar(frame.topMenuBar);
}
public void Networking() {
ClientNet net;
try {
net = new ClientNet();
net.start();
} catch(Exception e) {
e.printStackTrace();
}
}
public void createMenuBar() {
topMenuBar = new JMenuBar();
userMenu = new JMenu("User");
settingsMenu = new JMenu("Settings");
helpMenu = new JMenu("Help");
menuItem = new JRadioButtonMenuItem("MenuItem");
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
topMenuBar.add(userMenu, "User");
topMenuBar.add(settingsMenu, "Settings");
topMenuBar.add(helpMenu, "Help");
}
public void getFriends(String username) {
}
}
This is the error I get when I launch the server, then the client:
It shouldn't be saying "Message received" cause I don't actually send a message
Opening port...
Message received.
* Closing connection... *
Exception in thread "Thread-1" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Unknown Source)
at Server.ServerNetworking.handleClient(ServerNetworking.java:29)
at Server.ServerNetworking.run(ServerNetworking.java:53)

I think the problem is the following loop in the ServerNetworking class:
while (!message.equals("***CLOSE***")) {
System.out.println("Message received.");
numMessages++;
output.println("Message " +
numMessages + ": " + message);
message = input.nextLine();
}
The problem with this code is that after recieving the complete message from the client the last line of code
message = input.nextLine();
looks for another next line from the message, but since the message has already been consumed, it throws the following exception:
NoSuchElementException - if no line was found
So before reading for the next line you need to make sure that there is next line to be read. This you can do using the
hasNextLine()
method, which will return true if there is next line otherwise false.
if(input.hasNextLine()) {
message = input.nextLine(); // read the next line
} else {
break; // exit the loop because, nothing to read left
}

Screenshot program

I'm making a screenshot program so when you press the screenshot button, a JMessageDial pops up and prompts you with your image, it the tells you to drag your mouse and make a box around the area that you want to take a screenshot of. I can't seem to find how to get the image inside the box when the user clicks okay.
So what I need help with is getting the image inside of the rectangle the user "draws" with his mouse, and store that in a variable.
Here is the specific code:
public void selectArea(final BufferedImage screen) throws Exception {
final BufferedImage screenCopy = new BufferedImage(screen.getWidth(), screen.getHeight(), screen.getType());
final JLabel screenLabel = new JLabel(new ImageIcon(screenCopy));
JScrollPane screenScroll = new JScrollPane(screenLabel);
screenScroll.setPreferredSize(new Dimension((int)(screen.getWidth()/2), (int)(screen.getHeight()/2)));
JPanel panel = new JPanel(new BorderLayout());
panel.add(screenScroll, BorderLayout.CENTER);
final JLabel selectionLabel = new JLabel("Draw a rectangle");
panel.add(selectionLabel, BorderLayout.SOUTH);
repaint(screen, screenCopy);
screenLabel.repaint();
screenLabel.addMouseMotionListener(new MouseMotionAdapter() {
#Override
public void mouseMoved(MouseEvent me) {
start = me.getPoint();
repaint(screen, screenCopy);
selectionLabel.setText("Start Point: " + start);
screenLabel.repaint();
}
#Override
public void mouseDragged(MouseEvent me) {
end = me.getPoint();
captureRect = new Rectangle(start, new Dimension(end.x-start.x, end.y-start.y));
try {
paintFinalImage(new BufferedImage((int)screenCopy.getGraphics().getClipBounds(captureRect).getWidth()+1,
(int)screenCopy.getGraphics().getClipBounds(captureRect).getHeight()+1, screen.getType()));
} catch (Exception e) {
e.printStackTrace();
}
repaint(screen, screenCopy);
screenLabel.repaint();
selectionLabel.setText("Rectangle: " + captureRect);
}
});
JOptionPane.showMessageDialog(null, panel, "Select your image", JOptionPane.OK_OPTION, new ImageIcon(""));
uploadImage(screenShot);
System.out.println("Final rectangle: " + screenCopy.getGraphics().getClipBounds(captureRect));
}
And this is the full class if you need it:
package com.screencapture;
import java.awt.*;
public class Main implements ActionListener, ItemListener, KeyListener, NativeKeyListener {
private final Image icon = Toolkit.getDefaultToolkit().getImage("./data/icon.gif");
private final TrayIcon trayIcon = new TrayIcon(icon, "Screen Snapper");
private JFrame frame;
private Rectangle captureRect;
private JComboBox<String> imageType;
private boolean hideWhenMinimized = false;
private final String API_KEY = "b84e430b4a65d16a6955358141f21a61";
private static Robot robot;
private BufferedImage screenShot;
private Point end;
private Point start;
public static void main(String[] args) throws Exception {
robot = new Robot();
new Main().start();
}
public void start() throws Exception {
GlobalScreen.getInstance().registerNativeHook();
GlobalScreen.getInstance().addNativeKeyListener(this);
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
frame = new JFrame("White power!");
frame.setPreferredSize(new Dimension(250, 250));
frame.getContentPane().setLayout(null);
frame.setIconImage(icon);
frame.addKeyListener(this);
frame.addWindowListener(new WindowListener() {
#Override
public void windowOpened(WindowEvent e) {}
#Override
public void windowClosing(WindowEvent e) {}
#Override
public void windowClosed(WindowEvent e) {}
#Override
public void windowIconified(WindowEvent e) {
if (hideWhenMinimized)
frame.setVisible(false);
}
#Override
public void windowDeiconified(WindowEvent e) {}
#Override
public void windowActivated(WindowEvent e) {}
#Override
public void windowDeactivated(WindowEvent e) {}
});
JLabel lblImageType = new JLabel("Image Format:");
lblImageType.setBounds(10, 11, 90, 14);
frame.getContentPane().add(lblImageType);
String[] imageTypes = {"PNG", "JPG"};
imageType = new JComboBox<String>(imageTypes);
imageType.setBounds(106, 8, 51, 20);
frame.getContentPane().add(imageType);
JButton btnTakeScreenShot = new JButton("ScreenShot");
btnTakeScreenShot.setBounds(24, 69, 115, 23);
frame.getContentPane().add(btnTakeScreenShot);
btnTakeScreenShot.addActionListener(this);
setTrayIcon();
frame.pack();
frame.setVisible(true);
}
public void setTrayIcon() throws AWTException {
CheckboxMenuItem startup = new CheckboxMenuItem("Run on start-up");
CheckboxMenuItem hide = new CheckboxMenuItem("Hide when minimized");
String[] popupMenuOptions = {"Open", "Exit"};
if (SystemTray.isSupported()) {
SystemTray tray = SystemTray.getSystemTray();
trayIcon.setImageAutoSize(true);
PopupMenu popupMenu = new PopupMenu();
for (String option : popupMenuOptions) {
if (option == "Exit") {
popupMenu.add(startup);
popupMenu.add(hide);
popupMenu.add(option);
} else {
popupMenu.add(option);
}
}
trayIcon.setPopupMenu(popupMenu);
popupMenu.addActionListener(this);
startup.addItemListener(this);
hide.addItemListener(this);
trayIcon.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
frame.setVisible(true);
}
});
tray.add(trayIcon);
}
}
public void selectArea(final BufferedImage screen) throws Exception {
final BufferedImage screenCopy = new BufferedImage(screen.getWidth(), screen.getHeight(), screen.getType());
final JLabel screenLabel = new JLabel(new ImageIcon(screenCopy));
JScrollPane screenScroll = new JScrollPane(screenLabel);
screenScroll.setPreferredSize(new Dimension((int)(screen.getWidth()/2), (int)(screen.getHeight()/2)));
JPanel panel = new JPanel(new BorderLayout());
panel.add(screenScroll, BorderLayout.CENTER);
final JLabel selectionLabel = new JLabel("Draw a rectangle");
panel.add(selectionLabel, BorderLayout.SOUTH);
repaint(screen, screenCopy);
screenLabel.repaint();
screenLabel.addMouseMotionListener(new MouseMotionAdapter() {
#Override
public void mouseMoved(MouseEvent me) {
start = me.getPoint();
repaint(screen, screenCopy);
selectionLabel.setText("Start Point: " + start);
screenLabel.repaint();
}
#Override
public void mouseDragged(MouseEvent me) {
end = me.getPoint();
captureRect = new Rectangle(start, new Dimension(end.x-start.x, end.y-start.y));
try {
paintFinalImage(new BufferedImage((int)screenCopy.getGraphics().getClipBounds(captureRect).getWidth()+1,
(int)screenCopy.getGraphics().getClipBounds(captureRect).getHeight()+1, screen.getType()));
} catch (Exception e) {
e.printStackTrace();
}
repaint(screen, screenCopy);
screenLabel.repaint();
selectionLabel.setText("Rectangle: " + captureRect);
}
});
JOptionPane.showMessageDialog(null, panel, "Select your image", JOptionPane.OK_OPTION, new ImageIcon(""));
uploadImage(screenShot);
System.out.println("Final rectangle: " + screenCopy.getGraphics().getClipBounds(captureRect));
}
public void paintFinalImage(BufferedImage image) throws Exception {
screenShot = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
Graphics2D g = screenShot.createGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
}
public void repaint(BufferedImage orig, BufferedImage copy) {
Graphics2D g = copy.createGraphics();
g.drawImage(orig, 0, 0, null);
if (captureRect != null) {
g.setColor(Color.BLACK);
g.draw(captureRect);
}
g.dispose();
}
public void uploadImage(BufferedImage image) throws Exception {
String IMGUR_POST_URI = "http://api.imgur.com/2/upload.xml";
String IMGUR_API_KEY = API_KEY;
String readLine = null;
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageIO.write(image, imageType.getSelectedItem().toString(), outputStream);
URL url = new URL(IMGUR_POST_URI);
String data = URLEncoder.encode("image", "UTF-8") + "=" + URLEncoder.encode(Base64.encodeBase64String(outputStream.toByteArray()).toString(), "UTF-8");
data += "&" + URLEncoder.encode("key", "UTF-8") + "=" + URLEncoder.encode(IMGUR_API_KEY, "UTF-8");
URLConnection urlConnection = url.openConnection();
urlConnection.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(urlConnection.getOutputStream());
wr.write(data);
wr.flush();
InputStream inputStream;
if (((HttpURLConnection) urlConnection).getResponseCode() == 400) {
inputStream = ((HttpURLConnection) urlConnection).getErrorStream();
} else {
inputStream = urlConnection.getInputStream();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
readLine = line;
}
wr.close();
reader.close();
} catch(Exception e){
e.printStackTrace();
}
String URL = readLine.substring(readLine.indexOf("<original>") + 10, readLine.indexOf("</original>"));
System.out.println(URL);
Toolkit.getDefaultToolkit().beep();
StringSelection stringSelection = new StringSelection(URL);
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(stringSelection, null);
}
#Override
public void actionPerformed(ActionEvent e) {
String command = e.getActionCommand();
System.out.println(command);
if (command.equalsIgnoreCase("open")) {
frame.setVisible(true);
} else if (command.equalsIgnoreCase("exit")) {
System.exit(-1);
} else if (command.equalsIgnoreCase("screenshot")) {
try {
final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
final BufferedImage screen = robot.createScreenCapture(new Rectangle(screenSize));
selectArea(screen);
} catch (Exception e1) {
e1.printStackTrace();
}
}
}
#Override
public void itemStateChanged(ItemEvent e) {
System.out.println(e.getItem() + ", " +e.getStateChange());
String itemChanged = e.getItem().toString();
if (itemChanged.equalsIgnoreCase("run on start-up")) {
//TODO
} else if (itemChanged.equalsIgnoreCase("hide when minimized")) {
if (e.getStateChange() == ItemEvent.DESELECTED) {
hideWhenMinimized = false;
} else if (e.getStateChange() == ItemEvent.SELECTED) {
hideWhenMinimized = true;
}
}
}
#Override
public void keyTyped(KeyEvent e) {
System.out.println("KeyTyped: "+e.getKeyCode());
}
#Override
public void keyPressed(KeyEvent e) {
}
#Override
public void keyReleased(KeyEvent e) {
}
#Override
public void nativeKeyPressed(NativeKeyEvent e) {
}
#Override
public void nativeKeyReleased(NativeKeyEvent e) {
System.out.println("KeyReleased: "+e.getKeyCode());
System.out.println(KeyEvent.getKeyText(e.getKeyCode()));
if (e.getKeyCode() == 154) {
try {
final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
final BufferedImage screen = robot.createScreenCapture(new Rectangle(screenSize));
selectArea(screen);
frame.setVisible(true);
} catch(Exception e1) {
e1.printStackTrace();
}
}
}
#Override
public void nativeKeyTyped(NativeKeyEvent e) {
}
}

I recommend that you simplify your problem to solve it. Create a small compilable and runnable program that doesn't have all the baggage of your current code, but whose only goal is to display an image, and let the user select a sub-portion of that image. Then if your attempt fails, you can post your attempt here, and we can actually both run it, and understand it, and hopefully then be able to fix it.
For example, here's a small bit of compilable and runnable code that uses a MouseListener to select a small section of an image. Perhaps you can get some ideas from it:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.*;
#SuppressWarnings("serial")
public class ImagePlay extends JPanel {
public static final String IMAGE_PATH = "http://upload.wikimedia.org/wikipedia/" +
"commons/thumb/3/39/European_Common_Frog_Rana_temporaria.jpg/" +
"800px-European_Common_Frog_Rana_temporaria.jpg";
private static final Color RECT_COLOR = new Color(180, 180, 255);
private BufferedImage img = null;
Point p1 = null;
Point p2 = null;
public ImagePlay() {
URL imgUrl;
try {
imgUrl = new URL(IMAGE_PATH);
img = ImageIO.read(imgUrl );
ImageIcon icon = new ImageIcon(img);
JLabel label = new JLabel(icon) {
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
myLabelPaint(g);
}
};
setLayout(new BorderLayout());
add(new JScrollPane(label));
MouseAdapter mAdapter = new MyMouseAdapter();
label.addMouseListener(mAdapter);
label.addMouseMotionListener(mAdapter);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void myLabelPaint(Graphics g) {
if (p1 != null && p2 != null) {
int x = Math.min(p1.x, p2.x);
int y = Math.min(p1.y, p2.y);
int width = Math.abs(p1.x - p2.x);
int height = Math.abs(p1.y - p2.y);
g.setXORMode(Color.DARK_GRAY);
g.setColor(RECT_COLOR);
g.drawRect(x, y, width, height);
}
}
private class MyMouseAdapter extends MouseAdapter {
#Override
public void mousePressed(MouseEvent e) {
p1 = e.getPoint();
p2 = null;
repaint();
}
#Override
public void mouseDragged(MouseEvent e) {
p2 = e.getPoint();
repaint();
}
#Override
public void mouseReleased(MouseEvent e) {
p2 = e.getPoint();
repaint();
int x = Math.min(p1.x, p2.x);
int y = Math.min(p1.y, p2.y);
int width = Math.abs(p1.x - p2.x);
int height = Math.abs(p1.y - p2.y);
BufferedImage smlImg = img.getSubimage(x, y, width, height);
ImageIcon icon = new ImageIcon(smlImg);
JLabel label = new JLabel(icon);
JOptionPane.showMessageDialog(ImagePlay.this, label, "Selected Image",
JOptionPane.PLAIN_MESSAGE);
}
}
private static void createAndShowGui() {
ImagePlay mainPanel = new ImagePlay();
JFrame frame = new JFrame("ImagePlay");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
It uses a publicly available image obtained online, a MouseListener that's added to a JLabel, and the JLabel has its paintComponent(...) method overridden so as to show the guide lines from the MouseListener/Adapter. It creates the sub image via BufferedImage's getSubimage(...) method, and then it displays it in a JOptionPane, but it would be trivial to save the image if desired.

We Keep Coding

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

How to Change Brightness of Image? - java

You may be able to adapt the approach shown in this RescaleTest, which varies the scaleFactor passed to RescaleOp to a value between zero and twice the slider's maximum.

Related

Why Won't the Java Component JPanel won't disapear?

Why Windows doesn't show the same output for ImageIcon on JButton as Ubuntu?

listen for key event while swing main thread is running

Java Messenger Socket

Screenshot program

Categories

Resources