I have this JFrame that has a JScrollPane and a JTextArea inside it, it works okay but the scroll button only appears at the bottom, I want it to show at the top as default. How can I change this?
public class frameMyPasswords extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
frameMyPasswords frame = new frameMyPasswords();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public frameMyPasswords() {
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
//scrollPane.getViewport().setViewPosition( new Point(0, 0) );
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.getVerticalScrollBar().setValue(0);
scrollPane.setBounds(10, 45, 414, 194);
contentPane.add(scrollPane);
JTextArea txtField = new JTextArea();
scrollPane.setViewportView(txtField);
txtField.setLineWrap(true);
txtField.setEditable(false);
txtField.setToolTipText("");
txtField.setText("LONG TEXT");
}
}
Related
I am doing my first Java Swing app, I am using Windows Builder for this.
I have a MainFrame that extends JFrame.
public class MainFrame extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MainFrame frame = new MainFrame();
frame.setVisible(true);
PanelTest panelTest = new PanelTest();
frame.getContentPane().add(panelTest);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public MainFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
}
}
Then I have in another class my JPanel
package gui;
public class PanelTest extends JPanel {
/**
* Create the panel.
*/
public PanelTest() {
setBounds(100, 100, 1225, 835);
//getContentPane().setLayout(new BorderLayout());
contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
//getContentPane().add(contentPanel, BorderLayout.CENTER);
contentPanel.setLayout(null);
{
JLabel lblCreacion = new JLabel("Hello");
lblCreacion.setBounds(180, 16, 427, 20);
contentPanel.add(lblCreacion);
}
}
I don't get it, the panel works fine in Windows Builder but once I add it, nothing appears, there is already a layout in the JFrame so I don't know what is missing.
Thank you.
The problem is that it does not work when you add the element after making it visible with frame.setVisible(true); .
Code should be like this:
PanelTest panelTest = new PanelTest();
frame.getContentPane().add(panelTest);
frame.setVisible(true);
Thanks!.
I'm trying to add an icon to my JButton, but I keep getting an NullPointerException meaning that the image i specified cannot be found.
Both my classes and the buttonremoterefresh.png are directly inside the src folder (the classes are inside the default package). I have been googling this around since last night and no matter what I try, I can't manage to load the resource.
public class InfiltratorClient {
private MainWindow mw;
public static void main(String[] args) {
new InfiltratorClient();
}
public InfiltratorClient () {
mw = new MainWindow();
}
}
public class MainWindow extends JFrame {
private JPanel contentPane;
private InfiltratorClient n;
public MainWindow() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
this.setSize(650, 600);
setVisible(true);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JButton btnNewButton = new JButton("New button");
btnNewButton.setBounds(258, 228, 140, 105);
contentPane.add(btnNewButton);
//In this Line i get the exception
ImageIcon icon = new ImageIcon(MainWindow.class.getResource("buttonremorerefresh.png"));
btnNewButton.setIcon(icon);
repaint();
revalidate();
}
}
use this code
JButton button = new JButton();
try {
Image img = ImageIO.read(getClass().getResource("buttonremorerefresh.png"));
button.setIcon(new ImageIcon(img));
} catch (IOException ex) {
}
I have created 2 JFrames and tying to link two JFrames Windows together. But i couldnt get the content in the 2nd Jframe. Can anyone help me with this?
My first Frame:
public class Main extends JFrame {
private JPanel contentPane;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main frame = new Main();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Main() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JButton btnOpenTheJung = new JButton("Open the JUNG window");
btnOpenTheJung.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
**JungLearning1 frame1 = new JungLearning1();
frame1.setVisible(true);
frame1.setSize(600, 400);**
}
});
btnOpenTheJung.setBounds(172, 99, 145, 34);
contentPane.add(btnOpenTheJung);
}}
My second Frame:
public class JungLearning1 extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
DirectedSparseGraph<String, String> g = new DirectedSparseGraph<String, String>();
g.addVertex("Vertex1");
g.addVertex("Vertex2");
g.addVertex("Vertex3");
g.addEdge("Edge1", "Vertex1", "Vertex2");
g.addEdge("Edge2", "Vertex1", "Vertex3");
g.addEdge("Edge3", "Vertex3", "Vertex1");
VisualizationImageServer<String, String> vs = new VisualizationImageServer<String, String>(
new CircleLayout<String, String>(g), new Dimension(
200, 200));
**JFrame frame1 = new JFrame();
frame1.getContentPane().add(vs);
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.pack();
frame1.setVisible(true);**
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public JungLearning1() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
}}
I want to display the 2nd frame along with the content when clicking the butten from the first window
I'm trying to create a sort of log of all the keys hit, at the moment I just need to figure out how to either:
Link the position of the "text" to the scroll bar to the right
OR
Add a different component which is suited better to hold large amounts of multiple line text.
What am I doing wrong here? Thanks!
public class MacroMakerGui extends JFrame {
public static final long serialVersionUID = 1L;
public static JPanel contentPane;
public static JTextField textField = new JTextField();;
public static MacroKeyListener keylistener = new MacroKeyListener(textField);
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MacroMakerGui frame = new MacroMakerGui();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public MacroMakerGui() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 126, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(null);
setContentPane(contentPane);
JButton btnNewButton = new JButton("Record Macro");
btnNewButton.setBounds(10, 220, 99, 30);
contentPane.add(btnNewButton, null);
textField.setBounds(10, 189, 99, 20);
contentPane.add(textField);
textField.setColumns(10);
JEditorPane editorPane = new JEditorPane();
editorPane.setBounds(10, 11, 84, 153);
contentPane.add(editorPane);
JScrollBar scrollBar = new JScrollBar();
scrollBar.setBounds(93, 11, 17, 153);
contentPane.add(scrollBar);
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
btnNewButton.addKeyListener(keylistener);
}
});
}
}
Instead of JScrollBar, use JScrollPanel. Add that to the contentPane, and add your editorPane as a chiled of the JScrollPanel.
I have a simple gui, that is suppose to shows table(JTable). How to make it switch to table1(JTable) after x amount of seconds, and then back to table after x amount of seconds and have that run in a loop. I know setting the other table is nothing more than putting this line in:
scrollPane.setViewportView(table1);
but how to switch from one to the other and back periodically. Guess I have to use the Timer but need some help with this one.thanks
Here is the simple example code:
public class t extends JFrame {
private JPanel contentPane;
private JTable table;
private JTable table1;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
t frame = new t();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public t() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable(10,10);
table1 = new JTable(10,5);
scrollPane.setViewportView(table);
}
}
THE FINAL RESULT:
public class t extends JFrame {
private JPanel contentPane;
private JTable table;
private JTable table1;
private Timer timer;
private Timer timer1;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
t frame = new t();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public t() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable(10,10);
table1 = new JTable(10,5);
scrollPane.setViewportView(table);
ActionListener action = new ActionListener()
{
#Override
public void actionPerformed(ActionEvent event)
{
timer.stop();
scrollPane.setViewportView(table1);
timer1.start();
}
};
ActionListener action1 = new ActionListener()
{
#Override
public void actionPerformed(ActionEvent event)
{
timer1.stop();
scrollPane.setViewportView(table);
timer.start();
}
};
timer = new Timer(3000, action);
timer.start();
timer1 = new Timer(3000, action1);
}
}
here is the working example of what i wanted.thanks everyone for help