I broke my code, but I cannot figure out how. At all.
At one point, compiling and running the code rendered a window every single time. Then I worked for about 15 minutes, and the frames no longer appear upon running. I've tried undoing the work, adding run methods, adding a main method, and even copying and pasting code directly from my textbook. Nothing has worked.
I tried to paste as little code as possible. Forgive me if my code is sloppy; this is my first time working with swing. Thanks!
public class LibraryFrame extends JFrame implements ActionListener
{
private JScrollPane studentScroller = new JScrollPane();
private JPanel addStudent = new JPanel();
private JTextField UID = new JTextField();
private JTextField name = new JTextField();
private JTextField email = new JTextField();
private JButton okButton = new JButton("OK");
private JButton closeButton = new JButton("Close");
private JPanel buttonPane = new JPanel();
public LibraryFrame()
{
setTitle("Student Enrollment");
setSize(500,200);
setLocationByPlatform(true);
addStudent.setLayout(new GridLayout(0, 2, 0, 0));
addStudent.add(new JLabel("Enter Student UID:"));
addStudent.add(UID);
addStudent.add(new JLabel("Enter Student Name:"));
addStudent.add(name);
addStudent.add(new JLabel("Enter Student Email:"));
addStudent.add(email);
addStudent.add(Box.createRigidArea(new Dimension(0, 5)));
addStudent.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
okButton.setActionCommand(null);
closeButton.addActionListener(new ActionListener() //implement window close only
{
#Override
public void actionPerformed(ActionEvent e)
{ dispose(); }
});
buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
buttonPane.add(Box.createRigidArea(new Dimension(0, 0)));
buttonPane.add(okButton);
buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
buttonPane.add(closeButton);
Container studentPane = getContentPane();
studentPane.add(addStudent, BorderLayout.CENTER);
studentPane.add(buttonPane, BorderLayout.PAGE_END);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
}
You show no main method, so we don't know how you try to run this.
You add all to studentPane. Where do you add studentPane to the JFrame, to the this object? If it's not added to the GUI, it will not show.
Related
I currently have GridLayout(3,0) and I want to add some buttons. However, nothing shows up when I run my program.
Here is the code (the class extends JFrame):
public void initializeGraphics() {
setLayout(new BorderLayout());
setMinimumSize(new Dimension(1900, 1000));
getContentPane().setLayout(null);
setVisible(true);
createMenu();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void createMenu() {
JPanel menuArea = new JPanel();
menuArea.setLayout(new GridLayout(3,0));
menuArea.setBounds(40,40,740,870);
JButton button1 = new JButton("test1");
JButton button2 = new JButton("test2");
JButton button3 = new JButton("test3");
menuArea.add(button1);
menuArea.add(button2);
menuArea.add(button3);
add(menuArea);
}
You need to create your UI component before setting visible attributes.
edit your code as:
createMenu();
setVisible(true);
There are two things that I am trying to figure out. First thing, I want to figure out how to make a Jcomponent background transparent. When placing a JPanel into another JPanel that has a color set as the background, the JPanel that is set within the other JPanel has a white background that I can't seem to get rid of. I tried using the firstpanel.setOpache function and repaint but it doesn't do anything.
And second, I noticed that putting a JPanel within another JPanel thats within another JPanel compresses it size. The images below will show what I am trying to describe. I want to know what to do to avoid compressing the JPanel size and still able to put it within two levels of other JPanels . The code below is what I am practicing with.
import javax.swing.*;
import java.awt.*;
public class LearningFrame extends JFrame {
private JLabel userLabel;
private LearningFrame(){
JPanel backGroundPanel = new JPanel();
JPanel mainPanel = new JPanel();
JPanel firstPanel = new JPanel();
JPanel secondPanel = new JPanel();
userLabel = new JLabel("User");
userLabel.setFont(new Font("Arial",1 ,24));
backGroundPanel.setBackground(new Color(247,211,53));
// backGroundPanel.setLayout(new BoxLayout(backGroundPanel,BoxLayout.Y_AXIS));
setContentPane(backGroundPanel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(1200,800);
setLocationRelativeTo(null);
//backGroundPanel.setLayout(null);
mainPanel.setLayout(new GridLayout(1,2));
firstPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
secondPanel.setLayout(new BoxLayout(secondPanel,BoxLayout.Y_AXIS));
// firstPanel.setBackground(new Color(211,43,185));
secondPanel.setBackground(new Color(34,233,44));
JButton button = new JButton("Click");
JButton button2 = new JButton("Click");
JButton button3 = new JButton("Click");
JButton button4 = new JButton("Click");
firstPanel.add(button);
firstPanel.add(button2);
firstPanel.add(userLabel);
secondPanel.add(button3);
secondPanel.add(button4);
mainPanel.add(firstPanel);
mainPanel.add(secondPanel);
backGroundPanel.add(mainPanel);
setVisible(true);
}
public JPanel logPanel() {
JPanel logInPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
JTextField userTextField = new JTextField(14);
JTextField passTextField = new JTextField(14);
userLabel = new JLabel("Username: ");
JLabel passLabel = new JLabel("Password: ");
passLabel.setFont(new Font("Arial", Font.BOLD, 24));
userLabel.setFont(new Font("Arial", Font.BOLD, 24));
logInPanel.add(userLabel);
logInPanel.add(userTextField);
logInPanel.add(passLabel);
logInPanel.add(passTextField);
logInPanel.setOpaque(true);
logInPanel.repaint();
return logInPanel;
}
public static void main(String[] args){
LearningFrame x = new LearningFrame();
}
}
Just use
firstPanel.setOpaque(false);
This is will make the background of the component invisible, but you will still be able to see any components that are positioned inside it.
I'm using the BeautyEye Laf for a Java Swing application.
I'm setting a JTextField inside a JPopupMenu. The JTextField appears disabled no matter what I do. The code is a bit complicated but I've made this snippet that's easily testable
public static void main(String[] s)
throws Exception
{
BeautyEyeLNFHelper.frameBorderStyle = BeautyEyeLNFHelper.FrameBorderStyle.generalNoTranslucencyShadow;
org.jb2011.lnf.beautyeye.BeautyEyeLNFHelper.launchBeautyEyeLNF();
final JPopupMenu popupTable = new JPopupMenu();
// find panel
JLabel findLabel = new JLabel("Filter for:");
findLabel.setPreferredSize(new Dimension(60, 20));
final JTextField findTextField = new JTextField();
findTextField.setColumns(10);
final JPanel container = new JPanel();
container.setLayout(new FlowLayout(FlowLayout.LEFT, 10, 0));
container.add(findLabel);
container.add(findTextField);
popupTable.add(container);
JButton button = new JButton("Action");
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
buttonPanel.add(button);
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.add(popupTable, BorderLayout.CENTER);
panel.add(buttonPanel, BorderLayout.SOUTH);
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(900, 800);
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(panel, BorderLayout.CENTER);
frame.setVisible(true);
button.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
int x = (frame.getWidth() / 2);
int y = (frame.getHeight() / 2);
popupTable.show(frame, x, y);
}
}
);
}
If I remove the LaF (comment the first two lines) everything works as expected. The JTextField is editable. I'm asking here first in hope that I'm doing something wrong. If this proves to be a bug I will post this as an issue on Github.
In the end it was a minor change in the library. From the author:
You can find class
org.jb2011.lnf.beautyeye.ch7_popup.TranslucentPopupFactory source code
at line 416, change "setFocusableWindowState(false);" to
"setFocusableWindowState(true);" or just delete this line.
It's strange i don't know why but i cannot remove my jpanel from my frame.
I tried everything but nothing after this instrunctions i still continue to see the jpanel:
frame.getContentPane().remove(myPanel);
i have also tried to do:
frame.remove(...);
frame.add(...);
frame.revalidate();
frame.repaint();
but still i continue to see the panel in the frame.
This is my code (im developing a little app about the student note) and now i would like to remove my first panel just to do an experiment:
package StudApp;
import java.awt.BorderLayout;
public class StudApp {
private JPanel homeFirstRun;
private ArrayList<Corso> corsi = new ArrayList<Corso>();
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
new StudApp();
}
});
}
/**
* Create the frame.
*/
public StudApp() {
JFrame frame = new JFrame("Student Note");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(100, 100, 450, 300);
JMenuBar menuBar = new JMenuBar();
frame.setJMenuBar(menuBar);
JMenu menuHelp = new JMenu("Help");
menuBar.add(menuHelp);
JMenuItem menuIstrStud = new JMenuItem("Istruzioni Student Note");
menuHelp.add(menuIstrStud);
homeFirstRun = new JPanel();
homeFirstRun.setBorder(new EmptyBorder(5, 5, 5, 5));
frame.setContentPane(homeFirstRun);
homeFirstRun.setLayout(null);
JLabel welcomeMessage = new JLabel("Welcome to Student Note");
welcomeMessage.setBounds(5, 5, 424, 18);
welcomeMessage.setForeground(Color.DARK_GRAY);
welcomeMessage.setHorizontalAlignment(SwingConstants.CENTER);
welcomeMessage.setFont(new Font("Verdana", Font.BOLD, 14));
homeFirstRun.add(welcomeMessage);
JLabel welcomeCit = new JLabel("\"Software is like sex, it's better when it's free.\"");
welcomeCit.setFont(new Font("Verdana", Font.ITALIC, 11));
welcomeCit.setHorizontalAlignment(SwingConstants.CENTER);
welcomeCit.setBounds(35, 199, 361, 14);
homeFirstRun.add(welcomeCit);
JTextArea welcomeTextArea = new JTextArea();
welcomeTextArea.setFont(new Font("Verdana", Font.PLAIN, 13));
welcomeTextArea.setText(" I think it's your first time here.\n\n"
+ " So the first step is to create a new course to\n insert your grades.\n\n");
welcomeTextArea.setEditable(false);
welcomeTextArea.setBounds(27, 34, 381, 184);
homeFirstRun.add(welcomeTextArea);
frame.setVisible(true);
frame.remove(homeFirstRun); //here im doing a test because i wanna see if the homeFirstRun panel go out from the frame
// but not it remains.
}
}
Basically, because you used frame.setContentPane(homeFirstRun);, frame.remove(homeFirstRun); is being delegated to the content pane, so it's like saying...
homeFirstRun.remove(homeFirstRun);
Which obviously makes no sense...
Instead trying using something like...
frame.add(homeFirstRun);
//...
frame.remove(homeFirstRun);
Or a CardLayout, or in fact, any layout manager at all...
public class MainMenu extends JFrame {
private JPanel panel,file_list_panel;
private JPanel contentPane;
private JMenuBar menuBar;
private JMenu mnNewMenu1,mnNewMenu2,mnNewMenu3;
private JMenuItem mt1,mt2,mt3;
private JPanel right,left ,bottom;
private JSplitPane spver ,sphor;
private JTabbedPane tabbedPane;
private JLabel label;
private JList<String> list_1;
private JScrollPane jscroll_list;
private DefaultListModel listmodel_1 = new DefaultListModel();
public MainMenu() {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(0,0,screenSize.width, screenSize.height);
setExtendedState(getExtendedState() | JFrame.MAXIMIZED_BOTH);
int intValue = Integer.parseInt( "EEEEEE",16);
Color aColor = new Color( intValue );
UIManager.put("TabbedPane.background", new Color(230, 216, 174));
UIManager.put("TabbedPane.selected", Color.WHITE);
UIManager.put("TabbedPane.contentAreaColor",aColor );
UIManager.put("TabbedPane.focus", Color.WHITE);
setTitle("Main Menu");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//setBounds(100, 100, 848, 680);
//setLocation(10, 10);
setLocationRelativeTo(null); // set jFrame alignment to center
//parent(first) panel
contentPane = new JPanel();
contentPane.setBackground(Color.BLACK);
contentPane.setBorder(new EmptyBorder(2, 2, 2, 2));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
//Main Menu BAR
menuBar = new JMenuBar();
menuBar.setFont(new Font("Tekton Pro Ext", Font.PLAIN, 11));
setJMenuBar(menuBar);
//Menu 1
mnNewMenu1 = new JMenu("New menu");
menuBar.add(mnNewMenu1);
//Menu 1 MenuItem 1
mt1 = new JMenuItem("Browse New Project");
mt1.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
BrowseScreen frame = new BrowseScreen();
frame.setVisible(true);
}
});
mnNewMenu1.add(mt1);
//second panel
panel = new JPanel();
contentPane.add(panel, BorderLayout.CENTER);
panel.setLayout(new BorderLayout(0, 0));
spver =new JSplitPane(JSplitPane.VERTICAL_SPLIT);
spver.setDividerLocation(500);
spver.setEnabled(false);
bottom=new JPanel();
sphor =new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
sphor.setEnabled(false);
spver.setTopComponent(sphor);
spver.setBottomComponent(bottom);
bottom.setLayout(null);
panel.add(spver);
sphor.setDividerLocation(180);
left =new JPanel();
right =new JPanel();
sphor.setRightComponent(right);
right.setLayout(new GridLayout(0, 1, 0, 0));
tabbedPane = new JTabbedPane(JTabbedPane.TOP);
tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
JPanel tab1 = new JPanel();
tabbedPane.addTab("fffa", tab1);
tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);
JPanel tab2 = new JPanel();
tabbedPane.addTab("TAB1", tab2);
tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);
right.add(tabbedPane);
sphor.setLeftComponent(left);
left.setLayout(new BorderLayout(0, 0));
file_list_panel= new JPanel();
file_list_panel.setBackground(Color.BLACK);
file_list_panel.setForeground(Color.WHITE);
label = new JLabel("Java Files of Project");
label.setBackground(Color.BLACK);
label.setForeground(Color.WHITE);
label.setFont(new Font("Garamond", Font.BOLD, 14));
file_list_panel.add(label);
left.add(file_list_panel, BorderLayout.NORTH);
list_1 = new JList<String>(listmodel_1);
jscroll_list = new JScrollPane(list_1);
left.add(jscroll_list, BorderLayout.CENTER);
}
public void setList(Vector<String> files){
listmodel_1.removeAllElements();
list_1.removeAll();
for(int i=0;i<files.size();i++)
listmodel_1. addElement(files.elementAt(i));
list_1.setModel(listmodel_1);
this.invalidate();
this.validate();
this.repaint();
}
}
setList is called from the browse window before it calls setVisible(false);
ie . this methods gets called when the browse window disappears .. it does all the things in method but does not update it in the MainMenu
public void setFileList(){
MainMenu mm= new MainMenu();
mm.setList(java_files);
}
list_1 -JList listmodel_1=DefaultListModel
i've tried to refreshing the frame but does not refresh after adding the new list to the Main Window ...
before JList is updated im browsing the the files in another window then it is set to setVisible(false) then MainMenu gets focused and calls the setList method but its not changing
You're creating a new JList<String> and copying the reference to your instance variable - but you're neither removing the old JList from the frame, nor adding the new one. Just changing the variable won't do that.
Rather than creating a new JList<String>, why don't you just replace the model of the existing one? Remove this line:
list_1=new JList<String>(listmodel_1);
and you may find it just works. (You're already setting the model in the subsequent line...)
Basically, you are creating a new JList and associating your model with it, but this has no effect on the JList that is on the screen
public void setList(Vector<String> files){
// Good...
listmodel_1.removeAllElements();
// Not required, has nothing to do with the items in the list
//list_1.removeAll();
// Good
for(int i=0;i<files.size();i++)
listmodel_1. addElement(files.elementAt(i));
// This here is your problem
//list_1=new JList<String>(listmodel_1);
// Because I have no idea what model list_1 is actually using...
list_1.setModel(listmodel_1);
//list_1.setSelectedIndex(0);
//this.invalidate();
//this.validate();
//this.repaint();
}