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Close windows without closing Application

Good afternoon!
I have this code:
private static class ClickListener implements ActionListener {
public ClickListener() {
}
#Override
public void actionPerformed(ActionEvent e) {
JFrame frame = new JFrame();
JLabel label = new JLabel("Opção Indisponivel");
JPanel panel = new JPanel();
frame.add(label, BorderLayout.CENTER);
frame.setSize(300, 400);
JButton button = new JButton("Voltar");
button.addActionListener(new CloseWindowListener());
panel.add(button);
frame.add(panel, BorderLayout.SOUTH);
frame.setVisible(true);
}
}
private static class CloseWindowListener implements ActionListener {
public CloseWindowListener() {
}
#Override
public void actionPerformed(ActionEvent e) {
setVisible(false);
}
}
What I want to do is when i click on the button "voltar" (which is in another window, not on the "main" one as you can see) it closes the windows but not the app itselft. The setVisible line gives me an error about that it cannot be referenced by a static context which I understand because I need the reference of the frame. How do I solve this?
EDIT: Changed JFrame to JDialog but still no sucess. Both windows are shutdown.
Thanks in advance,
Diogo Santos

The setVisible line gives me an error about that it cannot be referenced by a static context which I understand because I need the reference of the frame. How do I solve this?
You can access the component that generated the event. Then you can find the window the component belongs to. This will give you generic code to hide any window:
//setVisible(false);
JButton button = (JButton)e.getSource();
Window window = SwingUtilities.windowForComponent(button);
window.setVisible(false);
You can also check out Closing an Application. The ExitAction can be added to your button. Now when you click the button it will be like clicking the "x" (close) button of the window. That is whatever default close operation your specify for the window will be invoked.

Swing - Dispose a frame [duplicate]

This question already has answers here:
The Use of Multiple JFrames: Good or Bad Practice? [closed]
(9 answers)
Closed 7 years ago.
My aim is for an action listener to close a specific JFrame when the user hits the JButton to quit.
Overall, when the program starts a large JFrame opens then a small one in front....in my code the user enters some details in this small one and hits submit(for the sake of simplicity, ive omitted this code here and replaced submit with quit)
So when this quit buttons pressed. I expect this small JFrame to close. I can't seem to figure this out. The action listeners in a different class and ive tried making instances and had no luck. I've commented out the code I've tried below when attempting to solve this issue.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class test
{
public static void main(String Args[])
{
makeGUI m = new makeGUI();
}
}
class makeGUI
{
JButton close = new JButton("CLOSE ME");
makeGUI()
{
frame f1 = new frame();
JFrame smallframe = new JFrame(); //want to close this one
JPanel jp = new JPanel(new FlowLayout());
smallframe.setSize(300,300);
smallframe.setLocationRelativeTo(null);
smallframe.setDefaultCloseOperation(smallframe.DISPOSE_ON_CLOSE);
close.addActionListener(new action());
jp.add(close);
smallframe.add(jp);
smallframe.setVisible(true);
}
class action implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
//makeGUI s1 = new makeGUI();
if (e.getSource () == close)
{
//s1.smallframe.dispose();
System.out.println("gotcha");
}
}
}
}
class frame extends JFrame
{
frame ()
{
setExtendedState(JFrame.MAXIMIZED_BOTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("big one");
setVisible(true);
}
}

First, it's not a good practice to name classes with a lowercase, so try renaming to something like MakeGUI instead of makeGUI.
The problem with your commented code is that it creates a new instance of makeGUI every time the button is clicked and the action listener is invoked. The result is that when you click on the close button, a new frame is created, then an inner one and this inner one gets immediately closed. The only thing you'd be doing is creating more and more frames. You should keep the instance as a state, for instance as a class member:
class MakeGUI {
JFrame smallframe;
JButton close = new JButton("CLOSE ME");
MakeGUI() {
frame f1 = new frame();
smallframe = new JFrame(); //want to close this one
JPanel jp = new JPanel(new FlowLayout());
smallframe.setSize(300, 300);
smallframe.setLocationRelativeTo(null);
smallframe.setDefaultCloseOperation(smallframe.DISPOSE_ON_CLOSE);
close.addActionListener(new action());
jp.add(close);
smallframe.add(jp);
smallframe.setVisible(true);
}
class action implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == close) {
// use this instead of dispose
smallframe.dispatchEvent(new WindowEvent(smallframe, WindowEvent.WINDOW_CLOSING));
System.out.println("gotcha");
}
}
}
}

If you want to simulate someone pressing the [X] button then you can use this code to programmatically trigger this event:
smallFrame.dispatchEvent(new WindowEvent(smallFrame, WindowEvent.WINDOW_CLOSING));
Aside from that, your code is not working because you are not closing your instance of the small window, instead you are creating another instance and disposing of it. Inside your close event you should be closing the smallFrame instance.
You can do this by either passing your JFrame to the constructor of your ActionListener or making smallFrame a class variable.
It appears you are using the small JFrame as a pop up to get information or display information. If so, you may want to look into the JOptionPane class which is made for "Dialogue Boxes".
Documentation:
http://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html

How to initiate an action upon clicking a jbutton in Java [closed]

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I'm wondering how to initiate an action if a jbutton is clicked on in my JFrame.
I've tried searching for answers but haven't had much luck.
This is all i have right now, i basically just want some text to be displayed upon clicking the button.
public class Slots {
public static void main(String[] args){
Slots();
}
public static void Slots(){
//JFRAME
JFrame f = new JFrame("Slots Game");
f.setSize(500, 500);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
f.setResizable(false);
//JButton
JButton Button = new JButton("Start");
f.add(Button, BorderLayout.PAGE_END);
f.setVisible(true);
}
}

There are 3 ways to do that.
Create a class that implements the ActionListener interface. And then add an instance of that class as an action listener to the button.
Making the current class (in your case Slots) implement the ActionListener interface. And then adding "this" as the action listener to the button.
The third method, which is probably the most convenient/efficient method, is using an anonymous inner class like below.
button.addActionListener(new ActionListener() {
public void actionPerfored(ActionEvent e)
{
// your code goes here
}
});
For more details see ActionListener API

Closing a Window with Button

I am currently studying Java to improve myself. I have a program which has a main window, menu and submenus.
I have other windows on when I click on my submenus.
One of them is setRates which is
public SetMyRates(){
JPanel dataPanel = new JPanel(new GridLayout(2, 2, 12, 6));
dataPanel.add(setTLLabel);
dataPanel.add(setDollarsLabel);
dataPanel.add(setTLField);
dataPanel.add(setDollarsField);
JPanel buttonPanel = new JPanel();
buttonPanel.add(closeButton);
buttonPanel.add(setTLButton);
buttonPanel.add(setDollarsButton);
Container container = this.getContentPane();
container.add(dataPanel, BorderLayout.CENTER);
container.add(buttonPanel, BorderLayout.SOUTH);
setTLButton.addActionListener(new SetTL());
setDollarsButton.addActionListener(new SetDollars());
closeButton.addActionListener(new closeFrame());
dataPanel.setVisible(true);
pack();
}
and I want that window to close when I click on my closeButton.
I made a class for closeButton, actionListener which is:
private class closeFrame implements ActionListener{
public void actionPerformed(ActionEvent e){
try{
dispose();
}
catch(Exception ex){
JOptionPane.showMessageDialog(null, "Please enter correct Rate.");
}
}
}
But when I click that button, it closes my main window instead of my submenus window. What should I exactly do to fix the problem?

You need to get a reference to the Window that you want to close and call dispose() directly on that reference. How you do this will depend on the details of your program -- information that we're currently not privy to.
Edit: one way to get that reference is via SwingUtilities.getWindowAncestor(...). Pass in the JButton reference returned from your ActionEvent object and call dispose on it. Something like...
public void actionPerformed(ActionEvent e) {
Object o = e.getSource();
if (o instanceof JComponent) {
JComponent component = (JComponent)o;
Window win = SwingUtilities.getWindowAncestor(component);
win.dispose();
}
}
caveat: code neither compiled nor run nor tested in any way.
Also note that for this to work, the component that holds and activates the ActionListener has to reside on the Window that you wish to close, else this won't work.

From what I think you could easily when opening an another window just store a reference to it and use it inside the action listener. Something along these lines:
JFrame openedWindow;
//inside the listener
if(openedWindow)
openedWindow.dispose();
else dispose();

Performing action when closing JFrame

In my program I have a main JFrame that holds a button. When this button is clicked a new JFrame appears in which I can change some information. Whenever I finish editing I press a save button on the new JFrame which saves the changes and disposes the JFrame. Now when this is done, I'd like to perform an action in the main JFrame as well, but only if something changed. If I open the new JFrame and just close it again without using the save button, I don't want to do anything in the main frame.
I've tried searching the web for a solution, but just don't seem to be anything useful out there..
An example of the code I've got so far:
Main Frame...
public class MainFrame extends JFrame
{
public MainFrame()
{
super("Main Frame");
JButton details = new JButton("Add Detail");
add(details);
details.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
new DetailFrame().setVisible(true);
}
});
}
}
Detail Frame...
public class DetailFrame extends JFrame
{
public DetailFrame()
{
super("Detail Frame");
JButton save = new JButton("Save");
add(save);
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
// Save whatever content
dispose();
}
});
}
}
So when I click the "Save" button on the Detail Frame, I want to do something in the Main Frame, whereas when the "x" is clicked on the Detail Frame, I don't want to do anything..
Hope someone is able to help me, and sorry for my english..

You can pass a MainFrame handle to the DetailFrame constructor. Then, on clicking the Save button, the DetailFrame would call a function in MainFrame and pass the changes to it.
Another way is to create a public boolean variable in DetailFrame and set it to true when the Save button is clicked. This way MainFrame will know whether the DetailFrame was closed or Save'd.
EDIT: Some more ideas:
Use JDialog instead of JFrame. JDialog.setVisible is modal, i.e. it will block the calling function until the dialog is closed; this way you can process the results of the dialog in the same "Details" button listener.
To access the dialog after it is called, store the dialog in a separate variable. First construct the dialog, then show it, and then process the result by analyzing its variables.
Store the results of editing in other public variables of DetailFrame (or let's call it DetailDialog). This should happen only when the "Save" button is clicked. This may even allow to go without the boolean variable (depends on the types of values you are editing).
DetailDialog dlg = new DetailDialog();
dlg.setVisible(true);
if(dlg.approvedResult != null) {
// process the result...
}
EDIT: Sorry, JDialog is not modal by default. Need to call a special super constructor to make it modal.
Also, here you will have to pass the reference to MainFrame to the dialog constructor, but you still can declare it as a simple JFrame and avoid unnecessary dependencies.
To get the reference to the enclosing MainFrame from within the anonymous ActionListener, use MainFrame.this.
To be able to change the button text after it was created, you will have to store the button in a member variable.
Main Frame...
public class MainFrame extends JFrame
{
private JButton details = new JButton("Add Detail");
public MainFrame()
{
super("Main Frame");
getContentPane().add(details);
details.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
DetailDialog dlg = new DetailDialog(MainFrame.this);
dlg.setVisible(true);
if(dlg.approved){
details.setText("Edit Detail");
}
}
});
}
}
Detail Dialog... (not Frame)
public class DetailDialog extends JDialog
{
public boolean approved = false;
public DetailDialog(JFrame parent)
{
super(parent,"Detail Dialog",true); // modal dialog parented to the calling frame
JButton save = new JButton("Save");
getContentPane().add(save);
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
// Save whatever content
approved = true;
dispose();
}
});
}
}

Create the detail frame in the main frame, and add a windowlistener to it, using the windowadapter class. Implement the windowclosing event by checking for changes, handle those, and then dispose the detail frame. This is all done in the mainframe.
The detail frame should have do nothing on close set to prevent the detail frame being disposed before you recorded the changes.
You may wish to implement checking for changes in the detailframe as a method returning a class holding the interesting data. That way your windowlistener can be small an to the point.

Forget the 2nd JFrame. use a modal dialog instead. It will block input until dismissed. Once dismissed, the only thing to do is decide whether to update the original data. JOptionPane has some inbuilt functionality that makes that easy. If the user presses Cancel or the esc key, the showInputDialog() method will return null as the result.
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
class EditInfo {
public static void main(String[] args) {
Runnable r = new Runnable() {
public void run() {
final JFrame f = new JFrame("Uneditable");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel(new BorderLayout(10,10));
final JTextField tf = new JTextField("Hello World!", 20);
tf.setEnabled(false);
p.add(tf, BorderLayout.CENTER);
JButton edit = new JButton("Edit");
edit.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent ae) {
String result = JOptionPane.showInputDialog(
f,
"Edit text",
tf.getText());
if (result!=null) {
tf.setText(result);
}
}
} );
p.add(edit, BorderLayout.EAST);
p.setBorder(new EmptyBorder(10,10,10,10));
f.setContentPane(p);
f.pack();
f.setLocationByPlatform(true);
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
If it is necessary to edit a number of fields all at once in the JOptionPane, use a JPanel to contain them all, and put them in a showMessageDialog() call. Check the integer based return result to determine if the user OK'd the changes.