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Java Swing: Can I set a button mnemonic that doesn't require pressing alt?

By : user3850910
Date : October 18 2020, 11:12 AM
I wish this help you Actions can bind a chunk of code to a menu item, a keystroke, a button and anything else you are interested.
In general, don't think of your code as tied to a specific keypress/event--and don't use anonymous inner classes. Instead use real classes where your code can be reused for different types of things. That pattern used by the Action class gives some good examples of this.
code :

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How to put mnemonic under the second instance of a Character (Java-Swing)?

By : user3287422
Date : March 29 2020, 07:55 AM
seems to work fine I have a JButton named button1 with text "Alter Today". , Try this -
code :


How to stop a Thread by pressing a Java Swing button?

By : allegrolite
Date : March 29 2020, 07:55 AM
this one helps. I created a Thread which plays a song from an implemented Runnable class(Soundtrack), I wanna stop it by pressing my button(jMenuItem1ActionPerformed). I googled it & tried many ways to stop but failed I think in my case there's another way to do that. The following code below: , I wanna thank my sister for the solution:
code :
public static class Soundtrack implements Runnable {
    public void run() {
        File file = new File("SF.mp3");
        FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis);

            Player player = new Player(bis);
        }catch(JavaLayerException ex){}
    }catch(IOException e){}
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
    // TODO add your handling code here:
private static Thread background;
public static void main(String args[]) {
    background = new Thread(new Soundtrack());

Saving texts from textField without clicking or pressing the save button in java swing

By : user1498522
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You need to use DocumentFilter and add it to your JTextField using the following: ((AbstractDocument) textbox.getDocument()).setDocumentFilter(filter); to add it. Here is an example a MCVE:
code :
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

public class Example extends JFrame {

    JTextField textbox = new JTextField(" ", 20);

    public Example() {
        JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER));

        DocumentFilter filter = new DocumentFilter() {
            public void insertString(DocumentFilter.FilterBypass fb, int offset, String string,
                AttributeSet attr) throws BadLocationException {
                super.insertString(fb, offset, string, attr);

            public void remove(DocumentFilter.FilterBypass fb, int offset, int length)
                throws BadLocationException {
                super.remove(fb, offset, length);

            public void replace(DocumentFilter.FilterBypass fb, int offset, int length, String text,
                AttributeSet attrs) throws BadLocationException {
                super.replace(fb, offset, length, text, attrs);

        ((AbstractDocument) textbox.getDocument()).setDocumentFilter(filter);

    public static void main(String[] args) {
        new Example();

Java Swing JMenu Mnemonic

By : Ramin Mobasseri
Date : March 29 2020, 07:55 AM
Hope this helps I have a menu that I created using JMenu. I want to assign a shortcut key Alt-F to this menu. I used setMnemonic('F') to do that, but the menu does not recognise the mnemonic. , Inside of a class constructor (extending JFrame):

Change mnemonic modifier key in Java/Swing

By : Pentabuzz
Date : March 29 2020, 07:55 AM
This might help you Apparently this isn't as straightforward as you might think, but there is a way.
First of all, for menus (JMenu) there is a property which is controlled by the look and feel called Menu.shortcutKeyswhich you can set manually. This sets the mnemonic modifier for menus in the specific look and feel. If you want more information about this feel free to ask.
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