KeyTester.java Source code

Introduction

Here is the source code for KeyTester.java
Source

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

public class KeyTester {
    static class MyActionListener extends AbstractAction {
        MyActionListener(String s) {
            super(s);
        }

        public void actionPerformed(ActionEvent e) {
            System.out.println(getValue(Action.NAME));
        }
    }

    public static void main(String args[]) {
        String actionKey = "theAction";
        JFrame f = new JFrame("Key Tester");
        JButton jb1 = new JButton("<html><center>B<br>Focused/Typed");
        JButton jb2 = new JButton("<html><center>Ctrl-C<br>Window/Pressed");
        JButton jb3 = new JButton("<html><center>Shift-D<br>Ancestor/Released");
        Container pane = f.getContentPane();
        pane.add(jb1, BorderLayout.NORTH);
        pane.add(jb2, BorderLayout.CENTER);
        pane.add(jb3, BorderLayout.SOUTH);

        KeyStroke stroke = KeyStroke.getKeyStroke("typed B");
        Action action = new MyActionListener("Action Happened");
        // Defaults to JComponent.WHEN_FOCUSED map
        InputMap inputMap = jb1.getInputMap();
        inputMap.put(stroke, actionKey);
        ActionMap actionMap = jb1.getActionMap();
        actionMap.put(actionKey, action);

        stroke = KeyStroke.getKeyStroke("ctrl C");
        action = new MyActionListener("Action Didn't Happen");
        inputMap = jb2.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
        inputMap.put(stroke, actionKey);
        actionMap = jb2.getActionMap();
        actionMap.put(actionKey, action);

        stroke = KeyStroke.getKeyStroke("shift released D");
        action = new MyActionListener("What Happened?");
        inputMap = jb3.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
        inputMap.put(stroke, actionKey);
        actionMap = jb3.getActionMap();
        actionMap.put(actionKey, action);

        f.setSize(200, 200);
        f.show();
    }
}