MyActionListener.java Source code

Introduction

Here is the source code for MyActionListener.java

Source

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

class MyActionListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        System.out.println("Command: " + e.getActionCommand());
        int modifiers = e.getModifiers();
        System.out.println("\tALT : " + checkMod(modifiers, ActionEvent.ALT_MASK));
        System.out.println("\tCTRL : " + checkMod(modifiers, ActionEvent.CTRL_MASK));
        System.out.println("\tMETA : " + checkMod(modifiers, ActionEvent.META_MASK));
        System.out.println("\tSHIFT: " + checkMod(modifiers, ActionEvent.SHIFT_MASK));
        Object source = e.getSource();
        if (source instanceof JButton) {
            JButton jb = (JButton) source;
            System.out.println("JButton: " + jb.getText());
        }
    }

    private boolean checkMod(int modifiers, int mask) {
        return ((modifiers & mask) == mask);
    }
}

public class Main {
    public static void main(String args[]) {
        JFrame frame = new JFrame();

        JButton button = new JButton("Click and holding alt, control, and shift key");
        button.addActionListener(new MyActionListener());
        frame.add(button);
        frame.pack();
        frame.setVisible(true);
    }
}