Các lớp Adapter trong Java AWT

package vn.viettuts.awt;

import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class AdapterExample1 {
    Frame frame;

    AdapterExample1() {
        frame = new Frame("Ví dụ WindowAdapter trong Java AWT");
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                frame.dispose();
            }
        });

        frame.setSize(400, 250);
        frame.setLayout(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        new AdapterExample1();
    }
}

package vn.viettuts.awt;

import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class MouseAdapterExample extends MouseAdapter {
    private Frame frame;

    public MouseAdapterExample() {
        frame = new Frame("Ví dụ MouseAdapter trong Java AWT");
        frame.addMouseListener(this);

        frame.setSize(400, 300);
        frame.setLayout(null);
        frame.setVisible(true);
        // close window
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(1);
            }
        });
    }

    public void mouseClicked(MouseEvent e) {
        Graphics g = frame.getGraphics();
        g.setColor(Color.BLUE);
        g.fillOval(e.getX(), e.getY(), 20, 20);
    }

    /**
     * main
     * 
     * @param args
     */
    public static void main(String[] args) {
        new MouseAdapterExample();
    }
}

package vn.viettuts.awt;

import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class MouseMotionAdapterExample extends MouseMotionAdapter {
    private Frame frame;

    public MouseMotionAdapterExample() {
        frame = new Frame("Ví dụ MouseMotionAdapter trong Java AWT");
        frame.addMouseMotionListener(this);

        frame.setSize(400, 400);
        frame.setLayout(null);
        frame.setVisible(true);

        // close window
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(1);
            }
        });
    }

    public void mouseDragged(MouseEvent e) {
        Graphics g = frame.getGraphics();
        g.setColor(Color.RED);
        g.fillOval(e.getX(), e.getY(), 10, 10);
    }

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

package vn.viettuts.awt;

import java.awt.Frame;
import java.awt.Label;
import java.awt.TextArea;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class KeyAdapterExample extends KeyAdapter {
    Label label;
    TextArea textArea;
    Frame frame;

    KeyAdapterExample() {
        frame = new Frame("Ví dụ KeyAdapter trong Java AWT");
        label = new Label();
        label.setBounds(20, 50, 200, 20);
        textArea = new TextArea();
        textArea.setBounds(20, 80, 300, 300);
        textArea.addKeyListener(this);

        frame.add(label);
        frame.add(textArea);
        frame.setSize(400, 400);
        frame.setLayout(null);
        frame.setVisible(true);

        // close window
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(1);
            }
        });
    }

    public void keyReleased(KeyEvent e) {
        String text = textArea.getText();
        String words[] = text.split("s");
        label.setText("Words: " + words.length + " Characters:" + text.length());
    }

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