java例程练习（匿名类用法）

//用匿名类实现关闭窗口功能
import java.awt.*;
import java.awt.event.*;
public class TestAnony {
    Frame f = new Frame("Test");
    TextField tf = new TextField(10);
    Button b1 = new Button("Start");

    public TestAnony() {
        f.add(b1, BorderLayout.NORTH);
        f.add(tf, BorderLayout.SOUTH);

        b1.addActionListener(new ActionListener() {
            private int i;
            public void actionPerformed(ActionEvent e) {
                tf.setText(e.getActionCommand() + ++i);
            }
        });

        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                f.setVisible(false);
                System.exit(0);
            }
        });

        f.pack();
        f.setVisible(true);

    }

    public static void main(String[] args) {
        new TestAnony();
    }
}
[java]
//简单的画图程序
//注意repaint()方法的使用
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class TestMyMouseAdater {
    public static void main(String[] args) {
        new MyFrame("Drawing ......");
    }
}

class MyFrame extends Frame {
    ArrayList<Point> points = null;
    MyFrame(String s) {
        super(s);
        points = new ArrayList<Point>();
        setLayout(null);
        setBounds(300, 300, 400, 400);
        setBackground(new Color(204, 204, 255));
        setVisible(true);
        this.addMouseListener(new Monitor());
        //this.addWindowListener(new MyWindowMonitor());

        //匿名类写法：
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                setVisible(true);
                System.exit(0);
            }
        });
    }

    //内部类
    /*class MyWindowMonitor extends WindowAdapter {
        public void windowClosing(WindowEvent e) {
            setVisible(false);
            System.exit(0);
        }
    }*/

    public void paint(Graphics g) {
        Iterator<Point> i = points.iterator();
        while(i.hasNext()) {
            Point p = i.next();
            g.setColor(Color.blue);
            g.fillOval(p.x, p.y, 10, 10);
        }
    }

    public void addPoint(Point p) {
        points.add(p);
    }
}

class Monitor extends MouseAdapter {
    public void mousePressed(MouseEvent e) {
        MyFrame f = (MyFrame)e.getSource();
        f.addPoint(new Point(e.getX(), e.getY()));
        f.repaint();
    }
}

摘自 Yours风之恋

补充：软件开发 , Java ,