import java.awt.*;
public class TestFlowLayout {
	public static void main(String[] args) {
		Frame f = new Frame("Flow Layout");
		Button button1 = new Button("OK");
		Button button2 = new Button("Open");
		Button button3 = new Button("Close");
		f.setLayout(new FlowLayout());
		f.add(button1);
		f.add(button2);
		f.add(button3);
		f.setSize(100,100);
		f.setVisible(true);
	}
}

public class TestBorderLayout {
	public static void main(String[] args) {
		Frame f;
		f = new Frame("Border Layout");
		Button bn = new Button("BN");
		Button bs = new Button("BS");
		Button bw = new Button("BW");
		Button be = new Button("BE");
		Button bc = new Button("BC");
		f.add(bn , "North");
		f.add(bs , "South");
		f.add(bw , "West");
		f.add(be , "East");
		f.add(bc , "Center");
		//也可使用下述语句
		/*
		f.add(bn , BorderLayout.NORTH);
		f.add(bs , BorderLayout.SOUTH);
		f.add(bw , BorderLayout.WEST);
		f.add(be , BorderLayout.EAST);
		f.add(bc , BorderLayout.CENTER);
		*/
		f.setSize(200,200);
		f.setVisible(true);
	}
}

import java.awt.*;
import java.awt.event.*;
public class TestActionEvent {
	public static void main(String[] args) {
		Frame f = new Frame("Test");
		Button b = new Button("Press me!");
		Monitor bh = new Monitor();
		b.addActionListener(bh);
		f.add(b,BorderLayout.CENTER);
		f.pack();
		f.setVisible(true);
	}
}
class Monitor implements ActionListener {
	public void actionPerformed(ActionEvent e) {
		System.out.println("a button has been pressed");
	}
}

import java.awt.*;
import java.awt.event.*;
public class TFActionEvent {
	public static void main(String[] args) {
		new TFFrame();
	}
}
class TFFrame extends Frame {
	TFFrame() {
		TextField tf = new TextField();
		add(tf);
		tf.addActionListener(new TFActionListener());
		pack();
		setVisible(true);
	}
}
class TFActionListener implements ActionListener {
	public void actionPerformed(ActionEvent e) {
		TextField tf = (TextField)e.getSource();
		System.out.println(tf.getText());
		tf.setText("");
	}
}
TFPassword.java //密码
import java.awt.*;
import java.awt.event.*;
public class TFPassword {
	public static void main(String[] args) {
		new TFFrame2();
	}
}
class TFFrame2 extends Frame {
	TFFrame2() {
		TextField tf = new TextField();
		add(tf);
		tf.addActionListener(new TFActionListener2());
		tf.setEchoChar('*');
		pack();
		setVisible(true);
	}
}
class TFActionListener2 implements ActionListener {
	public void actionPerformed(ActionEvent e) {
		TextField tf = (TextField)e.getSource();
		System.out.println(tf.getText());
		tf.setText("");
	}
}

import java.awt.*;
import java.awt.event.*;
public class TFMath {
	public static void main(String[] args) {
		new TFFrame().launchFrame();
	}
}
class TFFrame extends Frame {
	TextField[] num = new TextField[3];
	public void launchFrame() {
		for(int i=0;i<3;i++) 
			num[i] = new TextField(10);
			Label lblPlus = new Label("+");
			Button btnEqual = new Button("=");
			btnEqual.addActionListener(new MyMonitor(this));
			setLayout(new FlowLayout());
			add(num[0]); add(lblPlus);
			add(num[1]); add(btnEqual);
			add(num[2]);
			pack();
			setVisible(true);
	}
}
class MyMonitor implements ActionListener {
	TFFrame tf = null;
	public MyMonitor(TFFrame tf) {this.tf = tf;}
	public void actionPerformed(ActionEvent e) {
		int n0 = Integer.parseInt(tf.num[0].getText());
		int n1 = Integer.parseInt(tf.num[1].getText());
		tf.num[2].setText(""+(n0+n1));
	}
}

import java.awt.*;
import java.awt.event.*;
public class TFMath {
	public static void main(String[] args) {
		new TFFrame().launchFrame();
	}
}
class TFFrame extends Frame {
	TextField[] num = new TextField[3];
	public void launchFrame() {
		for(int i=0;i<3;i++) 
			num[i] = new TextField(10);
			Label lblPlus = new Label("+");
			Button btnEqual = new Button("=");
			btnEqual.addActionListener(new MyMonitor());
			setLayout(new FlowLayout());
			add(num[0]); add(lblPlus);
			add(num[1]); add(btnEqual);
			add(num[2]);
			pack();
			setVisible(true);
	}
	class MyMonitor implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			int n0 = Integer.parseInt(num[0].getText());
			int n1 = Integer.parseInt(num[1].getText());
			num[2].setText(""+(n0+n1));
		}
	}
}

import java.awt.*;
public class TestPaint {
	public static void main(String[] args) {
		new PaintFrame().launchFrame();
	}
}
class PaintFrame extends Frame {
	public void launchFrame() {
		setBounds(200,200,640,480);
		setVisible(true);
	}
	public void paint(Graphics g) {
		Color c = g.getColor();
		g.setColor(Color.red);
		g.fillOval(50,50,30,30);
		g.setColor(Color.green);
		g.fillRect(80,80,40,40);
		g.setColor(c);
	}
}

import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class MyMouseAdapter {
	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(300,300,400,300);
		this.setBackground(new Color(204,204,255));
		setVisible(true);
		this.addMouseListener(new Monitor());
	}
	public void paint(Graphics g) {
		Iterator i = points.iterator();
		while(i.hasNext()) {
			Point p = (Point)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();
	}
}

import java.awt.*;
import java.awt.event.*;
public class TestAnoymous {
	Frame f = new Frame("Test");
	TextField tf = new TextField(10);
	Button b1 = new Button("Start");
	public TestAnoymous() {
		f.add(b1 , "North");
		f.add(tf , "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) {
				System.exit(0);
			}
		});
		f.pack();
		f.setVisible(true);
	}
	public static void main(String[] args) {
		new TestAnoymous();
	}
}

Java总结之GUI编程