java例程练习（图像编程[Frame&Panel]）

//java的第一个图形界面程序
import java.awt.*;

public class TestFrame {

	public static void main(String[] args) {
		Frame f = new Frame();
		f.setLocation(20,20);
		f.setSize(500,500);
		f.setBackground(Color.red);
		f.setResizable(false);
		f.setVisible(true);
	}

}

//创建自己的图形类
//可以从Frame类继承
import java.awt.*;

public class TestMutiFrame {

	public static void main(String[] args) {
		new MyFrame(100,100,200,200,Color.blue);
		new MyFrame(300,100,200,200,Color.yellow);
		new MyFrame(100,300,200,200,Color.red);
		new MyFrame(300,300,200,200,Color.black);
	}

}

class MyFrame extends Frame {
	static int id = 0;
	MyFrame(int x, int y, int w, int h, Color c) {
		super("MyFrame " + (++id));
		setBackground(c);
		setLayout(null);
		setBounds(x, y, w, h);
		setVisible(true);
	}
}

//添加Panel
import java.awt.*;

public class TestPanel {
   public static void main(String[] args) {
   		Frame f = new Frame("Java Frame with Panel");
   		Panel p = new Panel(null);
   		f.setLayout(null);
   		f.setBounds(300, 300, 500, 500);
   		f.setBackground(new Color(0, 0, 102));
   		p.setBounds(50, 50, 400, 400);
   		p.setBackground(new Color(204, 204, 255));
   		f.add(p);
   		f.setVisible(true);
   }
}

//多个Panel
import java.awt.*;

public class TestMutiPanel {

   public static void main(String[] args) {
		new MyFrame2("MyFrameWithPanel",300,300,400,400);
   }
}

class MyFrame2 extends Frame {
	private Panel p1, p2, p3, p4;
	MyFrame2(String s, int x, int y, int w, int h) {
		super(s);
		setLayout(null);
		p1 = new Panel(null);
		p2 = new Panel(null);
		p3 = new Panel(null);
		p4 = new Panel(null);
		p1.setBounds(0, 0, w/2, h/2);
		p2.setBounds(0, h/2, w/2, h/2);
		p3.setBounds(w/2, 0, w/2, h/2);
		p4.setBounds(w/2, h/2, w/2, h/2);

		p1.setBackground(Color.blue);
		p2.setBackground(Color.green);
		p3.setBackground(Color.yellow);
		p4.setBackground(Color.magenta);
		add(p1);
		add(p2);
		add(p3);
		add(p4);
		setBounds(x, y, w, h);
		setVisible(true);
	}
}

import java.awt.*;

public class TestFramePanel {
	public static void main(String[] args) {
		new MFrame("呵呵", 200,100,600,400);
	}

}

class MFrame extends Frame {
	Panel p = null;

	MFrame(String s, int x, int y, int w, int h) {
		super(s);
		this.setBounds(x, y, w, h);
		this.setBackground(Color.blue);
		this.setLayout(null);

		p = new Panel(null);
		p.setBounds(w/3, h/3, w/3, h/3);
		p.setBackground(Color.yellow);

		this.add(p);
		this.setVisible(true);
	}

}