test.java

这是我们上java课时自己编的几个测试小程序

/**
 * @(#)Test.java
 *
 *
 * @author 
 * @version 1.00 2007/11/18
 */
import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class Test extends Applet implements AdjustmentListener,ActionListener{

	Scrollbar red,green,blue;
	Button ok;
	Color color;
	Label r,g,b;
	public void init()
	{
		red = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
		green = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
		blue = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
		r=new Label("Red:");
		g=new Label("Green:");
		b=new Label("Blue:");
		ok = new Button("确定");

		setLayout(null);
	
		add(r);
		r.setBounds(10,10,40,20);
		add(red);
		red.setBounds(70,10,150,20);
		
		add(g);
		g.setBounds(240,10,40,20);
		add(green);
		green.setBounds(300,10,150,20);
		
		add(b);
		b.setBounds(10,50,40,20);
		add(blue);
		blue.setBounds(70,50,150,20);
		
		add(ok);
		ok.setBounds(300,50,70,25);
		
		red.addAdjustmentListener(this);
		green.addAdjustmentListener(this);
		blue.addAdjustmentListener(this);
		ok.addActionListener(this);
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		color = new Color(red.getValue(),green.getValue(),blue.getValue());
		setBackground(color);
		repaint();
	}
	
	public void adjustmentValueChanged(AdjustmentEvent ae)
	{
		color = new Color(red.getValue(),green.getValue(),blue.getValue());
		repaint();
	}
	
	public void paint(Graphics g)
	{
		g.setColor(color);
		g.fillRect(100,100,100,100);
	}
    
}