flowlayoutdemo.java

关于在JAVA中学习流式布局管理器的简单小应用程序

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*<applet code="FlowLayoutDemo" width=250 height=200>
</applet>*/
public abstract class FlowLayoutDemo extends Applet implements ItemListener
{
	String msg="";
	Checkbox Win98,WinNT,Linux,mac;
	public void init()
	{
      setLayout(new FlowLayout(FlowLayout.LEFT));
	  Win98=new Checkbox("Win98",null,true);
	  WinNT=new Checkbox("WinNT/2000");
	  Linux=new Checkbox("Linux/Unix");
	  mac=new Checkbox("MacOS");
	  add(Win98);
	  add(WinNT);
	  add(Linux);
	  add(mac);
	  Win98.addItemListener(this);
	  WinNT.addItemListener(this);
	  Linux.addItemListener(this);
	  mac.addItemListener(this);
}
public void ItemStateChanged(ItemEvent ie)
{
	repaint();
}
public void paint(Graphics g)
{
	msg="current state:";
	g.drawString(msg,6,80);
	msg="Window98:"+Win98.getState();
	g.drawString(msg,6,100);
	msg="WindowNT/2000"+WinNT.getState();
	g.drawString(msg,6,120);
	msg="Linux/Unix:"+Linux.getState();
	g.drawString(msg,6,140);
	msg="MacOS"+mac.getState();
	g.drawString(msg,6,160);
}
}