borderlayoutdemo.java

这一些程序都是实验之用

import java.awt.*;
import java.awt.event.*;
public class BorderLayoutDemo extends Frame{
		private final String names[]={"Hids North","Hids South","Hide East","Hide West","Hide Center"};
		private final String locations[]={BorderLayout.NORTH,BorderLayout.SOUTH,
		BorderLayout.EAST,BorderLayout.WEST,BorderLayout.CENTER};
		
		private Button[] buttons=new Button[5];
		
		public BorderLayoutDemo(String title){
				super(title);
				final BorderLayout layout=(BorderLayout)this.getLayout();
				ActionListener listener=new ActionListener(){
						public void actionPerformed(ActionEvent event){
							for(int i=0;i<buttons.length;i++)
								if(event.getSource()==buttons[i])
								  {	
								  	buttons[i].setVisible(false);
								  	locations[i]=locations[locations.length-i-1];
								  	layout.layoutContainer(BorderLayoutDemo.this);
								  	}
								else
								  { buttons[i].setVisible(true);
								   layout.layoutContainer(BorderLayoutDemo.this);
								   }
						}
				};
				for(int i=0;i<buttons.length;i++){
					buttons[i]=new Button(names[i]);
					buttons[i].addActionListener(listener);
					add(buttons[i],locations[i]);
					}
					setSize(250,250);
					setVisible(true);
					}
					public static void main(String args[])
						{
							new BorderLayoutDemo("Hello");
						}
}