testgridlayout.java

Java语言

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class TestGridLayout extends Applet implements ActionListener{
	Button btn[]=new Button[9];
	String btn_name[]=new String[9];
	Panel p=new Panel();
	boolean bool=true;
	public void actionPerformed(ActionEvent e){
		if(bool)
			p.setLayout(new GridLayout(3,3,5,5));
		else
			p.setLayout(new GridLayout(4,3,5,5));
		bool=!bool;
		p.validate();
	}
	public void init(){
		p.setLayout(new GridLayout(3,3,5,5));
		p.setBackground(Color.red);
		for(int i=0;i<btn_name.length;i++){
			btn_name[i]="Button"+(i+1);}
		for(int i=0;i<btn.length;i++){
			btn[i]=new Button(btn_name[i]);
			btn[i].addActionListener(this);
			p.add(btn[i]);
		}
		add(p);
	}
}