class1.java

矩阵乘法的计算程序

import java.awt.*;
import java.awt.event.*;
class Handler implements ActionListener {
	Dialog d;
	public void actionPerformed(ActionEvent e){
		if (e.getActionCommand()=="打开对话框")
		  d.setVisible(true);
		else
		  d.setVisible(false);
		
	}
}
public class Class1
{
	public static void main (String[] args)
	{
		Frame f=new Frame();
		Handler h=new Handler();
		Dialog d=new Dialog(f,"Dialog",false);
		d.add("Center",new Label("Hello,I am a Dialog!"));
		d.setSize(100,100);
    	//d.pack();
		//d.setVisible(true);
		Button b1=new Button("打开对话框");
		Button b2=new Button("关闭对话框");
		f.add("North",b1);
		d.add("North",b2);
		h.d=d;
		b1.addActionListener(h);
		b2.addActionListener(h);
		f.setSize(200,100);
		f.show();
        
	
	}
}