jisuanqi.java

在面板中建立菜单项

import java.awt.*;

public class jisuanqi extends Frame
{

	public jisuanqi(){
		setLayout(new BorderLayout());
		Panel p1=new Panel();
		TextField text1=new TextField("               ");
		p1.add(text1);
		add("North",p1);
		Panel p2=new Panel();
   	p2.setLayout(new GridLayout(4,4));
	p2.add(new Button("1"));
	p2.add(new Button("2"));
	p2.add(new Button("3"));
	p2.add(new Button("4"));
	p2.add(new Button("5"));
	p2.add(new Button("6"));
	p2.add(new Button("7"));
	p2.add(new Button("8"));
	p2.add(new Button("9"));
	p2.add(new Button("0"));
	p2.add(new Button("+"));
	p2.add(new Button("-"));
	p2.add(new Button("*"));
	p2.add(new Button("/"));
	p2.add(new Button("."));
	p2.add(new Button("AC"));
	add("Center",p2);
	}
	public static void main(String args[])
	{
		jisuanqi window=new jisuanqi();
		window.setTitle("计算器");
		window.pack();
		window.show();
	}
}