javaGUI实现计算器的界面

import java.awt.*;
import javax.swing.*;
public class GridLayout_Exam {

	public static void main(String[] args) {
		//创建字符串数组，用于·保存计算器的各个操作数和操作符
		String[] name={"7","8","9","*","单位","4","5","6","/","M+","1","2","3","+","M-","0","00",".","-","="};
		//创建计算器窗口
		JFrame f=new JFrame("caculator");
		//设置窗口的位置居中
		f.setLocationRelativeTo(null);
		f.setSize(250, 300);
		//设置窗口的大小不可修改
		f.setResizable(false);
		//创建面板
		JPanel p=new JPanel(null);
		//创建网格布局管路器对象，4行4列
		GridLayout grid=new GridLayout(4,4);
		//设置面板的布局管理器为网格布局管路器
		p.setLayout(grid);
		//设置面板在窗口的位置和大小
		p.setBounds(20,45,200,200);
		//将各个按钮添加到面板上
        for(int i=0;i