java基础案例11-2简易计算器

最新推荐文章于 2025-03-16 17:18:06 发布

qq_47661416

最新推荐文章于 2025-03-16 17:18:06 发布

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分类专栏： java黑马基础案例文章标签： java

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版权

package com.itheima;

import javax.swing. * ;
import java.awt.*;

public class Main{
    public static void main(String[] args){
        //容器
        JFrame frame = new JFrame("calculator");
        frame.setLayout(new FlowLayout(FlowLayout.LEADING, 30, 20));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(590, 500);
        frame.setLocation(400, 400);
        //文本框
        Font Ff = new Font("幼圆", Font.BOLD, 20);//字体大小
        JTextField input = new JTextField(30);
        input.setEditable(false);
        input.setFont(Ff);
        input.setPreferredSize(new Dimension(200, 50));//框的大小
        JPanel panel = new JPanel();
        panel.add(input);
        frame.add(panel);

        //清除按钮
        JButton btn = new JButton("Clear");
        Font F = new Font("幼圆", Font.BOLD, 30);
        btn.setFont(F);
        JPanel panel1 = new JPanel();
        btn.setPreferredSize((new Dimension(150, 50)));
        panel1.add(btn);
        frame.add(panel1);
        btn.addActionListener(e->{
            input.setText("");
        });

        //N个按钮
        Font f = new Font("幼圆", Font.BOLD, 20);//字体
        JButton btn1 = new JButton("7");
        btn1.setFont(f);
        btn1.setPreferredSize((new Dimension(127, 50)));
        JButton btn2 = new JButton("8");
        btn2.setFont(f);
        btn2.setPreferredSize((new Dimension(127, 50)));
        JButton btn3 = new JButton("9");