java编写计算器

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * 计算器
 */
public class TestJsq {
    public static void main(String[] args) {
        MyFrame2 frame2 = new MyFrame2();
        WindowClose.close(frame2);
    }
}
//Frame
class MyFrame2 extends Frame {
    TextField num1;
    TextField num2;
    TextField num3;
    public MyFrame2(){
        //创建文本框对象
         num1 = new TextField(10);
         num2 = new TextField(10);
         num3 = new TextField(20);
        //创建按钮对象
        Button button = new Button("=");
        //监听按钮事件
        button.addActionListener(new MyListener());
        //添加标签对象
        Label label = new Label("+");

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        //流水排列
        setLayout(new FlowLayout());
        //setBounds(200,200,500,500);
        //自适应
        pack();
        //可视化
        setVisible(true);

    }
    //监听内部类
    private class MyListener implements ActionListener{

        @Override
        public void actionPerformed(ActionEvent e) {
            //获取文本内容，并强转为Integer类型，方便计算
            Integer n1 = Integer.parseInt(num1.getText());
            Integer n2 = Integer.parseInt(num2.getText());
            //将计算结果写入到文本框
            num3.setText(""+(n1+n2));
            //将运行完的文本框置为空
            num1.setText("");
            num2.setText("");

        }
    }
}