Gui:计算机（三版更新)

1.

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

//基础计算机
public class TestCalc {
    public static void main(String[] args) {
        new calculator();
    }
}
class calculator extends Frame{
    public Label num1;

    public calculator(){
        //文本框 2输入 1输出
        TextField textField1=new TextField(10);
        TextField textField2=new TextField(10);
        TextField textField3=new TextField(20);

        //1button
        Button button=new Button("=");
        button.addActionListener(new MyCalculatorListener(textField1,textField2,textField3));
        //  1 标签
        Label label=new Label("+");

        //布局
        setLayout(new FlowLayout());

        //有顺序哦！！！
        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);



        pack();
        setVisible(true);
    }
}
class MyCalculatorListener implements ActionListener{

    private TextField textField1,textField2,textField3;
    public MyCalculatorListener(TextField textField1,TextField textField2,TextField textField3) {
        this.textField1=textField1;
        this.textField2=textField2;
        this.textField3=textField3;
    }

    public MyCalculatorListener(Calcular calcular) {
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        int n1=Integer.parseInt(textField1.getText());
        int n2=Integer.parseInt(textField2.getText());
        //加一个“” 可以不用转换类型
        textField3.setText(""+(n1+n2));

        //clean
        textField1.setText("");
        textField2.setText("");
    }
}

2.

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

public class TestCalc2 {
    public static void main(String[] args) {
        new Calcular().loadFrame();
    }
}
class Calcular extends Frame{
static TextField num1;
    static TextField num2;
    static TextField num3;
    public void loadFrame() {
        num1=new TextField(10);
        num2=new TextField(10);
        num3=new TextField(20);

        //1button
        Button button=new Button("=");
        //  1 标签
        Label label=new Label("+");

        button.addActionListener(new MyCalculatorListener1(this));


        //布局
        setLayout(new FlowLayout());

        //有顺序哦！！！
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);



        pack();
        setVisible(true);
    }
}
class MyCalculatorListener1 implements ActionListener {

    calculator calculator=null;
    public MyCalculatorListener1(Calcular calcular) {
        this.calculator= calculator;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        int n1=Integer.parseInt(Calcular.num1.getText());
        int n2=Integer.parseInt(Calcular.num2.getText());
        //加一个“” 可以不用转换类型
        Calcular.num3.setText(""+(n1+n2));

        //clean
        Calcular.num1.setText("");
        Calcular.num2.setText("");
    }
}

3.

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

public class TestCalc3 {

        public static void main(String[] args) {
            new com.qing.lesson02.Calcular().loadFrame();
        }
    }
    class Calculator extends Frame {
        static TextField num1;
        static TextField num2;
        static TextField num3;
        public void loadFrame() {
            num1=new TextField(10);
            num2=new TextField(10);
            num3=new TextField(20);

            //1button
            Button button=new Button("=");
            //  1 标签
            Label label=new Label("+");

            button.addActionListener(new MyCalculatorListener2());


            //布局
            setLayout(new FlowLayout());

            //有顺序哦！！！
            add(num1);
            add(label);
            add(num2);
            add(button);
            add(num3);



            pack();
            setVisible(true);
        }
    //匿名内部类
 private   class MyCalculatorListener2 implements ActionListener {


        @Override
        public void actionPerformed(ActionEvent e) {
            int n1 = Integer.parseInt(com.qing.lesson02.Calcular.num1.getText());
            int n2 = Integer.parseInt(com.qing.lesson02.Calcular.num2.getText());
            //加一个“” 可以不用转换类型
            com.qing.lesson02.Calcular.num3.setText("" + (n1 + n2));

            //clean
            com.qing.lesson02.Calcular.num1.setText("");
            com.qing.lesson02.Calcular.num2.setText("");
        }

    }
}