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  • 十、设计一个计算器界面窗口

    一、代码

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

    import javax.swing.JButton;
    import javax.swing.JComboBox;
    import javax.swing.JFrame;

    class counter1 extends JFrame
    {
    public counter1()
    {
    super("计算器");
    this.setSize(400,100);
    this.setLocation(300,240);
    this.setLayout(new FlowLayout());
    TextField text1=new TextField(4);
    text1.setText("1");
    this.add(text1);

    String proList[] = { "+","-","x" ,"%"};
    TextField text;
    JComboBox comboBox;
    Container conPane = getContentPane();
    comboBox = new JComboBox(proList);
    comboBox.setEditable(true);
    conPane.add(comboBox);

    TextField text2=new TextField(4);
    text2.setText("1");
    this.add(text2);
    JButton button = new JButton("=");
    this.add(button);
    TextField text3=new TextField(4);
    text3.setText("2");

    button.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e)
    {
    String s=comboBox.getEditor().getItem().toString();
    double a= Integer.parseInt(text1.getText());
    double b= Integer.parseInt(text2.getText());
    if(s.equals("+")) {
    double t=a+b;
    String m=String.valueOf(t);

    text3.setText(m);
    }
    else if(s.equals("-"))
    {double t=a-b;
    String m=String.valueOf(t);

    text3.setText(m);}
    else if(s.equals("x"))
    {double t=a*b;
    String m=String.valueOf(t);

    text3.setText(m);}
    else
    {double t=a/b;
    String m=String.valueOf(t);

    text3.setText(m);}

    }});
    conPane.add(text3);
    this.setVisible(true);
    }

    }

    public class Counter {
    public static void main(String[] args)
    {
    new counter1();
    }
    }

    二、运行结果

    三、心得体会

    此次代码有些欠缺,未能实现更多的功能,前期有很多的问题,在同学的帮助下完成代码。

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  • 原文地址:https://www.cnblogs.com/zy2023/p/10968363.html
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