用JAVA编写一个带窗口的简单计算机
时间: 2023-05-27 13:07:53 浏览: 56
很高兴能为您提供帮助!以下是一个简单的带窗口的计算器的JAVA代码:
```
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends JFrame implements ActionListener {
// 创建计算器窗口
private JPanel panel;
private JTextField textField;
private JButton button0, button1, button2, button3, button4, button5, button6, button7, button8, button9;
private JButton buttonAdd, buttonSub, buttonMul, buttonDiv, buttonEqual, buttonClear;
private double num1, num2, result;
private String operator;
// 构造函数
public Calculator() {
setTitle("Calculator");
setSize(240, 250);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
panel = new JPanel();
panel.setLayout(new GridLayout(5, 4));
textField = new JTextField();
textField.setEditable(false);
button0 = new JButton("0");
button1 = new JButton("1");
button2 = new JButton("2");
button3 = new JButton("3");
button4 = new JButton("4");
button5 = new JButton("5");
button6 = new JButton("6");
button7 = new JButton("7");
button8 = new JButton("8");
button9 = new JButton("9");
buttonAdd = new JButton("+");
buttonSub = new JButton("-");
buttonMul = new JButton("*");
buttonDiv = new JButton("/");
buttonEqual = new JButton("=");
buttonClear = new JButton("C");
button0.addActionListener(this);
button1.addActionListener(this);
button2.addActionListener(this);
button3.addActionListener(this);
button4.addActionListener(this);
button5.addActionListener(this);
button6.addActionListener(this);
button7.addActionListener(this);
button8.addActionListener(this);
button9.addActionListener(this);
buttonAdd.addActionListener(this);
buttonSub.addActionListener(this);
buttonMul.addActionListener(this);
buttonDiv.addActionListener(this);
buttonEqual.addActionListener(this);
buttonClear.addActionListener(this);
panel.add(textField);
panel.add(buttonClear);
panel.add(buttonDiv);
panel.add(buttonMul);
panel.add(button7);
panel.add(button8);
panel.add(button9);
panel.add(buttonSub);
panel.add(button4);
panel.add(button5);
panel.add(button6);
panel.add(buttonAdd);
panel.add(button1);
panel.add(button2);
panel.add(button3);
panel.add(buttonEqual);
panel.add(button0);
add(panel);
setVisible(true);
}
// 处理按钮事件
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button0) {
textField.setText(textField.getText() + "0");
} else if (e.getSource() == button1) {
textField.setText(textField.getText() + "1");
} else if (e.getSource() == button2) {
textField.setText(textField.getText() + "2");
} else if (e.getSource() == button3) {
textField.setText(textField.getText() + "3");
} else if (e.getSource() == button4) {
textField.setText(textField.getText() + "4");
} else if (e.getSource() == button5) {
textField.setText(textField.getText() + "5");
} else if (e.getSource() == button6) {
textField.setText(textField.getText() + "6");
} else if (e.getSource() == button7) {
textField.setText(textField.getText() + "7");
} else if (e.getSource() == button8) {
textField.setText(textField.getText() + "8");
} else if (e.getSource() == button9) {
textField.setText(textField.getText() + "9");
} else if (e.getSource() == buttonAdd) {
num1 = Double.parseDouble(textField.getText());
operator = "+";
textField.setText("");
} else if (e.getSource() == buttonSub) {
num1 = Double.parseDouble(textField.getText());
operator = "-";
textField.setText("");
} else if (e.getSource() == buttonMul) {
num1 = Double.parseDouble(textField.getText());
operator = "*";
textField.setText("");
} else if (e.getSource() == buttonDiv) {
num1 = Double.parseDouble(textField.getText());
operator = "/";
textField.setText("");
} else if (e.getSource() == buttonEqual) {
num2 = Double.parseDouble(textField.getText());
if (operator.equals("+")) {
result = num1 + num2;
} else if (operator.equals("-")) {
result = num1 - num2;
} else if (operator.equals("*")) {
result = num1 * num2;
} else if (operator.equals("/")) {
result = num1 / num2;
}
textField.setText("" + result);
} else if (e.getSource() == buttonClear) {
textField.setText("");
}
}
public static void main(String[] args) {
Calculator calculator = new Calculator();
}
}
```
运行代码后,将会出现一个简单的计算器窗口,支持加、减、乘、除四个基本运算,以及清空和等于两个按钮。用户可以在窗口中输入数字,选择运算符,执行计算,并在窗口中显示结果。