写一个图形界面java计算器
时间: 2023-10-31 21:10:11 浏览: 47
好的,为您提供一个简单的图形界面Java计算器示例代码:
```java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JTextField inputField;
private JButton button0, button1, button2, button3, button4, button5, button6, button7, button8, button9;
private JButton buttonPlus, buttonMinus, buttonMultiply, buttonDivide, buttonClear, buttonEquals;
private double num1, num2, result;
private String operator;
public Calculator() {
setTitle("Calculator");
setSize(300, 250);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
inputField = new JTextField(20);
inputField.setHorizontalAlignment(JTextField.RIGHT);
inputField.setEditable(false);
JPanel buttonPanel = new JPanel(new GridLayout(4, 4));
button7 = new JButton("7");
button8 = new JButton("8");
button9 = new JButton("9");
buttonDivide = new JButton("/");
button4 = new JButton("4");
button5 = new JButton("5");
button6 = new JButton("6");
buttonMultiply = new JButton("*");
button1 = new JButton("1");
button2 = new JButton("2");
button3 = new JButton("3");
buttonMinus = new JButton("-");
button0 = new JButton("0");
buttonClear = new JButton("C");
buttonEquals = new JButton("=");
buttonPlus = new JButton("+");
buttonPanel.add(button7);
buttonPanel.add(button8);
buttonPanel.add(button9);
buttonPanel.add(buttonDivide);
buttonPanel.add(button4);
buttonPanel.add(button5);
buttonPanel.add(button6);
buttonPanel.add(buttonMultiply);
buttonPanel.add(button1);
buttonPanel.add(button2);
buttonPanel.add(button3);
buttonPanel.add(buttonMinus);
buttonPanel.add(button0);
buttonPanel.add(buttonClear);
buttonPanel.add(buttonEquals);
buttonPanel.add(buttonPlus);
button7.addActionListener(this);
button8.addActionListener(this);
button9.addActionListener(this);
buttonDivide.addActionListener(this);
button4.addActionListener(this);
button5.addActionListener(this);
button6.addActionListener(this);
buttonMultiply.addActionListener(this);
button1.addActionListener(this);
button2.addActionListener(this);
button3.addActionListener(this);
buttonMinus.addActionListener(this);
button0.addActionListener(this);
buttonClear.addActionListener(this);
buttonEquals.addActionListener(this);
buttonPlus.addActionListener(this);
setLayout(new BorderLayout());
add(inputField, BorderLayout.NORTH);
add(buttonPanel, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button1) {
inputField.setText(inputField.getText() + "1");
} else if (e.getSource() == button2) {
inputField.setText(inputField.getText() + "2");
} else if (e.getSource() == button3) {
inputField.setText(inputField.getText() + "3");
} else if (e.getSource() == button4) {
inputField.setText(inputField.getText() + "4");
} else if (e.getSource() == button5) {
inputField.setText(inputField.getText() + "5");
} else if (e.getSource() == button6) {
inputField.setText(inputField.getText() + "6");
} else if (e.getSource() == button7) {
inputField.setText(inputField.getText() + "7");
} else if (e.getSource() == button8) {
inputField.setText(inputField.getText() + "8");
} else if (e.getSource() == button9) {
inputField.setText(inputField.getText() + "9");
} else if (e.getSource() == button0) {
inputField.setText(inputField.getText() + "0");
} else if (e.getSource() == buttonPlus) {
num1 = Double.parseDouble(inputField.getText());
operator = "+";
inputField.setText("");
} else if (e.getSource() == buttonMinus) {
num1 = Double.parseDouble(inputField.getText());
operator = "-";
inputField.setText("");
} else if (e.getSource() == buttonMultiply) {
num1 = Double.parseDouble(inputField.getText());
operator = "*";
inputField.setText("");
} else if (e.getSource() == buttonDivide) {
num1 = Double.parseDouble(inputField.getText());
operator = "/";
inputField.setText("");
} else if (e.getSource() == buttonClear) {
inputField.setText("");
} else if (e.getSource() == buttonEquals) {
num2 = Double.parseDouble(inputField.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;
}
inputField.setText("" + result);
}
}
public static void main(String[] args) {
Calculator calculator = new Calculator();
calculator.setVisible(true);
}
}
```
该计算器界面包含数字按钮、运算符按钮和一个文本框,可以进行基本的加、减、乘、除运算。运算结果会显示在文本框中。运行该程序,即可看到计算器的图形界面。