使用Java开发一个带有界面的计算器
时间: 2023-05-20 08:04:59 浏览: 92
好的,我可以为您提供一个使用Java开发的带有界面的计算器。以下是示例代码:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Calculator extends JFrame implements ActionListener {
private JTextField textField;
private JButton[] buttons;
private String[] buttonLabels = {"7", "8", "9", "/", "4", "5", "6", "*", "1", "2", "3", "-", "0", ".", "=", "+"};
private double num1, num2, result;
private char operator;
public Calculator() {
super("Calculator");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(300, 300);
setLayout(new BorderLayout());
textField = new JTextField();
add(textField, BorderLayout.NORTH);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(4, 4));
buttons = new JButton[16];
for (int i = 0; i < 16; i++) {
buttons[i] = new JButton(buttonLabels[i]);
buttons[i].addActionListener(this);
buttonPanel.add(buttons[i]);
}
add(buttonPanel, BorderLayout.CENTER);
setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String label = e.getActionCommand();
if (label.equals("C")) {
textField.setText("");
} else if (label.equals("+")) {
num1 = Double.parseDouble(textField.getText());
operator = '+';
textField.setText("");
} else if (label.equals("-")) {
num1 = Double.parseDouble(textField.getText());
operator = '-';
textField.setText("");
} else if (label.equals("*")) {
num1 = Double.parseDouble(textField.getText());
operator = '*';
textField.setText("");
} else if (label.equals("/")) {
num1 = Double.parseDouble(textField.getText());
operator = '/';
textField.setText("");
} else if (label.equals("=")) {
num2 = Double.parseDouble(textField.getText());
switch (operator) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
}
textField.setText(Double.toString(result));
} else {
textField.setText(textField.getText() + label);
}
}
public static void main(String[] args) {
new Calculator();
}
}