v0

Calculator.java

@@ -0,0 +1,98 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class Calculator extends JFrame implements ActionListener {
+    private JTextField textField;
+    private double num1, num2, result;
+    private String operator;
+
+    public Calculator() {
+        // 设置窗口基本属性
+        setTitle("计算器");
+        setSize(400, 600);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLayout(new BorderLayout());
+
+        // 创建文本框
+        textField = new JTextField();
+        textField.setFont(new Font("Arial", Font.PLAIN, 24));
+        add(textField, BorderLayout.NORTH);
+
+        // 创建按钮面板
+        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(5, 4, 10, 10));
+        String[] buttonLabels = {
+                "7", "8", "9", "/",
+                "4", "5", "6", "*",
+                "1", "2", "3", "-",
+                "0", "C", "=", "+",
+                "%", "(", ")", ""
+        };
+
+        for (String label : buttonLabels) {
+            JButton button = new JButton(label);
+            button.setFont(new Font("Arial", Font.PLAIN, 24));
+            button.addActionListener(this);
+            panel.add(button);
+        }
+
+        add(panel, BorderLayout.CENTER);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        String command = e.getActionCommand();
+
+        switch (command) {
+            case "C":
+                textField.setText("");
+                break;
+            case "=":
+                num2 = Double.parseDouble(textField.getText());
+                switch (operator) {
+                    case "+":
+                        result = num1 + num2;
+                        break;
+                    case "-":
+                        result = num1 - num2;
+                        break;
+                    case "*":
+                        result = num1 * num2;
+                        break;
+                    case "/":
+                        if (num2 == 0) {
+                            textField.setText("错误: 除以零");
+                            return;
+                        }
+                        result = num1 / num2;
+                        break;
+                    case "%":
+                        result = num1 % num2;
+                        break;
+                }
+                textField.setText(String.valueOf(result));
+                break;
+            case "+":
+            case "-":
+            case "*":
+            case "/":
+            case "%":
+                num1 = Double.parseDouble(textField.getText());
+                operator = command;
+                textField.setText("");
+                break;
+            default:
+                textField.setText(textField.getText() + command);
+                break;
+        }
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            Calculator calculator = new Calculator();
+            calculator.setVisible(true);
+        });
+    }
+}