计算器的第二次代码

.gitignore

@@ -0,0 +1,29 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_22" default="true" project-jdk-name="22 (2)" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/double_team.iml" filepath="$PROJECT_DIR$/double_team.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

double_team.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/Main.java

@@ -0,0 +1,23 @@
+/**
+ * ClassName:${NAME}
+ * Package:
+ * Description:
+ * Author Pjj
+ *
+ * @Create 2024/10/10 16:14
+ * @Version 1.0
+ *///TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+        // to see how IntelliJ IDEA suggests fixing it.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+            System.out.println("i = " + i);
+        }
+    }
+}

src/compute/SimpleCalculator.java

@@ -1,6 +1,9 @@
 package compute;
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
 
 public class SimpleCalculator {
 
@@ -14,71 +17,71 @@ public class SimpleCalculator {
         frame = new JFrame("简单计算器");
         inputField = new JTextField();
         inputField.setEditable(false);
+        inputField.setFont(new Font("Arial", Font.PLAIN, 24));
+        inputField.setHorizontalAlignment(JTextField.RIGHT);
 
         // 创建按钮
-        JButton btn1 = new JButton("1");
-        JButton btn2 = new JButton("2");
-        JButton btn3 = new JButton("3");
-        JButton btn4 = new JButton("4");
-        JButton btn5 = new JButton("5");
-        JButton btn6 = new JButton("6");
-        JButton btn7 = new JButton("7");
-        JButton btn8 = new JButton("8");
-        JButton btn9 = new JButton("9");
-        JButton btn0 = new JButton("0");
-        JButton btnAdd = new JButton("+");
-        JButton btnSubtract = new JButton("-");
-        JButton btnMultiply = new JButton("*");
-        JButton btnDivide = new JButton("/");
-        JButton btnEqual = new JButton("=");
-        JButton btnClear = new JButton("C");
+        JButton[] buttons = new JButton[16];
+        String[] buttonLabels = {"7", "8", "9", "/",
+                "4", "5", "6", "*",
+                "1", "2", "3", "-",
+                "C", "0", "=", "+"};
+
+        for (int i = 0; i < buttonLabels.length; i++) {
+            buttons[i] = new JButton(buttonLabels[i]);
+            buttons[i].setFont(new Font("Arial", Font.PLAIN, 24));
+            buttons[i].setFocusable(false);
+            buttons[i].setBackground(Color.LIGHT_GRAY);
+            buttons[i].setBorder(BorderFactory.createLineBorder(Color.GRAY));
+            final String label = buttonLabels[i];
+            buttons[i].addActionListener(e -> handleButtonClick(label));
+        }
 
         // 设置布局
         JPanel panel = new JPanel();
-        panel.setLayout(new GridLayout(4, 4));
-        panel.add(btn7);
-        panel.add(btn8);
-        panel.add(btn9);
-        panel.add(btnDivide);
-        panel.add(btn4);
-        panel.add(btn5);
-        panel.add(btn6);
-        panel.add(btnMultiply);
-        panel.add(btn1);
-        panel.add(btn2);
-        panel.add(btn3);
-        panel.add(btnSubtract);
-        panel.add(btn0);
-        panel.add(btnEqual);
-        panel.add(btnClear);
-        panel.add(btnAdd);
-
-        // 添加事件监听器
-        btn1.addActionListener(e -> appendToInputField("1"));
-        btn2.addActionListener(e -> appendToInputField("2"));
-        btn3.addActionListener(e -> appendToInputField("3"));
-        btn4.addActionListener(e -> appendToInputField("4"));
-        btn5.addActionListener(e -> appendToInputField("5"));
-        btn6.addActionListener(e -> appendToInputField("6"));
-        btn7.addActionListener(e -> appendToInputField("7"));
-        btn8.addActionListener(e -> appendToInputField("8"));
-        btn9.addActionListener(e -> appendToInputField("9"));
-        btn0.addActionListener(e -> appendToInputField("0"));
-
-        btnAdd.addActionListener(e -> setOperator("+"));
-        btnSubtract.addActionListener(e -> setOperator("-"));
-        btnMultiply.addActionListener(e -> setOperator("*"));
-        btnDivide.addActionListener(e -> setOperator("/"));
-
-        btnEqual.addActionListener(e -> calculateResult());
-        btnClear.addActionListener(e -> clearInput());
+        panel.setLayout(new GridLayout(4, 4, 10, 10));
+        for (JButton button : buttons) {
+            panel.add(button);
+        }
 
         // 设置窗体
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setSize(400, 400);
+        frame.setLayout(new BorderLayout());
         frame.add(inputField, BorderLayout.NORTH);
-        frame.add(panel);
+        frame.add(panel, BorderLayout.CENTER);
         frame.setVisible(true);
+        frame.setLocationRelativeTo(null); // 窗口居中
+        frame.addKeyListener(new KeyAdapter() { // 支持键盘输入
+            @Override
+            public void keyPressed(KeyEvent e) {
+                char keyChar = e.getKeyChar();
+                if (Character.isDigit(keyChar) || keyChar == '.' || "+-*/=".indexOf(keyChar) >= 0) {
+                    handleButtonClick(String.valueOf(keyChar));
+                }
+                if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
+                    clearInput();
+                }
+            }
+        });
+    }
+
+    private void handleButtonClick(String label) {
+        switch (label) {
+            case "C":
+                clearInput();
+                break;
+            case "=":
+                calculateResult();
+                break;
+            default:
+                if ("+-*/".contains(label)) {
+                    setOperator(label);
+                } else {
+                    appendToInputField(label);
+                }
+                break;
+        }
     }
 
     private void appendToInputField(String value) {
@@ -92,33 +95,39 @@ public class SimpleCalculator {
     }
 
     private void calculateResult() {
-        num2 = Double.parseDouble(inputField.getText());
-        double result = 0;
+        try {
+            num2 = Double.parseDouble(inputField.getText());
+            double result = 0;
 
-        switch (operator) {
-            case "+":
-                result = num1 + num2;
-                break;
-            case "-":
-                result = num1 - num2;
-                break;
-            case "*":
-                result = num1 * num2;
-                break;
-            case "/":
-                if (num2 != 0) {
-                    result = num1 / num2;
-                } else {
-                    JOptionPane.showMessageDialog(frame, "错误：除数不能为零。");
-                    return;
-                }
-                break;
+            switch (operator) {
+                case "+":
+                    result = num1 + num2;
+                    break;
+                case "-":
+                    result = num1 - num2;
+                    break;
+                case "*":
+                    result = num1 * num2;
+                    break;
+                case "/":
+                    if (num2 != 0) {
+                        result = num1 / num2;
+                    } else {
+                        JOptionPane.showMessageDialog(frame, "错误：除数不能为零。");
+                        return;
+                    }
+                    break;
+            }
+            inputField.setText(String.valueOf(result));
+        } catch (NumberFormatException e) {
+            JOptionPane.showMessageDialog(frame, "无效输入，请检查。");
         }
-        inputField.setText(String.valueOf(result));
     }
 
     private void clearInput() {
         inputField.setText("");
+        num1 = num2 = 0;
+        operator = "";
     }
 
     public static void main(String[] args) {