陈佳媛第一次提交

Calculator.java

@@ -0,0 +1,80 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
+import javax.script.ScriptException;
+
+public class Calculator extends JFrame implements ActionListener {
+    private JTextField display;
+    private StringBuilder input;
+
+    public Calculator() {
+        input = new StringBuilder();
+        display = new JTextField();
+        display.setEditable(false);
+        display.setFont(new Font("Arial", Font.BOLD, 32));
+        display.setHorizontalAlignment(JTextField.RIGHT);
+        display.setBackground(Color.LIGHT_GRAY);
+        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(4, 4, 10, 10));
+        panel.setBackground(Color.GRAY);
+
+        String[] buttons = {
+                "7", "8", "9", "/",
+                "4", "5", "6", "*",
+                "1", "2", "3", "-",
+                "C", "0", "=", "+"
+        };
+
+        for (String text : buttons) {
+            JButton button = new JButton(text);
+            button.setFont(new Font("Arial", Font.PLAIN, 24));
+            button.addActionListener(this);
+            button.setBackground(Color.WHITE);
+            panel.add(button);
+        }
+
+        add(display, BorderLayout.NORTH);
+        add(panel, BorderLayout.CENTER);
+
+        setTitle("Calculator");
+        setSize(400, 500);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+    }
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        String command = e.getActionCommand();
+
+        if (command.charAt(0) == 'C') {
+            input.setLength(0);
+            display.setText("");
+        } else if (command.charAt(0) == '=') {
+            try {
+                double result = evaluate(input.toString());
+                display.setText(String.valueOf(result));
+                input.setLength(0);
+            } catch (ScriptException ex) {
+                display.setText("Error");
+                input.setLength(0);
+            }
+        } else {
+            input.append(command);
+            display.setText(input.toString());
+        }
+    }
+
+    private double evaluate(String expression) throws ScriptException {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
+        return ((Number) engine.eval(expression)).doubleValue();
+    }
+//11122222
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            Calculator calculator = new Calculator();
+            calculator.setVisible(true);
+        });
+    }
+}

UML.iml

@@ -1,11 +0,0 @@
-<?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="jdk" jdkName="1.8" jdkType="JavaSDK" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

src/Calculator6218.java

@@ -1,200 +0,0 @@
-
-import javafx.application.Application;
-import javafx.geometry.Insets;
-import javafx.geometry.Pos;
-import javafx.scene.Scene;
-import javafx.scene.control.Button;
-import javafx.scene.control.TextField;
-import javafx.scene.layout.*;
-import javafx.stage.Stage;
-
-import java.util.Stack;
-
-public class Calculator6218 extends Application {
-    private TextField display;
-    private StringBuilder currentInput = new StringBuilder();
-
-    public static void main(String[] args) {
-        launch(args);
-    }
-
-    @Override
-    public void start(Stage primaryStage) {
-        VBox root = getRoot();
-        Scene scene = new Scene(root, 300, 400);
-        primaryStage.setTitle("计算器");
-        primaryStage.setScene(scene);
-        primaryStage.show();
-    }
-
-    private VBox getRoot() {
-        // 显示区域
-        display = new TextField("0");
-        display.setEditable(false);
-        display.setAlignment(Pos.CENTER_RIGHT);
-        display.setStyle("-fx-font-size: 24; -fx-background-color: #FFFFFF; -fx-border-color: #000000;");
-
-        // 按钮布局
-        GridPane buttonGrid = new GridPane();
-        buttonGrid.setPadding(new Insets(10));
-        buttonGrid.setHgap(10);
-        buttonGrid.setVgap(10);
-
-        // 创建按钮
-        String[] buttonLabels = {
-                "%", "CE", "C", "×",
-                "1/x", "x²", "√", "÷",
-                "7", "8", "9", "-",
-                "4", "5", "6", "+",
-                "1", "2", "3", "=",
-                "+/-", "0", "."
-        };
-
-        int index = 0;
-        for (int row = 0; row < 5; row++) {
-            for (int col = 0; col < 4; col++) {
-                Button button = new Button(buttonLabels[index]);
-                button.setMinSize(50, 50);
-                button.setOnAction(event -> handleButtonClick(button.getText()));
-                buttonGrid.add(button, col, row);
-                index++;
-            }
-        }
-
-        // 主布局
-        VBox root = new VBox(10);
-        root.setPadding(new Insets(20));
-        root.getChildren().addAll(display, buttonGrid);
-        return root;
-    }
-
-    private void handleButtonClick(String buttonText) {
-        // 处理按钮点击
-        switch (buttonText) {
-            case "C":
-                display.setText("0");
-                currentInput.setLength(0);
-                break;
-            case "CE":
-                currentInput.setLength(0);
-                display.setText("0");
-                break;
-            case "=":
-                try {
-                    double result = evaluateExpression(currentInput.toString());
-                    display.setText(String.valueOf(result));
-                    currentInput.setLength(0);
-                    currentInput.append(result);
-                } catch (Exception e) {
-                    display.setText("错误");
-                }
-                break;
-            case "+":
-            case "-":
-            case "×":
-            case "÷":
-            case "√":
-            case "x²":
-            case "1/x":
-                currentInput.append(convertOperator(buttonText));
-                display.setText(currentInput.toString());
-                break;
-            default:
-                currentInput.append(buttonText);
-                display.setText(currentInput.toString());
-                break;
-        }
-    }
-
-    private String convertOperator(String operator) {
-        switch (operator) {
-            case "×":
-                return "*";
-            case "÷":
-                return "/";
-            case "√":
-                return "Math.sqrt(";
-            case "x²":
-                return "^(2)";
-            case "1/x":
-                return "(1/(";
-            default:
-                return operator;
-        }
-    }
-
-    private double evaluateExpression(String expression) throws Exception {
-        // 使用简单的后缀表达式来评估表达式
-        String[] tokens = expression.split("(?<=[-+*/()])|(?=[-+*/()])");
-        Stack<Double> values = new Stack<>();
-        Stack<String> operations = new Stack<>();
-
-        for (String token : tokens) {
-            if (isNumeric(token)) {
-                values.push(Double.parseDouble(token));
-            } else if (isOperator(token)) {
-                while (!operations.isEmpty() && precedence(token) <= precedence(operations.peek())) {
-                    double b = values.pop();
-                    double a = values.pop();
-                    String op = operations.pop();
-                    values.push(applyOperation(a, b, op));
-                }
-                operations.push(token);
-            }
-        }
-
-        while (!operations.isEmpty()) {
-            double b = values.pop();
-            double a = values.pop();
-            String op = operations.pop();
-            values.push(applyOperation(a, b, op));
-        }
-
-        return values.pop();
-    }
-
-    private boolean isNumeric(String str) {
-        return str.matches("-?\\d+(\\.\\d+)?");
-    }
-
-    private boolean isOperator(String str) {
-        return str.equals("+") || str.equals("-") || str.equals("*") || str.equals("/") ||
-                str.equals("√") || str.equals("x²") || str.equals("1/x");
-    }
-
-    private int precedence(String operator) {
-        switch (operator) {
-            case "+": case "-":
-                return 1;
-            case "×": case "÷":
-                return 2;
-            case "√": case "x²":
-                return 3;
-            default:
-                return 0;
-        }
-    }
-
-    private double applyOperation(double a, double b, String operator) throws Exception {
-        switch (operator) {
-            case "+":
-                return a + b;
-            case "-":
-                return a - b;
-            case "*":
-                return a * b;
-            case "/":
-                if (b == 0) throw new Exception("除以零");
-                return a / b;
-            case "√":
-                return Math.sqrt(b);
-            case "x²":
-                return Math.pow(a, 2);
-            case "1/x":
-                if (a == 0) throw new Exception("除以零");
-                return 1 / a;
-            default:
-                return 0;
-        }
-    }
-}

src/Main.java

@@ -1,15 +0,0 @@
-//TIP 要<b>运行</b>代码，请按 <shortcut actionId="Run"/> 或
-// 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
-public class Main {
-    public static void main(String[] args) {
-        //TIP 当文本光标位于高亮显示的文本处时按 <shortcut actionId="ShowIntentionActions"/>
-        // 查看 IntelliJ IDEA 建议如何修正。
-        System.out.printf("Hello and welcome!");
-
-        for (int i = 1; i <= 5; i++) {
-            //TIP 按 <shortcut actionId="Debug"/> 开始调试代码。我们已经设置了一个 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 断点
-            // 但您始终可以通过按 <shortcut actionId="ToggleLineBreakpoint"/> 添加更多断点。
-            System.out.println("i = " + i);
-        }
-    }
-}