cxy01

01/src/calculator/Calculator.java

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+package calculator;
+
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.layout.GridPane;
+import javafx.stage.Stage;
+
+public class Calculator extends Application {
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+
+    @Override
+    public void start(Stage primaryStage) {
+        primaryStage.setTitle("简单计算器");
+
+        try {
+            FXMLLoader loader = new FXMLLoader(getClass().getResource("CalculatorView.fxml"));
+            GridPane gridPane = loader.load();
+
+            Scene scene = new Scene(gridPane, 250, 250);
+            primaryStage.setScene(scene);
+            primaryStage.show();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

01/src/calculator/CalculatorController.java

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+package calculator;
+
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.TextField;
+
+public class CalculatorController {
+    @FXML
+    private TextField textField;
+
+    @FXML
+    public void handleButtonAction(javafx.event.ActionEvent event) {
+        Button button = (Button) event.getSource();
+        String buttonText = button.getText();
+
+        switch (buttonText) {
+            case "=":
+                calculateResult();
+                break;
+            case "C":
+                textField.clear();
+                break;
+            default:
+                appendToTextField(buttonText);
+                break;
+        }
+    }
+
+    private void appendToTextField(String value) {
+        textField.appendText(value);
+    }
+
+    private void calculateResult() {
+        String expression = textField.getText();
+        try {
+            double result = evaluate(expression);
+            textField.setText(String.valueOf(result));
+        } catch (Exception e) {
+            textField.setText("错误");
+        }
+    }
+
+    private double evaluate(String expression) {
+        String[] tokens = expression.split(" ");
+        double result = Double.parseDouble(tokens[0]);
+        for (int i = 1; i < tokens.length; i += 2) {
+            String operator = tokens[i];
+            double nextNumber = Double.parseDouble(tokens[i + 1]);
+            switch (operator) {
+                case "+":
+                    result += nextNumber;
+                    break;
+                case "-":
+                    result -= nextNumber;
+                    break;
+                case "*":
+                    result *= nextNumber;
+                    break;
+                case "/":
+                    if (nextNumber != 0) {
+                        result /= nextNumber;
+                    } else {
+                        throw new ArithmeticException("除数不能为零");
+                    }
+                    break;
+            }
+        }
+        return result;
+    }
+}

01/src/calculator/CalculatorView.fxml

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+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.TextField?>
+<?import javafx.scene.layout.GridPane?>
+
+<GridPane xmlns:fx="http://javafx.com/fxml"
+          fx:controller="calculator.CalculatorController"
+          alignment="center"
+          hgap="5" vgap="5"
+          padding="10"> <!-- 使用整数，确保不使用小数，与Insets相兼容 -->
+    <TextField fx:id="textField" editable="false" GridPane.columnSpan="4" prefHeight="50" />
+
+    <Button text="7" onAction="#handleButtonAction" />
+    <Button text="8" onAction="#handleButtonAction" />
+    <Button text="9" onAction="#handleButtonAction" />
+    <Button text="/" onAction="#handleButtonAction" />
+
+    <Button text="4" onAction="#handleButtonAction" />
+    <Button text="5" onAction="#handleButtonAction" />
+    <Button text="6" onAction="#handleButtonAction" />
+    <Button text="*" onAction="#handleButtonAction" />
+
+    <Button text="1" onAction="#handleButtonAction" />
+    <Button text="2" onAction="#handleButtonAction" />
+    <Button text="3" onAction="#handleButtonAction" />
+    <Button text="-" onAction="#handleButtonAction" />
+
+    <Button text="0" onAction="#handleButtonAction" />
+    <Button text="C" onAction="#handleButtonAction" />
+    <Button text="=" onAction="#handleButtonAction" />
+    <Button text="+" onAction="#handleButtonAction" />
+</GridPane>