控制器和启动

Calculator.java

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+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
+public class Calculator extends Application {
+
+    @Override
+    public void start(Stage primaryStage) throws IOException {
+        // 加载FXML文件
+        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/CalculatorView.fxml"));
+        Parent root = fxmlLoader.load();
+
+        Scene scene = new Scene(root, 600, 500);
+        primaryStage.setTitle("计算器");
+        primaryStage.setScene(scene);
+        primaryStage.show();
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}

CalculatorControl.java

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+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.TextArea;
+
+public class CalculatorControl {
+
+    @FXML
+    private TextArea display;
+
+    private double firstNumber;
+    private double secondNumber;
+    private String operation;
+    private boolean awaitingSecondNumber;
+
+    @FXML
+    void onClearButtonClicked(ActionEvent event) {
+        display.clear();
+        firstNumber = 0;
+        secondNumber = 0;
+        operation = null;
+        awaitingSecondNumber = false;
+    }
+
+    @FXML
+    void onClearEntryButtonClicked(ActionEvent event) {
+        display.clear();
+    }
+
+    @FXML
+    void onDeleteButtonClicked(ActionEvent event) {
+        String currentText = display.getText();
+        if (currentText != null && !currentText.isEmpty()) {
+            display.setText(currentText.substring(0, currentText.length() - 1));
+        }
+    }
+
+    @FXML
+    void onEqualsButtonClicked(ActionEvent event) {
+        if (awaitingSecondNumber) {
+            String displayText = display.getText();
+            String[] parts = displayText.split(" ");
+            try {
+                secondNumber = Double.parseDouble(parts[parts.length - 1]);
+                switch (operation) {
+                    case "+":
+                        display.setText(firstNumber + " + " + secondNumber + " = " + (firstNumber + secondNumber));
+                        break;
+                    case "-":
+                        display.setText(firstNumber + " - " + secondNumber + " = " + (firstNumber - secondNumber));
+                        break;
+                    case "*":
+                        display.setText(firstNumber + " * " + secondNumber + " = " + (firstNumber * secondNumber));
+                        break;
+                    case "/":
+                        if (secondNumber == 0) {
+                            display.setText("Error");
+                        } else {
+                            display.setText(firstNumber + " / " + secondNumber + " = " + (firstNumber / secondNumber));
+                        }
+                        break;
+                    case "%":
+                        display.setText(firstNumber + " % " + secondNumber + " = " + (firstNumber % secondNumber));
+                        break;
+                }
+                awaitingSecondNumber = false;
+            } catch (NumberFormatException e) {
+                display.setText("Error");
+            }
+        }
+    }
+
+    @FXML
+    void onNumberButtonClicked(ActionEvent event) {
+        Button button = (Button) event.getSource();
+        String buttonText = button.getText();
+        display.appendText(buttonText);
+    }
+
+    @FXML
+    void onOperationButtonClicked(ActionEvent event) {
+        Button button = (Button) event.getSource();
+        String buttonText = button.getText();
+        if (!awaitingSecondNumber) {
+            String displayText = display.getText();
+            String[] parts = displayText.split(" ");
+            try {
+                firstNumber = Double.parseDouble(parts[parts.length - 1]);
+                operation = buttonText;
+                awaitingSecondNumber = true;
+                display.appendText(" " + buttonText + " ");
+            } catch (NumberFormatException e) {
+                display.setText("Error");
+            }
+        }
+    }
+}