带界面的java 科学计算器代码

以下是一个带界面的 Java 科学计算器代码，使用了 JavaFX 框架：

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.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import java.lang.Math;

public class Calculator extends Application {
    private TextField num1Input;
    private TextField num2Input;
    private Label resultLabel;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Scientific Calculator");

        // Create input fields for numbers
        num1Input = new TextField();
        num2Input = new TextField();

        // Create buttons for arithmetic operations
        Button addBtn = new Button("+");
        addBtn.setOnAction(e -> add());
        Button subtractBtn = new Button("-");
        subtractBtn.setOnAction(e -> subtract());
        Button multiplyBtn = new Button("*");
        multiplyBtn.setOnAction(e -> multiply());
        Button divideBtn = new Button("/");
        divideBtn.setOnAction(e -> divide());

        // Create buttons for trigonometric functions
        Button sinBtn = new Button("sin");
        sinBtn.setOnAction(e -> sin());
        Button cosBtn = new Button("cos");
        cosBtn.setOnAction(e -> cos());
        Button tanBtn = new Button("tan");
        tanBtn.setOnAction(e -> tan());

        // Create button to clear input fields
        Button clearBtn = new Button("Clear");
        clearBtn.setOnAction(e -> clear());

        // Create label to display result
        resultLabel = new Label();
        resultLabel.setFont(new Font("Arial", 20));

        // Create grid pane to hold input fields and arithmetic operation buttons
        GridPane gridPane = new GridPane();
        gridPane.setAlignment(Pos.CENTER);
        gridPane.setHgap(10);
        gridPane.setVgap(10);
        gridPane.add(new Label("Number 1:"), 0, 0);
        gridPane.add(num1Input, 1, 0);
        gridPane.add(new Label("Number 2:"), 0, 1);
        gridPane.add(num2Input, 1, 1);
        gridPane.add(addBtn, 0, 2);
        gridPane.add(subtractBtn, 1, 2);
        gridPane.add(multiplyBtn, 0, 3);
        gridPane.add(divideBtn, 1, 3);

        // Create HBox to hold trigonometric function buttons
        HBox trigBox = new HBox(10);
        trigBox.setAlignment(Pos.CENTER);
        trigBox.getChildren().addAll(sinBtn, cosBtn, tanBtn);

        // Create VBox to hold all UI elements
        VBox vbox = new VBox(10);
        vbox.setAlignment(Pos.CENTER);
        vbox.setPadding(new Insets(10));
        vbox.getChildren().addAll(gridPane, trigBox, resultLabel, clearBtn);

        // Create scene and show stage
        Scene scene = new Scene(vbox, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void add() {
        double num1 = Double.parseDouble(num1Input.getText());
        double num2 = Double.parseDouble(num2Input.getText());
        double result = num1 + num2;
        resultLabel.setText("Result: " + result);
    }

    private void subtract() {
        double num1 = Double.parseDouble(num1Input.getText());
        double num2 = Double.parseDouble(num2Input.getText());
        double result = num1 - num2;
        resultLabel.setText("Result: " + result);
    }

    private void multiply() {
        double num1 = Double.parseDouble(num1Input.getText());
        double num2 = Double.parseDouble(num2Input.getText());
        double result = num1 * num2;
        resultLabel.setText("Result: " + result);
    }

    private void divide() {
        double num1 = Double.parseDouble(num1Input.getText());
        double num2 = Double.parseDouble(num2Input.getText());
        double result = num1 / num2;
        resultLabel.setText("Result: " + result);
    }

    private void sin() {
        double num1 = Double.parseDouble(num1Input.getText());
        double result = Math.sin(num1);
        resultLabel.setText("Result: " + result);
    }

    private void cos() {
        double num1 = Double.parseDouble(num1Input.getText());
        double result = Math.cos(num1);
        resultLabel.setText("Result: " + result);
    }

    private void tan() {
        double num1 = Double.parseDouble(num1Input.getText());
        double result = Math.tan(num1);
        resultLabel.setText("Result: " + result);
    }

    private void clear() {
        num1Input.clear();
        num2Input.clear();
        resultLabel.setText("");
    }
}

该代码使用了 JavaFX 框架创建了一个简单的用户界面，包括输入数字的文本框、算术运算和三角函数的按钮、显示结果的标签以及清空输入的按钮。通过调用相应的方法来处理用户的输入和按钮点击事件，并将结果显示在标签中。