zjzh/test2.java

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class test2 extends Application {
    @Override
    public void start(Stage primaryStage) {
        // 创建VBox作为垂直布局容器
        VBox vBox = new VBox(10.0);

        // 创建提示标签
        Label promptLabel = new Label("请输入一个数字");
        promptLabel.setStyle("-fx-font-weight: bold;");

        // 创建输入框并设置提示文本
        TextField inputField = new TextField();
        inputField.setPromptText("输入数字");

        // 创建输入框并设置提示文本
        TextField fromBaseField = new TextField();
        fromBaseField.setPromptText("输入原始进制");

        // 创建输入框并设置提示文本
        TextField toBaseField = new TextField();
        toBaseField.setPromptText("输入目标进制");

        // 创建标签用于显示转换结果
        Label resultLabel = new Label();

        // 创建按钮
        Button convertButton = new Button("转换");

        // 更新标签的函数
        final TextField finalInputField = inputField;
        final TextField finalFromBaseField = fromBaseField;
        final TextField finalToBaseField = toBaseField;

        convertButton.setOnAction(e -> {
            try {
                String inputText = finalInputField.getText();
                int fromBase = Integer.parseInt(finalFromBaseField.getText());
                int toBase = Integer.parseInt(finalToBaseField.getText());

                // 将输入的数字从原始进制转换为十进制
                int decimalNumber = Integer.parseInt(inputText, fromBase);

                // 将十进制数字转换为目标进制
                String result = toBaseString(decimalNumber, toBase);

                resultLabel.setText(String.format("%d 进制: %s", toBase, result));
            } catch (NumberFormatException ex) {
                Alert alert = new Alert(Alert.AlertType.ERROR);
                alert.setTitle("输入错误");
                alert.setHeaderText("无效输入");
                alert.setContentText("请输入有效的数字和进制。");
                alert.showAndWait();
            }
        });

        // 将组件添加到布局中
        vBox.getChildren().addAll(promptLabel, inputField, fromBaseField, toBaseField, convertButton, resultLabel);

        // 设置场景和舞台
        Scene scene = new Scene(vBox, 300.0, 200.0);
        primaryStage.setTitle("进制转换器");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    // 将十进制数转换为指定进制的字符串
    private String toBaseString(int number, int base) {
        if (number == 0) {
            return "0";
        } else {
            StringBuilder sb = new StringBuilder();
            char[] digits = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
            boolean isNegative = number < 0;
            if (isNegative) {
                number = -number;
            }
            while (number > 0) {
                sb.insert(0, digits[number % base]);
                number /= base;
            }
            if (isNegative) {
                sb.insert(0, '-');
            }
            return sb.toString();
        }
    }

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