setWrapText（true）不適用於JavaFX中的標籤

Question

我在javafx中創建了一個Label，其中包含大量文本。

Label l1 = new Label("\t\tC-Mark and Attendance Calculator is a simple " 
      + "software to find both the C-Mark and monthly attendance " 
      + "of students. Inorder to use the features of this software," 
      + " user has to create an account for him first. Then he should " 
      + "login using the username and password. He will be able to " 
      + "perform all the operations then. Further details are mentioned" 
      + " in the 'HELP' section in the user home page."); 
l1.setWrapText(true); 
l1.setTextAlignment(TextAlignment.JUSTIFY); 

在此代碼中setWrapText(true)不起作用。爲什麼？我怎樣才能使它工作？

Answer 1

Label l1 = new Label("\t\tC-Mark and Attendance Calculator is a simple " 
       + "software to find both the C-Mark and monthly attendance " 
       + "of students. Inorder to use the features of this software," 
       + " user has to create an account for him first. Then he should " 
       + "login using the username and password. He will be able to " 
       + "perform all the operations then. Further details are mentioned" 
       + " in the 'HELP' section in the user home page."); 
     l1.setWrapText(true); 
     l1.setTextAlignment(TextAlignment.JUSTIFY); 

這裏是一個SSCCE：

import javafx.application.Application; 
import javafx.geometry.Insets; 
import javafx.scene.Scene; 
import javafx.scene.control.Label; 
import javafx.scene.layout.StackPane; 
import javafx.scene.text.TextAlignment; 
import javafx.stage.Stage; 

public class WrappedLabelExample extends Application { 

    @Override 
    public void start(Stage primaryStage) { 
     Label l1 = new Label("\t\tC-Mark and Attendance Calculator is a simple " 
       + "software to find both the C-Mark and monthly attendance " 
       + "of students. Inorder to use the features of this software," 
       + " user has to create an account for him first. Then he should " 
       + "login using the username and password. He will be able to " 
       + "perform all the operations then. Further details are mentioned" 
       + " in the 'HELP' section in the user home page."); 
     l1.setWrapText(true); 
     l1.setTextAlignment(TextAlignment.JUSTIFY); 

     StackPane root = new StackPane(l1); 
     root.setPadding(new Insets(10)); 
     Scene scene = new Scene(root, 400, 400); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 

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

導致