如何將值傳遞給一個將所述值乘以十的方法？

Question

通過我的Tafe工作，我必須對其進行設置，以便我的Java程序詢問用戶名稱和他們的成績平均值，然後將平均值乘以10，並顯示結果。目前我的代碼看起來像這樣

public static void main(String[] args) 
{ 

    Scanner sc = new Scanner(System.in); 
    String Name; 
    String gradePoint; 

    Name=JOptionPane.showInputDialog(null, "Please enter your name.", "Input Name", JOptionPane.QUESTION_MESSAGE); 
    gradePoint = JOptionPane.showInputDialog(null, "What is your grade point average?", "Grade point average", JOptionPane.QUESTION_MESSAGE); 
    System.out.println("Your name is " + Name + ", and your grade point average is " + gradePoint + ", so your book store credit is " + Integer.parseInt(gradePoint)*10); 

} 

我知道這是公理性的錯誤，但我對Java仍然很陌生。請告訴我我必須做出的所有更改。

Answer 1

我採取了你的代碼，並製作了一個只使用對話框的工作版本。掃描儀輸入上沒有System.out。從您的評論中，您似乎正在使用JavaFX項目。這不是JavaFX代碼，只是一個普通的應用程序...

public static void main(String[] args) throws Exception { 
    String name = JOptionPane.showInputDialog(null, 
      "Please enter your name.", "Input Name", JOptionPane.QUESTION_MESSAGE); 
    String gradePointString = JOptionPane.showInputDialog(null, 
      "What is your grade point average?", "Grade point average", JOptionPane.QUESTION_MESSAGE); 
    int gradePoint = Integer.parseInt(gradePointString); 
    int x = 10; 
    JOptionPane.showConfirmDialog(null, 
      "Your name is " + name + ", and your grade point average is " + gradePoint + 
      ", so your book store credit is " + (gradePoint*x)); 
}