重複JOptionPane彈出？

Question

所以我正在寫一個程序，給出每個輸入x秒鐘的分鐘數...現在的問題是，一旦我輸入第一個值，它會要求另一個值並將其分開....並且另一個價值......另一個價值......等等......我怎樣才能得到它只給我一個價值，並完成一個價值而不是永無止境的事物？

import javax.swing.JOptionPane; 

class TimeCalculator { 
public static void main(String[] args) { 

double seconds; 
String input; 

input = JOptionPane.showInputDialog("Enter any number of seconds"); 

seconds = Double.parseDouble(input); 

if (seconds >= 60); 
JOptionPane.showInputDialog(null, "There are " + (seconds/60) + " minutes in " + seconds + " seconds."); 


if (seconds >= 3600); 
JOptionPane.showInputDialog(null, "There are " + (seconds/60) + " minutes in " + seconds + " seconds."); 

if (seconds >= 86400); 
JOptionPane.showInputDialog(null, "There are " + (seconds/60) + " minutes in " + seconds + " seconds."); 

System.exit(0); 




} 
} 

Answer 1

首先 - 刪除每個if語句後的分號。其次，當您不要求輸入時，將showInputDialog更改爲showMessageDialog。第三，糾正你的代碼的邏輯：

class TimeCalculator{ 

    public static void main(String[] args) { 
     double seconds; 
     String input; 

     input = JOptionPane.showInputDialog("Enter any number of seconds"); 

     seconds = Double.parseDouble(input); 

     if (seconds >= 60) 
      JOptionPane.showMessageDialog(null, "There are " + (seconds/60) + " minutes in " + seconds + " seconds."); 

     if (seconds >= 3600) 
      JOptionPane.showMessageDialog(null, "There are " + (seconds/3600) + " hours in " + seconds + " seconds."); 

     if (seconds >= 86400) 
      JOptionPane.showMessageDialog(null, 
        "There are " + (seconds/86400) + " days in " + seconds + " seconds."); 
     System.exit(0); 
    } 
}