重复JOptionPane弹出？

Question

所以我正在写一个程序，给出每个输入x秒钟的分钟数...现在的问题是，一旦我输入第一个值，它会要求另一个值并将其分开....并且另一个价值......另一个价值......等等......我怎样才能得到它只给我一个价值，并完成一个价值而不是永无止境的事物？

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 - 删除每个if语句后的分号。其次，当您不要求输入时，将showInputDialog更改为showMessageDialog。第三，纠正你的代码的逻辑：

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); 
    } 
}