我们如何在java编程中添加时间延迟?

How can we add time delay in java programming?

我有这个程序:

import javax.swing.*;

public static void main()
{
    try {
        String stringyInp = JOptionPane.showInputDialog( null , "Enter your number" ) ; 
        int input = Integer.parseInt(stringyInp) ;
    }catch(Exception e) {
       JOptionPane.showMessageDialog(null ,"Enter only numerical values") ; //i want here to add a time delay of 3 seconds!How?
       main(); 
    }
    System.out.print( FACTORIAL(input)) ;


}// instance variables - replace the example below with your own



 public static int FACTORIAL(int number )
{
     if (number == 0){
         return 1 ;
        }
        else {

    return FACTORIAL(number-1) * number ;

}

那么我们如何添加时间延迟,我们如何执行延迟3秒的指令??我想在此程序中添加 3 秒或 2 秒的延迟...

我想你可以使用这段代码。

   try {
     Thread.sleep(1000);
   } catch(InterruptedException ex) {
     Thread.currentThread().interrupt();
   }