/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
  private static Random rnd=new Random();
  public static int getRandom(){
    return rnd.nextInt(10000);
  }
  public static void main(String args[]){
    int r=getRandom();
    System.out.println("As number: "+r);
    System.out.printf("As 4-digit code, just printing: %04d\n",r);
    String s=String.format("%04d",r);
    System.out.println("As 4-digit code, in separate string: "+s);
  }
}

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