GCF, Java - rextester

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import java.util.Scanner;

public class Rextester
{   
    String numDiologueLn;

public static void promptEnterKey()
    {
     Scanner scanner = new Scanner(System.in);
     scanner.nextLine();
    }

public static void main(String[] args)
    {
       Scanner input = new Scanner(System.in);
       
       System.out.print("Hey... buddy :)))");
       promptEnterKey();
       
       System.out.println("How's it hangin', my doood??");
       promptEnterKey();
       
       System.out.print("Bet chu I can find the GCF of two integers faster than you!!");
       promptEnterKey();
       
       System.out.println("yo");
       promptEnterKey();
       
       System.out.println("Please.. Broski, type the first positive integer, then hit enter.");
       int a = input.nextInt(); 
       	       if (a<=0)
    	          {
    	            System.out.println("\nD:");
          	        try 
          	        {
            		  Thread.sleep(2000);
       		        } catch (InterruptedException e)
       		             
       		        {
            		  e.printStackTrace();
        	        }
        	        
          	   System.out.print("Try again, big man, but this time do it like I told you!!");
      		   return;
    	  	  }
  
        System.out.println("\nPlease type the second positive integer, then hit enter, my doood.");
        int b = input.nextInt(); 
        	if (b<=0)
          	   {
    	            System.out.println("\nD:");
          	        try 
          	        {
            		  Thread.sleep(2000);
       		        } catch (InterruptedException e)
       		             
       		        {
            		  e.printStackTrace();
        	        }
        	        
          	   System.out.print("Try again, big man, but this time do it like I told you!!");
      		   return;
    	  	  }
  
        
        System.out.println("\nHOMIE!!!...");

int gcf;
    if (a==b)
    {
      gcf = a;
      System.out.println("The GCF is " + gcf + "!!!!!!!!");
    }
 
    while(b!=0){
    if (a > b)
        {
      int remainder = a % b;
      a = b;
      b = remainder;
        }
   
    else
        {
      int temp = a;
      a = b;
      b = temp;
        }
    }
   
     
    if (a != 1)
    {
      gcf = a;
      System.out.println("The GCF is " + gcf + "!!!!!!!!");
    } else
    {
      System.out.println("The two numbers are relatively prime!");
    }
      }
}

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Compilation time: 0.73 sec, absolute service time: 0,9 sec