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it's spelled "ass" not "arse". Get your spelling correct.

I just want a SIMPLE input validation loop

can you show me exactly how to do it?

import java.util.*;

class rps{
public static void main(String args[]){
Random number = new Random();
Scanner input = new Scanner(System.in);

// player chooses
String choice;

so let''s say I have a rock paper scissors program and I want the user to enter ONLY rock, paper and scissors. If the user enters anything else, the program would display an error message and ask the...