Question

How to check if a string contains identical digits in Java

Answer 1

import java.util.Set;
import java.util.Arrays;
import java.util.HashSet;
  
class StringContainIdenticalDigits_Java {
    static boolean isStringContainIdenticalDigits(String str) {
        Set<String> set = new HashSet<String>(Arrays.asList(str.split("")));
           
        return set.size() == 1;
    }
   
    public static void main(String[] args) {
        String str = "8888888";
    
        if (isStringContainIdenticalDigits(str)) {
            System.out.println("yes");
        } else {
            System.out.println("no");
        }
    }
}
   
   
   
/*
run:
   
yes
   
*/

 

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