Question

How to check if a number contains identical digits in Java

Answer 1

import java.util.Set;
import java.util.Arrays;
import java.util.HashSet;

public class NumberContainIdenticalDigits_Java {
    static boolean numberContainIdenticalDigits(int number) {
        String str = Integer.toString(number); 
        
        Set<String> set = new HashSet<String>(Arrays.asList(str.split("")));
           
        return set.size() == 1;
    }
    
    public static void main(String args[]) {
        int n = 888888;
        
        System.out.println(numberContainIdenticalDigits(n));
    }
}
 
 
 
/*
run:
 
true
 
*/

 

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