Question

How to check if a number and its double contain exactly the same digits in Java

Answer 1

import java.util.stream.Collectors;
import java.util.stream.Stream;

class Program {
    private static boolean same_digits_double_number(int n) {
    	String s1 = String.valueOf(n);
    	String s2 = String.valueOf(n * 2);
    
    	s1 = Stream.of(s1.split(""))
                .sorted()
                .collect(Collectors.joining());
    	
    	s2 = Stream.of(s2.split(""))
                .sorted()
                .collect(Collectors.joining());
    	
    	return s1.equals(s2);
    }
    
    public static void main(String[] args) {
        int n = 125874;

	    System.out.println(same_digits_double_number(n));
    }
}




/*
run:
 
true
 
*/

 

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