UniqueNo.java

import java.util.*;  
public class UniqueNumber {  
        public static void main(String args[] )  {  
            Scanner sc=new Scanner(System.in);  
            System.out.print("Enter the number you want to check:");  
            //reading an integer from the user  
            int number=sc.nextInt();  
            //converts integer data type into string  
            String str= Integer.toString(number);   
            //determines the length of the string  
            int length=str.length();  
            int flag=0, i, j;  
            //loop checks the digits are repeated or not  
            for(i=0;i<length-1;i++){  
                for(j=i+1;j<length;j++){  
                //comparing each digit, if digits are repeated the number is not unique       
                if(str.charAt(i)==str.charAt(j))   
                {   
                flag=1;  
                break;   
                }  
                }  
            }  
            //if flag is equal to zero the number is unique  
            if(flag==0)  
            System.out.println("The number is unique:"+number);  
            else  
            System.out.println("The number is not unique:"+number);  
        }  
}  

/**
 * @author Pradumn Patel */