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A string is said to be ‘Unique’ if none of the letters present in the string are repeated. Write a program to accept a string and check whether the string is Unique or not. The program displays a message accordingly.
Sample Input: COMPUTER
Sample Output: Unique String

Java

Java String Handling

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Answer

import java.util.Scanner;

public class KboatUniqueString
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String str = in.nextLine();
        str = str.toUpperCase();
        boolean isUnique = true;
        int len = str.length();
        
        for (int i = 0; i < len; i++) {
            
            char ch = str.charAt(i);
            
            for (int j = i + 1; j < len; j++) {
                if (ch == str.charAt(j)) {
                    isUnique = false;
                    break;
                }
            }
            
            if (!isUnique)
            break;
        }
        
        if (isUnique) 
            System.out.println("Unique String");
        else
            System.out.println("Not Unique String");
    }
}

Variable Description Table

Program Explanation

Output

BlueJ output of A string is said to be ‘Unique’ if none of the letters present in the string are repeated. Write a program to accept a string and check whether the string is Unique or not. The program displays a message accordingly. Sample Input: COMPUTER Sample Output: Unique String

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