You can use this code. It will check the char is present or not. If it is present then the return value is >= 0 otherwise it's -1. Here I am printing alphabets that is not present in the input.

import java.util.Scanner; public class Test { public static void letters() { System.out.println("Enter input char"); Scanner sc = new Scanner(System.in); String input = sc.next(); System.out.println("Output : "); for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) { if(input.toUpperCase().indexOf(alphabet) < 0) System.out.print(alphabet + " "); } } public static void main(String[] args) { letters(); } } 

Ouput Example

Enter input char nandu Output : B C E F G H I J K L M O P Q R S T V W X Y Z 

You can use this code. It will check the char is present or not. If it is present then the return value is >= 0 otherwise it's -1. Here I am printing alphabets that is not present in the input.

import java.util.Scanner; public class Test {  public static void letters()  {   System.out.println("Enter input char");   Scanner sc = new Scanner(System.in);   String input = sc.next();   System.out.println("Output : ");   for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) {   if (input.toUpperCase().indexOf(alphabet) < 0)   System.out.print(alphabet + " "); } } public static void main(String[] args) { letters(); } } 

Ouput Example

Enter input char nandu Output : B C E F G H I J K L M O P Q R S T V W X Y Z 

you can use this code. It will check the char is present or not. If it is present then the return value is >= 0 otherwise it's -1. Here I am printing alphabets that is not present in the input. import java.util.Scanner;   public class Test {   public static void letters() { System.out.println("Enter input char"); Scanner sc = new Scanner(System.in); String input = sc.next(); System.out.println("Output : "); for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) {   if(input.toUpperCase().indexOf(alphabet) < 0)   System.out.print(alphabet + " "); } } public static void main(String[] args) { letters(); } 

}

//Ouput Example Enter input char nandu Output : B C E F G H I J K L M O P Q R S T V W X Y Z 

You can use this code. It will check the char is present or not. If it is present then the return value is >= 0 otherwise it's -1. Here I am printing alphabets that is not present in the input.

import java.util.Scanner; public class Test { public static void letters() { System.out.println("Enter input char"); Scanner sc = new Scanner(System.in); String input = sc.next(); System.out.println("Output : "); for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) { if(input.toUpperCase().indexOf(alphabet) < 0) System.out.print(alphabet + " ");   }  }  public static void main(String[] args) {   letters(); } } 

Ouput Example

Enter input char nandu Output : B C E F G H I J K L M O P Q R S T V W X Y Z