Question

Write a program to accept a character from the terminal window and determine whether it is a letter or not. if it is an alphabet, display its opposite case. if it is not an alphabet, display an appropriate message. Write a program to accept a character from the terminal window and determine whether it is a letter or not. if it is an alphabet, display its opposite case. if it is not an alphabet, display an appropriate message.

Answer 1

Import java.util.*;

public class Check

{Scanner sc= new Scanner( System.in);

   public void main()

   {

System.out.println(“Enter the characher”);

char ch= sc.next().chatAt(0);

       if(Character.isLetter(ch))

       {

           if(Character.isUpperCase(ch))

           System.out.println(ch+" opposite case is "+ Character.toLowerCase(ch));

           else

           System.out.println(ch+ " opposite case is " +Character.toUpperCase(ch));

           

       }

       else

       System.out.println(ch+" is not a letter");

   }

}