Why can't use " case 65"

Question

import java.util.*;
class Example{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
System.out.print("Input an integer : ");
int num=input.nextInt();

switch(num){
case 1 : System.out.println("Number 1 ");break;
case 'A': System.out.println("A");break;
case 'B': System.out.println("B");break;
case 65 : System.out.println("65");break; //Illegal
default : System.out.println("Wrong Number");break;
}

}
}

Answer 1

The int value of "A" in the ASCII code is 65; so when you try " case 'A' " you are really doing case 65.

So, the problem is that you have the same case two times in a switch.