public class Switch {

public static void main(String[] args) {

//Except switch else were {} are optional

//switch(5)//error

//cases and default is optional

// switch(90)//valid

// {

// Every statement inside switch must be under some case (or) default.

// Independent statements are not allowed

// System.out.println("I am independent statement");//error

// }

int x=90;

final int y=2;

switch (90) {

//Every case lable should be compile time constant else we get Error

case x://error

System.out.println("cdcd");

break;

case y://This is valid as y is final variable

;

default:

System.out.println(" I addcd");

break;

}

//Every Case label should be in range of Switch argument type

//here we are using byte so case label should in range of byte (-256 to 255)

byte b = 10;

switch (b)

{

case 10:

System.out.println("10");

case 100:

System.out.println("100");

case 1000://error

System.out.println("1000");

}

//Within switch statement we can default only once

switch(89)

{

case 89:

break;

default:

;

default://error

;

}

}

}