Write a program in Java to show scope of variables

Write a program in Java to show scope of variables

class scope {   

                        public static void main(String arg[]) {

                                    int x; //known to all code within main function

                                    x=10;

                                    if(x==10) {

                                                //Start new scope

                                                int y=20; //known only to this block

                                                //x and y both known here

                                                System.out.print("x and y : "+x+" "+y);

                                                x=y*2;

                                    }

                                    //y=100; //error because y is not here

                                    //x is still known here

                                    System.out.print("\nx is "+x);

                        }

}