public static void main(String[] args) {
 int x = 1;
 switch (x) {
 // int y;
 case 1:
 int a;
 System.out.println(0);
 break;
 case 2: {
 int b;
System.err.println(1);
 break;
 }
 default:
 System.err.println(2);
 }
 }