Creation date: 19 March, 2011

Variable hiding

class A {
   static int n=5;
   static void go(){
      int n=15;
      System.out.println(n);
      for (n=0; n<1; n++) {
         System.out.println(n);
      }
   }

   public static void main(String[] args) {
      System.out.println(n);
      go();
      System.out.println(n);
   }
}

Here the first declared n is a class variable. The second n in method go() is a stack variable. Inside of method go() it hides a class variable. Therefore the result will be as follows.

5
15
0
5

First println, inside of main method prints a class variable's value. The second println (inside go() method) prints a stack variable because stack variable here hides a class variable. The third println prints the same stack variable's modified value. The last println shows us that class variable remains the same after go() method.

Author: Jafar N.Aliyev (Jsoft)

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