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One good Question about Garbage Collection

Class CardBoard {
       Short story = 200;
       CardBoard go(CardBoard cb){
            cb = null;
            return cb;
       }
       public static void main(String args[]){
            CardBoard c1 = new CardBoard();
            CardBoard c2 = new CardBoard();
            CardBoard c3 = c1.go(c2);
            c1 = null; // (1)
           // some code
       }
}
After executing line (1) how many objects are eligible for garbage collection ?

First we can go through the code,

- We are creating two objects and they are referred by reference variables c1 and c2.- During the execution of thisline
CardBoard c3 = c1.go(c2);
no new objects are created in the heap.

- The memory allocated for c1 can be garbage collected after line
c1 = null;
But the total number of objects garbage collected is 2 since the CardBoard class contains one wrapper object Short.

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