Reassigning a Reference Variable to remove a reference to an object : Garbage Collection « Java Source And Data Type « SCJP

1. SCJP
2. Java Source And Data Type
3. Garbage Collection

public class MainClass {
   public static void main(String [] args) {
      StringBuffer s1 = new StringBuffer("hello");
      StringBuffer s2 = new StringBuffer("goodbye");
      System.out.println(s1);
      // At this point the StringBuffer "hello" is not eligible
      s1 = s2;
      // Now the StringBuffer "hello" is eligible for collection
   }
}