How finalize program works

Question

My question is how to make this finalize method to return "garbage collected" since the 3 object below is eligible for garbage collection.
Did i overriden the finalize method incorrectly or my code problem.
Kindly assist...
     public class Test {
     protected void finalize() throws Throwable
     {         System.out.println("Garbage collected");
     super.finalize();}
public static void main (String args[])
     {   for (int i = 0 ;i < 100000 ;i++)
     Test a = new Test();
     Object o =new Object();
     Object oa[] = new Object[1];
     o = null;
     oa = null;
     a = null;
     return ;
     }      }

Answer 1

You are right , i never think about my OS memory issue .....Tq for your perfect answer ,but anyway it is very difficult to make finalize work using my own coding cause "DR watson " Error will prompt me first before the code run if try to do force allocate of all the memory resources.
Anyway how about this question.
Question : Which line is the eligible for garbage collection.
1.public class Test
2.{       public static void main (String args[])
3.     {
4.     String s1 = "One";
5.     String s2 = "Two";
6.     s2+=s1;
7.     s1=null;
8.     s1=s2;
9.     System.out.println(s1);
10.     }
11.}
A.Before line 7
B.Before line 8
C.Before line 9
D.Before line 10
E.Before line 5