Reference to class not working?

Question

Hello, I am running in a problem, I have a class called Test, and I create 10 instances of it. The class contains an integer. public class Test { public Test(int init) { g = init; } public int g; } Now, I set the current "test" instance: Test current = "one of the 10 instances here"; Now.. if I modify the contents of the current instance after setting it as current, the current Test won't reflect these changes. For example: Test current = inst1; inst1.g = 100; now, current.g doesnt contain 100, but the old value.. I am confused. Doesn't reference work that way? Also, how do I use WeakReference, and where is it suitable at? Sorry for so many questions.