resources - Java closing/cleaning up -

I have a class in which there are some large objects:

  public class MyClass { BigObject bo; Public MyClass () {...}}   
 Should I make a close approach like the following:  
  public zero-off () {bo = Null; }   
 I think this is good for garbage collection (?) Am I on the right track? How should I go for cleaning this class?  
 
 
 I think this is good for garbage collection   
 No, it just masers the code.  
 What is the catchover of the example of MyClass ? If you need an example of  MyClass  to stay alive but is not  Big Object  then - and only then - can you  BO  Setting should be bothering zero But at the same time, you should consider your design. Generally, all states of one class are important for its lifetime. There are exceptions to that rule, but they are relatively rare.  
 When the example of  MyClass  is eligible for garbage collection, its  BO  variable will be irrelevant to whether the  BigObject Example of  is eligible for garbage collection, so it does not matter if it is not empty or not ... but it  does  clean up after you manually To try, write a large difference in the context of the  not  code. They may have.  
 You should clear resources such as currents, country handles etc. - but usually you can handle the garbage collector with the memory.