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Objects in Python and Java - Coggle Diagram

- - - - Reference
        
        Several variables may store the same reference
        
        Points to
        
        Value
        
        Getting the reference
        
        id(variable)
    - - Immutable objects
        
        A new reference is created, so other objects with the original reference are not affected.
      - Mutable objects
        
        The reference is kept, so the value changes for every object with the same reference.
    - - a = b
        
        The reference is copied to the destination variable.
    - - id(obj1) == id(obj2)
      - obj1 is obj2
- - - - Stores
        
        Value
    - - Stores
        
        Reference
        
        May be null
        
        Points to
        
        Value
        
        Getting the reference
        
        System.out.println(variable);
        
        Several variables may store the same reference
      - is
        
        Instance of a class