First, the difference between the member variables and static variables
1, belongs to a different: an object belonging to member variables, also known as instance variables
Static variables belong to the class, also known as class variables
2 different memory location: member variables are stored in the heap memory
Static Static variables are stored in the method area area
3, memory occurs at different times: with the member variables to create an object exists, the object disappear with the disappearance
Static variables with loading and load class, disappear with the disappearance of the class
4, call different: member variables can only be invoked by an object
Static variables can be invoked by class name, it can also be invoked through objects
Second, the difference between the member variables and local variables
1, positions different classes: an outer member variable in the class method
Local variables declared in the method or methods defined
2 different memory location: member variables in heap memory
Local variables on the stack memory
3, different life cycle: create member variables with objects exist
Local variables of the call method exists
4, initialization value: member variables default initialization value
Local variables must be defined assignment
