Differences between member variables and local variables:

Source: Internet
Author: User

Differences between member variables and local variables:

Differences between member variables and local variables:

1. Different Positions in the class

Member variable: in the class, out of the Method

Local variables: In method definition or method declaration

2. The locations in the memory are different:

Member variable: In heap memory

Local variable: in stack memory

3. different lifecycles:

Member variable: It exists with the creation of the object and disappears with the disappearance of the object

Local variable: It exists with the call of the method and disappears with the completion of the call of the method.

4. Different initialization values

Member variable: with default initialization value

Local variable: No Default initialization value. It must be defined and assigned values before use.


The local variable name can be the same as the member variable name. the proximity principle is used in methods.

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