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Variable Lifetime

Local Variable (or Method Argument)

  • Created: When method starts
  • Destroyed: When method ends

    • Instance Variable

  • Created: When it's object is instantiated (new'd)
  • Destroyed: When it's object goes out of scope

    • Static Variable

  • Created: When process starts
  • Destroyed: When process stops

    • Example

    class MyClass{

  static int a;       //static variable
  int b;              //instance variable
  
  void meth1(int d){  //method argument
    int e;            //local variable
  }

}