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Core Java

Core Java tutorials.

  1. Static Fields and Methods

    by , 03-02-2012 at 05:16 PM
    Methods and fields might be declared static. This is also possible for C++. Only one copy is present for the complete class when field is static, rather than one copy for all class instances. If class instance is not present even then field’s copy is available. For example, given field addition in List class:

    static int numLists = 0;

    And, the given statement addition in the List constructor:


    When new List object creation takes ...
  2. Fields, Methods, and Access Levels

    by , 03-02-2012 at 05:13 PM
    • Java classes consist of methods and fields. A field is same as a C++ data member & a method is similar to a C++ member function.
    • Each method & field possess an access level:

    o private: access is possible in this class only
    o (package): access is possible in this package only
    o protected: access is possible in this package only & also in all subclasses.
    o public: access is possible anywhere this class is present.
    • Every class consist of these