java-based inheritance

1  / ** 
2  * in inheritance subclasses among subclass object is created, the members of the rules of access methods:
 3  * Who created object that it is a priority with anyone, if not then look up.
4  * Note:
 5  * Whether it is a member or member variables method, if no parent is looking up, never looking down subclass.
6  *
 7  * Rewrite (Override)
 8  * Concept: the inheritance of them, the same name of the method, the parameter list is the same
 9  *
 10  * Rewrite (Override): the same method name, parameter list [too]. Cover, replication
 11  * Overload (Overload): the same method name, parameter list [different]
 12  *
 13  * method overwrites features, create a subclass object, the priority sub-class method.
14  *
 15  Note * overwrite method of:
 16  * 1, the same must be guaranteed between the parent-child class name, the same parameters.
. 17  * @Override: written before the method for detecting a valid right is not overwritten.
18 * 2, sub-class method returns the value of [] or less the parent class method returns the value range.
19  * Small extension Note: java.lang.Object class is the highest of all classes of common parent, java.lang.String is a subclass of Object.
20  county * 3, the subclass method must be greater than or equal [] the parent class method permissions modifier
 21  * small extension Note: public> protected> (default)> Private
 22  * Note: (default) is not a keyword, but What bothered, blank
 23 is  *
 24   * / 
25  public  class Demo01ExtendsMethod {
 26 is      public  static  void main (String [] args) {
 27          Zi = zi and new new Zi ();
 28  
29          zi.methodFu ();
 30          zi.methodZi ( );
 31 is  
32          //Create a new subclass of objects, all the priority subclasses method 
33 is          zi.method ();
 34 is  
35      }
 36 }

 

. 1  public  class Fu {
 2      public  void methodFu () {
 . 3          System.out.println ( "parent method performed" );
 . 4      }
 . 5  
. 6      public  void Method () {
 . 7          System.out.println ( "the same name as the parent class method " );
 8      }
 9 }

 

. 1  public  class Zi the extends Fu {
 2      public  void methodZi () {
 . 3          System.out.println ( "subclass method performed" );
 . 4      }
 . 5  
. 6      public  void Method () {
 . 7          System.out.println ( "subclasses weight method name " );
 8      }
 . 9  
10 }