Java4android Basic Learning Replication (override)

1. Replication (override)

1) exists with the parent class and subclass;

2) Each of the parent and child classes has a function, the two function names, the return value type, the parameter list, exactly the same, which is called the relationship between the two functions as a replication (override);

// Parent Class class father{    void function () {        System.out.println ("Function of the parent class");}  }   

// sub-class class extends father{    void function () {      System.out.println ("function of the subclass");}    }

This means that there is a replication relationship between the function functions in Son and father.

2. Call the member function in the parent class with super;

1) use Super.function () to invoke functions in the parent class, such as:

// Parent Class class father{    void function () {        System.out.println ("Function of the parent class");}  }        

// sub-class class extends father{    void  function () {
      super.function ();      System.out.println ("function of the subclass");}    }

　　

Java4android Basic Learning Replication (override)