Java4android (Preliminary understanding of succession)

What is inheritance?

In object-oriented, inheritance is a class that obtains member variables and member methods in another class.

only single inheritance is supported in Java, multiple inheritance is not allowed

Inheritance is used to reduce duplicate code and is easy to modify

Example:

Parent class Person3

class person3{    String name;     int Age ;         void eat () {        System.out.print ("eat");    }         void introduce () {        System.out.print ("My name is" +name+ ", my age is" + ");     }

Sub-class Student

class extends person3{    //extends inheritance; extended  student subclasses get member functions and member variables        in the Person3 parent class / subclasses can add their own unique member variables and member functions        int grade;         void Study () {        System.out.print ("learning");}    }

Main function

class textstudent{    publicstaticvoid  main (String args[]) {        new  Student ();        Student.name  = "Pear";         = +;                Student.eat ();        Student.introduce ();        Student.study ();    }}

Output Result:
Eat

My name is pear, my age is 19

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