Java Polymorphism Overview

Polymorphic

The so-called polymorphic, is actually a multi-state of an object;

In the following example, Tiger can be seen as Tiger, or as a animal

Cat can be seen as cat or animal

Dog can be seen as a dog, or as a animal.

Example code:

Package com.java1995;

Create a Animal class

public class Animal {
public void ShowMe () {
System.out.println ("I am an animal");
}

}

Package com.java1995;

Create a tiger class, inherit the animal class, and override its ShowMe () method

public class Tiger extends Animal {
public void ShowMe () {
System.out.println ("I Am a Tiger");
}

}

Package com.java1995;

Ibid., Cat class, inheriting animal class, overriding method

public class Cat extends Animal {
public void ShowMe () {
System.out.println ("I Am a cat");
//}

}

Package com.java1995;

Ibid., dog class, inheriting animal class, overriding method

public class Dog extends Animal {
public void ShowMe () {
System.out.println ("I am a Dog");
}

}

Package com.java1995;

Create a test class, play the Java language polymorphism, Tiger,cat,dog class

public class Test {
public static void Main (String [] args) {

Animal a=new Animal ();
A.showme ();

Two ways to create a tiger class
Tiger T=new Tiger (); First Kind
T.showme ();

Animal t2=new Tiger (); The second, Tiger belongs to the animal class, also belongs to the Tiger class
T2.showme ();

Animal c=new Cat ();
C.showme ();

Animal t3=new Tiger ();
ShowMe (T3);
TEST.SHOWME (t);

}

Create a showMe static method that integrates the above a.showme (); PS: Don't write
public static void ShowMe (Animal a) {
A.showme ();
}
}

Java Polymorphism Overview