2017/05/23 Java Basics Essay

1. Polymorphism Benefits:

A. Improved code maintainability (inheritance assurance)

B. Improved code extensibility (guaranteed by polymorphism)

Package Com.huawei;public class Demo2 {public static void main (string[] args) {Creatmethod (New Cat ());} Public static void Creatmethod (Animal a) {if (a instanceof cat) {cat c= (cat) A;c.catchrat ();} else if (a instanceof dog) {Dog d= (dog) a;d.shout ();}} Class animal{public void Eat () {System.out.println ("animal Eat");}} Class Cat extends Animal {public void Eat () {System.out.println ("Cat Eats");} public void Catchrat () {System.out.println ("Cat Catch Mouse");}} Class Dog extends Animal{public void eat () {System.out.println ("Dog Eat");} public void Shout () {System.out.println ("barking Dog");}}

2017/05/23 Java Basics Essay