用基類，介面，本類執行個體化對象的區別

廢話不多說了，代碼很清楚

寫個基類FatherClass.java

package com;public class FatherClass {public void speak(){System.out.println("Father method,speak() ");}public void sing(){System.out.println("Father method,sing() ");}public void jump(){System.out.println("Father method,jump() ");}public void run(){System.out.println("Father method,run() ");}}

寫個介面MotherInterface.java

package com;public interface  MotherInterface {public void cook();public void clean();public void love();}

寫具體的類SonClass.java

package com;public class SonClass extends FatherClass implements MotherInterface{@Overridepublic void cook() {// TODO Auto-generated method stubSystem.out.println("Son method cook()");}@Overridepublic void clean() {// TODO Auto-generated method stubSystem.out.println("Son method clean()");}@Overridepublic void love() {// TODO Auto-generated method stubSystem.out.println("Son method love()");}////////////////////重載基類方法///////////////////////////////////public void jump(){System.out.println("Son method,jump(),extends FatherClass ");}public void run(){System.out.println("Son method,run(),extends FatherClass");}////////////////////寫自己的方法///////////////////////////////////public void myMehtod(){System.out.println("Son method,myMehtod(),我自己的方法");}public static void main(String[] ss){//用基類執行個體對象，對象只有基類方法//（如果重載基類方法，走重載的那個方法）FatherClass fc=new SonClass();//用介面執行個體對象，對象只有介面方法//這些方法必須實現MotherInterface mi=new SonClass();//用本類執行個體對象，既有基類方法（有重載方法走重載的那個）;//又有介面方法(介面方法必須實現);還有自己本類的專屬的方法。SonClass son=new SonClass();System.out.println("--------基類執行個體的對象fc------------");fc.speak();fc.sing();fc.jump();fc.run();System.out.println("--------介面執行個體的對象mi------------");mi.cook();mi.clean();mi.love();System.out.println("--------本類執行個體的對象son------------");son.speak();son.sing();son.jump();son.run();son.cook();son.clean();son.love();son.myMehtod();}}

控制台列印：

--------基類執行個體的對象fc------------
Father method,speak()
Father method,sing()
Son method,jump(),extends FatherClass
Son method,run(),extends FatherClass
--------介面執行個體的對象mi------------
Son method cook()
Son method clean()
Son method love()
--------本類執行個體的對象son------------
Father method,speak()
Father method,sing()
Son method,jump(),extends FatherClass
Son method,run(),extends FatherClass
Son method cook()
Son method clean()
Son method love()
Son method,myMehtod(),我自己的方法