[Java]繼承、多型、覆寫、覆載實作

public class HelloWorld {

	public static void main(String[] args) {
					
		user newStrongMan = new user("小明");	
		user twoStrongMan = new user("C8763");
		user threeStrongMan = new user("還敢下來阿冰鳥");
		fighter Nfighter = new fighter("達瑞斯");
		
		System.out.println("新人的數量:"+ user.how_many_man); 
		
		newStrongMan.be_strong(); // 
		System.out.println("新人的力量:"+ newStrongMan.power);  
		System.out.println("新人的名字:"+ threeStrongMan.name);  
		System.out.println("新人的名字:"+ Nfighter.name);  
		Nfighter.be_strong(); // 多型、覆寫 
		Nfighter.be_strong(87); // 覆載
		
	
	}
}

public class user {
	
   static int how_many_man; //全域變數

	String name;
	int power,smart,speed;
	
	user(String name){
		this.name = name;
		power =87;
		how_many_man++;
	}
		
	 void be_strong() {
		power ++;
	}
	 void be_fast(){
		speed++;
	}
	 int how_strong() {
		return power;
	}
	 int how_fast() {
		return speed;
	}
}

public class fighter extends user { \\extends 繼承父類別，轉職成戰士
	
	fighter(String name) {
		super(name); //讓父類別的初始化能成功執行，把此fighter傳入值在傳回給父雷別
		//this.name = "戰士"; //呼叫此類別中的name
	}
	
	 void be_strong() {
		System.out.println("開剁"); //覆寫父類別的be_strong()
	}
	 void be_strong(int i) {
			System.out.println("開剁幾次:"+i);//覆載同類別中的be_strong()方法
		}


}