打球过程-模板方法

[java]代码库

import java.util.Scanner; 
public class Main{ 
    public static void main(String[] args) { 
         Scanner scan = new Scanner(System.in); 
         int n = scan.nextInt();
         String s = scan.next();
         if(n == 1) {
        	 BallMatch match = new FootballMatch(s);
        	 match.compete();
         }
         else if(n == 2) {
        	 BallMatch match = new BasketballMatch(s);
        	 match.compete();
         }

         scan.close();  
    } 
}  

abstract class BallMatch{
	private String s;
	public BallMatch(String _s) {
		s = _s;
	}
	public String getS() {
		return s;
	}
	public final void compete() {
		checkin();
		start();
		play();
		end();
		annouceResult();
	}
	private void checkin() {
		System.out.println("now checking in");
	}
	private void start() {
		System.out.println("now starting");
	}
	
	private void end() {
		System.out.println("now ending");
	}
        public abstract void play();
	public abstract void annouceResult();
}

class FootballMatch extends BallMatch{
	public FootballMatch(String _s) {
		super(_s);
	}
	public void play() {
		System.out.println("now playing football");
	}
	public void annouceResult() {
		System.out.println("now annoucing result: "+ super.getS());
	}
}

class BasketballMatch extends BallMatch{
	public BasketballMatch(String _s) {
		super(_s);
	}
	public void play() {
		System.out.println("now playing basketball");
	}
	public void annouceResult() {
		System.out.print("now annoucing result: "+ super.getS());
	}
}