명품 JAVA Programming 제 5장 Open Challenge

Bear의 Fish 먹기 게임 만들기 구현

 

import java.util.*;

abstract class GameObject{
	protected int distance, x, y;
	public GameObject(int startX, int startY, int distance) {
		this.x = startX;
		this.y = startY;
		this.distance = distance;
	}
	public int getX() { return x; }
	public int getY() { return y; }
	public boolean collide(GameObject p) {
		if(this.x==p.getX() && this.y == p.getY()) return true;
		else return false;
	}
	public abstract void move();
	public abstract char getShape();
}

class Bear extends GameObject{
	public Bear(int startX, int startY, int distance) {
		super(startX, startY, distance);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void move() {
		// TODO Auto-generated method stub
		this.distance++;
	}

	@Override
	public char getShape() {
		// TODO Auto-generated method stub
		return 'B';
	}

}

class Fish extends GameObject{

	public Fish(int startX, int startY, int distance) {
		super(startX, startY, distance);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void move() {
		// TODO Auto-generated method stub
		this.distance++;
		if(distance % 5 >= 3) {
			Random r = new Random();
			int dx[]= {1,-1,0,0};
			int dy[]= {0,0,1,-1};
			
			while(true) {
				int i = r.nextInt(4);
				int nextX=getX()+dx[i];
				int nextY=getY()+dy[i];
				if(nextX>=0 && nextX<10 && nextY>=0 && nextY<20) {
					this.x=nextX;
					this.y=nextY;
					break;
				}
			}	
		}		
	}

	@Override
	public char getShape() {
		// TODO Auto-generated method stub
		return '@';
	}
	
}

class Game{
	Scanner scanner=new Scanner(System.in);
	GameObject b,f;
	int dx[]= {0,1,-1,0};
	int dy[]= {-1,0,0,1};
	Game(){
		b=new Bear(0,0,0);
		f=new Fish(5,10,0);
		game();
	}
	public void game() {
		while(true) {
			showTable();
			move();
			if(f.collide(b)) {
				System.out.println("Bear Wins!!");
				break;
			}
		}
	}
	public void showTable() {
		for(int i=0;i<10;i++) {
			for(int j=0;j<20;j++) {
				if(b.getX()==i && b.getY()==j) {
					System.out.print(b.getShape());
				}
				else if(f.getX()==i && f.getY()==j) {
					System.out.print(f.getShape());
				}
				else {
					System.out.print('-');
				}
			}
			System.out.println();
		}
	}
	public void move() {
		System.out.print("왼쪽(a), 아래(s), 위(d), 오른쪽(f) >> ");
		String s=scanner.next();
		int x=b.getX(), y=b.getY(), nextX=-1, nextY=-1;
		if(s.charAt(0)=='a') {
			nextX=x+dx[0];
			nextY=y+dy[0];
		}
		else if(s.charAt(0)=='s') {
			nextX=x+dx[1];
			nextY=y+dy[1];
		}
		else if(s.charAt(0)=='d') {
			nextX=x+dx[2];
			nextY=y+dy[2];
		}
		else if(s.charAt(0)=='f') {	
			nextX=x+dx[3];
			nextY=y+dy[3];
		}
		if(nextX>=0 && nextX<10 && nextY>=0 && nextY<20) {
			b.move();
			b.x=nextX; b.y=nextY;
			System.out.println("Yes~!");
		}
		f.move();
	}
}

public class Main {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		
		System.out.println("** Bear의 Fish 먹기 게임을 시작합니다. **");
		Game g=new Game();
		
		scanner.close();
	}

}