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Java Study2002/영동-3주차


  • ... 받 동는 만 빼면 . C럼 만만 더... 받는데 많 는...
  • 민 1번 보.( 료)... 2번 례...리 count변 .

* 미는데.. 뭐 보는 . 디 3번 면, count 변는 럽 .

3번 는 comment solving 보 . 3번 대 면, 데, Bug 를 맞는 .

만 면 class main Main 바를 (?) . Java 는 는 문 딩 . MS면 리 ? .net 리 . --neocoin

Class main
~cpp 
import java.util.*;  
public class main{  
    public static void main(String[] args)  
    {  
        Bug bug1=new Bug(); 
        System.out.println("RandomWalk");
        bug1.journey[0]='0';   
        bug1.journey[1]='0';   
        bug1.journey[2]='4';   
        for(int i=0;bug1.journey[i]!='\0';i++) 
        	bug1.move(bug1.journey[i]);
    } 
}
Class Bug
~cpp 
public class Bug{ 
    public int x=0;  
    public int y=0;
    public int count=0;  
    public char journey[]={'\0','\0','\0','\0','\0'}; 
    Board aboard=new Board(); 
    
    public void move(char way)  
    {             
    	if(count==0)
    		aboard.board[0][0]++;            
        if(way=='0')//북     
        	x=x-1;  
        else if(way=='1')//북동  
        {    
        	x=x-1;  
            y=y+1;
        }
        else if(way=='2')//동  
        	y=y+1;    
        else if(way=='3')//남동  
        {  
          	x=x+1;  
            y=y+1;  
        }  
        else if(way=='4')//남  
          	x=x+1;  
        else if(way=='5')//남  
        {  
        	x=x+1;  
            y=y-1;  
        }  
        else if(way=='6')//      
         	y=y-1;     
        else if(way=='7')//북  
        {
        	x=x-1;  
            y=y-1;  
        } 
        if(x>=aboard.board.length)
        	x=0;
        if(x<0)
        	x=aboard.board.length-1;
        if(y>=aboard.board[0].length)
        	y=0;
        if(y<0)
        	y=aboard.board[0].length-1;
       		
       	aboard.board[x][y]++;   
              
        aboard.exhibit();  
        System.out.print("\n");   
        count++;    
	}  
}
Class Board
~cpp 
public class Board{ 
    public int board[][]={  
                {0,0,0,0,0},  
                {0,0,0,0,0},  
                {0,0,0,0,0},  
                {0,0,0,0,0},  
                {0,0,0,0,0}  
    };                     
    public void exhibit(){  
		for(int i=0;i<board.length;i++)  
		{  
    		for(int j=0;j<board.length;j++){  
        		System.out.print(board[i][j]);  
        		System.out.print("\t");  
        	}  
        System.out.print("\n");  
    	}  
    }  
}

1

  • 변 명.
  • word rap 는 부 복 .
  • 는 Board.count 

~cpp 
public class Board {
	public char journey[] =
		{ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0' };
	public int x = 0;
	public int y = 0;
	public int board[][] = { { 0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }
	};

	public void move(char way) {

		if (way == '0') //북
			{
			x = x - 1;
		} else if (way == '1') //북동  
			{
			x = x - 1;
			y = y + 1;
		} else if (way == '2') //동  
			{
			y = y + 1;
		} else if (way == '3') //남동 
			{
			y = y + 1;
			x = x + 1;
		} else if (way == '4') //남  
			{
			x = x + 1;
		} else if (way == '5') //남		  
			{
			y = y - 1;
			x = x + 1;
		} else if (way == '6') //  
			{
			y = y - 1;
		} else if (way == '7') //북  
			{
			y = y - 1;
			x = x - 1;
		}
		
		// WordRap   
		if (x >= board.length)
			x = 0;
		if (y >= board[0].length)
			y = 0;
		if (x < 0)
			x = board.length - 1;
		if (y < 0)
			y = board[0].length - 1;
		board[x][y]++;
		exhibit();
		System.out.println();
	}

	public void exhibit() {
		// Magic Number 
		for (int i = 0; i < board.length; i++) {
			for (int j = 0; j < board[i].length; j++) {
				System.out.print(board[i][j] + "\t");				
			}
			System.out.println();
		}
	}

	public static void main(String[] args) {
		Board aboard = new Board();
		System.out.println("RandomWalk");
		aboard.board[0][0]++;

		aboard.journey[0] = '0';
		aboard.journey[1] = '3';

		for (int i = 0; aboard.journey[i] != '\0'; i++)
			aboard.move(aboard.journey[i]);

	}

}

2

  • HashMap 방 대 변량 . 배 를 는 목.

~cpp 
import java.util.HashMap;

public class Board {
	public char journey[] =
		{ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0' };
	public int x = 0;
	public int y = 0;
	public int board[][] = { { 0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }
	};

	class 방 {
		방(int x, int y) {
			this.x = x;
			this.y = y;
		}
		int x;
		int y;
	}
	public void move(char way) {
		// HashMap   변량만 
		HashMap directionMap = new HashMap();

		directionMap.put("0", new 방(-1, 0)); // 북		
		directionMap.put("1", new 방(-1, 1)); // 북동		
		directionMap.put("2", new 방(0, 1)); // 동		
		directionMap.put("3", new 방(1, 1)); // 남동		
		directionMap.put("4", new 방(1, 0)); // 남		
		directionMap.put("5", new 방(1, -1)); // 남		
		directionMap.put("6", new 방(0, -1)); // 		
		directionMap.put("7", new 방(-1, -1)); // 북

		// primitive type  String(Object)  변는 
		// HashMap   방 델  내 x,y 더
		방 delta = (방) directionMap.get("" + way);
		x += delta.x;
		y += delta.y;

		// Wordrap  
		x = (x >= board.length) ? 0 : x;
		y = (y >= board[0].length) ? 0 : y;		
		x = (x < 0) ? board.length - 1 : x;
		y = (y < 0) ? board[0].length - 1 : y;

		board[x][y]++;
		// exhibit -> printBoard  rename
		printBoard();
		System.out.println();
	}

	public void printBoard() {
		// Magic Number 
		for (int i = 0; i < board.length; i++) {
			for (int j = 0; j < board[i].length; j++) {
				System.out.print(board[i][j] + "\t");
			}
			System.out.println();
		}
	}

	public static void main(String[] args) {
		Board aboard = new Board();
		System.out.println("RandomWalk");
		aboard.board[0][0]++;

		aboard.journey[0] = '0';
		aboard.journey[1] = '3';

		for (int i = 0; aboard.journey[i] != '\0'; i++)
			aboard.move(aboard.journey[i]);

	}
}

3

  • char jouney -> ArrayList 대
  • x, y -> nowX, nowY rename : 미 currentXPos .
  • 방 는 Magic number , Board.jouney ArrayList 므, String . comment mixing .


~cpp 
import java.util.ArrayList;
import java.util.HashMap;

public class Board {	
	// char jouney -> ArrayList  대	
	protected ArrayList jouney = new ArrayList();
	
	// x -> nowX	
	public int nowX = 0;
	// y -> nowY
	public int nowY = 0;
	public int board[][] = { { 0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }, {
			0, 0, 0, 0, 0 }
	};

	class 방 {
		방(int x, int y) {
			this.x = x;
			this.y = y;
		}
		int x;
		int y;
	}
	public void move(String way) {
		// HashMap   변량만 
		HashMap directionMap = new HashMap();

		// 방 는 Magic number 
		directionMap.put("북", new 방(-1, 0));
		directionMap.put("북동", new 방(-1, 1));
		directionMap.put("동", new 방(0, 1));
		directionMap.put("남동", new 방(1, 1));
		directionMap.put("남", new 방(1, 0));
		directionMap.put("남", new 방(1, -1));
		directionMap.put("", new 방(0, -1));
		directionMap.put("북", new 방(-1, -1));
		
		// primitive type  String(Object)  변는 
		// HashMap   방 델  냅.
		방 delta = (방) directionMap.get("" + way);

		nowX += delta.x;
		nowY += delta.y;

		// Wordrap  
		nowX = (nowX >= board.length) ? 0 : nowX;
		nowY = (nowY >= board[0].length) ? 0 : nowY;
		nowX = (nowX < 0) ? board.length - 1 : nowX;
		nowY = (nowY < 0) ? board[0].length - 1 : nowY;

		board[nowX][nowY]++;

		printBoard();
		System.out.println();
	}

	public void printBoard() {
		// Magic Number 
		for (int i = 0; i < board.length; i++) {
			for (int j = 0; j < board[i].length; j++) {
				System.out.print(board[i][j] + "\t");
			}
			System.out.println();
		}
	}

	public ArrayList getJouney() {
		return jouney;
	}

	public static void main(String[] args) {
		Board aboard = new Board();

		System.out.println("RandomWalk");
		aboard.board[0][0]++;

		// jouney getter jouney  를 . 
		// jouney 는 aboard  는 .
		ArrayList jouney = aboard.getJouney();
		jouney.add("북");
		jouney.add("남동");

		// 부 ArrayList  따른 변
		for (int i = 0; i < jouney.size(); i++)
			aboard.move((String) jouney.get(i));
	}

}

Thread

변 만 . 변 를 바 놓, IDE 붙, 뭐 바뀌는 보.

ArrayList , HashMap 보 바 들 는 Vector Hashtable 동 . 1.3 collection framework 를 더 .

collection framework를 면 보. 리 보면 미 . 럭.. --neocoin


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