백준 4963번) 섬의개수

package 신규아이디추천;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.StringTokenizer;

public class Main {
	static char[][] map;

	static void DFS(char condition, int r, int c, boolean[][] visited) {
		if (r < 0 || r >= map.length)
			return;
		if (c < 0 || c >= map[0].length)
			return;
		if (map[r][c] != condition)
			return;
		if (visited[r][c])
			return;
		visited[r][c] = true;
		DFS(condition, r - 1, c, visited);
		DFS(condition, r + 1, c, visited);
		DFS(condition, r, c - 1, visited);
		DFS(condition, r, c + 1, visited);
		DFS(condition, r - 1, c - 1, visited);
		DFS(condition, r + 1, c + 1, visited);
		DFS(condition, r + 1, c - 1, visited);
		DFS(condition, r - 1, c + 1, visited);
	}

	static int countMap() {
		boolean[][] visited = new boolean[map.length][map[0].length];
		int count = 0;
		for (int r = 0; r < map.length; ++r)
			for (int c = 0; c < map[0].length; ++c)
				if (visited[r][c] == false) {
					char condition = map[r][c];
					if (condition == '1')
						++count;
					DFS(condition, r, c, visited);
				}
		return count;
	}

	static void countMapList(ArrayList<char[][]> map_list) {
		for (int r = 0; r < map_list.size(); ++r) {
			map = map_list.get(r);
			System.out.println(countMap());
		}

	}

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder builder = new StringBuilder();
		int K = -1;
		int N = -1;
		ArrayList<char[][]> map_list = new ArrayList<char[][]>();
		char[][] temp_map;
		while (true) {
			StringTokenizer tokenizer = new StringTokenizer(reader.readLine());
			N = Integer.parseInt(tokenizer.nextToken());
			K = Integer.parseInt(tokenizer.nextToken());
			temp_map = new char[K][];
			if (K == 0 && N == 0)
				break;
			for (int i = 0; i < K; ++i)
				temp_map[i] = reader.readLine().replaceAll(" ", "").toCharArray();
			map_list.add(temp_map);
		}
		countMapList(map_list);

	}
}

처음에 map 배열 입력 받을려고 했을때
temp_map[i] = reader.readLine().toCharArray();
요런 식으로 해서 값이 제대로 입력이 안됨
왜냐하면 "1 1 0 0"을 입력할때 " "공백 때문에 제대로 입력이 안된다.

temp_map[i] = reader.readLine().replaceAll(" ", "").toCharArray();
그래서 요런식으로 공백을 없애준다.