Coloring map, Java

Language: Layout:

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.*;
import java.lang.*;

class Rextester
{  
	public static int[] xPoint = { 0, -1, 1, 0 };
	public static int[] yPoint = { 1, 0, 0, -1 };
	static int count;
	public static List<Integer> list;

public static void main(String[] args) {
		// TODO Auto-generated method stub
		Readfile();
	}

public static void Excute(int xStart, int yStart, int[][] matrix, int rows, int cols) {

for (int i = 0; i < 4; i++) {
			int tempX = xStart + xPoint[i];
			int tempY = yStart + yPoint[i];
			if (0 <= tempX && tempX < rows && 0 <= tempY && tempY < cols && matrix[tempX][tempY] == 0) {
				matrix[tempX][tempY] = 4;
				count++;
				Excute(tempX, tempY, matrix, rows, cols);
			}
		}
//		for (int i = 0; i < rows; i++) {
//		for (int j = 0; j < cols; j++) {
//			System.out.print(matrix[i][j] + " ");
//		}
//		System.out.println();
//	}
//	System.out.println();
	}

public static void Readfile() {
		BufferedReader reader;
		try {
			list = new ArrayList<Integer>();            
			reader = new BufferedReader(new FileReader("D:\\Long\\Homework\\Coloring map\\input1.txt"));
			String line = reader.readLine();
			int case_seat = Integer.parseInt(line);
			line = reader.readLine();
			while (line != null) {
				String[] size_matrix = line.split(" ");
				if (size_matrix.length == 2) {
					int rows = Integer.parseInt(size_matrix[1]);
					int cols = Integer.parseInt(size_matrix[0]);
//					System.out.println(rows + " " + cols);
					int[][] matrix = new int[rows][cols];
					line = reader.readLine();
					for (int row = 0; row < rows; row++) {
						if (row != rows) {
							try {
								String[] row_matrix = line.split(" ");
								for (int col = 0; col < cols; col++) {
									try {
										matrix[row][col] = Integer.parseInt(row_matrix[col]);
									} catch (Exception e) {

}
								}
							} catch (Exception e) {
							}
							line = reader.readLine();
						}
					}

for (int i = 0; i < rows; i++) {
						for (int j = 0; j < cols; j++) {
							if (matrix[i][j] == 0) {
								matrix[i][j] = 4;
								count = 1;
								Excute(i, j, matrix, rows, cols);
								list.add(count);
							}
						}
					}

Collections.sort(list, new Comparator<Integer>() {
						@Override
						public int compare(Integer o1, Integer o2) {
							// TODO Auto-generated method stub
							return o2.compareTo(o1);
						}
					});
					
					for(int i=0;i<list.size();i++) {
						System.out.println(list.get(i));
					}

int k = 0;
					for (int i = 0; i < list.size(); i++) {
						k = k + list.get(i);

}
					System.out.println(k);
					list.clear();
//					for (int i = 0; i < rows; i++) {
//						for (int j = 0; j < cols; j++) {
//							System.out.print(matrix[i][j] + " ");
//						}
//						System.out.println();
//					}
//					System.out.println();
				}
			}

} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

[ + ] Show input