包含全部黑色像素的最小矩形

/* 
 * 题目：包含全部黑色像素的最小矩形 
 * 解题思路： 
 * 1. 使用Java Stream API进行矩阵的遍历和索引计算。 
 */ 
import java.util.stream.IntStream; 
public class Solution { 
    public int minArea(char[][] image, int x, int y) { 
        int minX = IntStream.range(0, image.length) 
                             .filter(i -> IntStream.range(0, image[0].length).anyMatch(j -> image[i][j] == '1')) 
                             .min().orElse(x); 
        int maxX = IntStream.range(0, image.length) 
                             .filter(i -> IntStream.range(0, image[0].length).anyMatch(j -> image[i][j] == '1')) 
                             .max().orElse(x); 
        int minY = IntStream.range(0, image[0].length) 
                             .filter(j -> IntStream.range(0, image.length).anyMatch(i -> image[i][j] == '1')) 
                             .min().orElse(y); 
        int maxY = IntStream.range(0, image[0].length) 
                             .filter(j -> IntStream.range(0, image.length).anyMatch(i -> image[i][j] == '1')) 
                             .max().orElse(y); 
        return (maxX - minX + 1) * (maxY - minY + 1); 
    } 
}