剑指Offer:面试题04. 二维数组中的查找

[
  [1,   4,  7, 11, 15],
  [2,   5,  8, 12, 19],
  [3,   6,  9, 16, 22],
  [10, 13, 14, 17, 24],
  [18, 21, 23, 26, 30]
]

public boolean findNumberIn2DArray(int[][] matrix, int target) {
        for (int i = 0; i < matrix.length; i++) {
            if(matrix[i].length-1<0||matrix[i][0]>target||matrix[i][matrix[i].length-1]<target){
                continue;   
            }
            int low=0;
            int heigh=matrix[0].length-1;
            while(low<=heigh){
                int mid=low+((heigh-low)>>1);
                if(matrix[i][mid]>target){
                    heigh=mid-1;
                }else if(matrix[i][mid]<target){
                    low=mid+1;
                }else{
                    return true;
                }
            }
        }
        return false;
    }