【剑指offer】二维数组中的查找

 1 public class Solution {
 2     public boolean Find(int target, int [][] array) {
 3         boolean result = false;
 4         if(array == null || array.length == 0) return false;
 5         for(int i = 0; i < array.length; i++){
 6             if(array[i] == null || array[i].length == 0) return false; //防止ArrayIndexOutOfBoundsException
 7             if(target >= array[i][0]){
 8                 result = BinaraySearch(target,array[i],0,array[i].length);
 9             }
10             if(result == true) return result;
11         }
12         return result;
13     }
14     public boolean BinaraySearch(int target, int[] array,int lo, int hi){
15         if(lo >= hi) return false;
16         int mid = (lo + hi) / 2;
17         if(array[mid] == target) return true;
18         else if(array[mid] > target) return BinaraySearch(target, array, lo, mid);
19         else return BinaraySearch(target, array, mid + 1, hi);
20     }
21 }