多维有序数组寻找目标值

public class dwsz {
    public static void main(String[] args) {
        int [][]arry = {{1,2,3},{4,6,9},{10,12,16},{20,32,46}};
        test01(66,arry);
    }


    public static void test01(int taeget,int[][]arry){
        if (arry.length==0){
            return;
        }
        int hang = arry.length;
        for (int i=0;i<hang;i++){
            int x = twoFen(arry[i],0,arry[0].length-1,taeget);
            if (x>0){
                System.out.println(i);
                System.out.println(x);
                break;
            }
        }
    }
//    二分法
    public static int twoFen(int[]arry,int start,int end,int target){
        if (start>=end||arry.length==0){
            return -1;
        }
        while (start<end){
            int middle = end-start/2;
            if (arry[middle]==target){
                return middle;
            }else if (arry[middle]>target){
                end=middle-1;
            }else {
                start=middle+1;
            }
        }
        return -1;
    }
}