374. Guess number higher or Lower java

We are playing the Guess Game. The game is as follows:

I pick a number from 1 to N. You had to guess which number I picked.

Every time you guess wrong, I'll tell you whether the number is higher or lower.

You call a pre-defined API guess(int num) which returns 3 possible results ( -1 , 1 , or 0 ):

-1:my number is lower 1:my number is higher 0:congrats! You got it!

Example:

n = ten, I pick 6.Return 6.

Test instructions: Guess a number, according to the order of the dichotomy, guess the big time reminder 1, guess the hour reminder-1, guess the time to remind 0, Q: What is the number in the Guess?
Idea: According to the order of dichotomy to guess, according to the size of the hint to choose the left or right half of the part.
Java:

public class Solution extends Guessgame {public    int guessnumber (int n) {        int left=1;int right=n;        while (left<=right)//According to the dichotomy of        {        int number=left+ (right-left)/2;        Count=guess (number);        if (count==0)        return number;//guess on the direct return to        else if (count==1)//Guess large, select the left half        left=number+1;        else {right=number-1;//Guess the right half of the hour to select}               }        return-1;}}    

　　

374. Guess number higher or Lower java