leetcode Implement strStr()

题目链接这里

public class Solution {
    public int strStr(String haystack, String needle) {
        out:for(int i=0;i<haystack.length()-needle.length()+1;i++)
        {
            for(int j=0;j<needle.length();j++)
            {
                if(haystack.charAt(i+j)!=needle.charAt(j))
                {
                    continue out;
                }
            }
            return i;
        }
        return -1;
    }
}