小白笔记-----------------------leetcode(28. Implement strStr())

Implement strStr().

Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.

这一次用java写的，确实比用c简单了许多。。。代码入下：

public class Solution {
public int strStr(String haystack, String needle) {
if(haystack.contains(needle)){
return haystack.indexOf(needle);
}else{
return -1;
}
}
}