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/**

* Created by codingBoy on 17/2/6.

*/

public class implementStrStr

{

/**

* mplement strStr().

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

* 返回needle在haystack中第一次出现的下标，这个题未免也太简单了吧！！！！

* 看了很多人的答案，发现这样做就可以了。。。

* @param args

*

*/

public static void main(String[] args)

{

String s1="asdfghjksdfghjk";

String s2="sdfghjk";

System.out.println(strStr(s1,s2));

}

public static int strStr(String haystack, String needle) {

int index=haystack.indexOf(needle);

return index;

}

}