java - 从另一个字符串数组中过滤字符串数组

Question

我对字符串函数有点困惑 我有一个字符串数组 示例

String Array1[]=new String[10];
Array1[0]="Hello";

String Array2[]=new String[10];
Array2[0]="Hello my world";
Array2[1]="Hi buddy";

我想从Array2中过滤字符串Array1[0] 即字符串“Hello”出现在Array2的哪个索引中。

Answer 1

   /**
     * This method searches for key in the array of String , starts looking from fromIndexSpecified
     * @param source
     * @param key
     * @param fromIndex
     * @return
     */
    private static int findIndexOfKey(String[] source, String key, int fromIndex) {

        if (fromIndex > source.length) {
            return -1;// invalid arg ..can also throw IlligleArgumentException
        }
        for (int index = fromIndex; index < source.length; index++) {
            if (source[index].indexOf(key) > -1) {
                return index;//found..!
            }
        }
        return -1; //no match found
    }