Java中判断一个字符串数组是否包含相同字符串

如题。该问题很简单，使用一个嵌套循环即可解决，代码如下所示：

/**
 * judge that a String Array whether or not contained equal String
 * 
 * @param strings
 *            a string Array
 * @return return true, contained; return false, not contained
 */
public static boolean judgeStrArrayContainsSameStr(String[] strings) {
    int len = strings.length;
    for (int i = 0; i < len; i++) {
        String temp = strings[i];
        for (int j = i + 1; j < len; j++) {
            String string = strings[j];
            if (string.equals(temp)) {
                return true;
            }
        }
    }
    return false;
}