第一種方法：遍歷數組

String[] arr1 = {"1","2","3","4","6","7"};

}

第二種方法：先把數組轉換成list；再判斷contains

String[] arr = {"1","2","3","4","6","7"};List<String> list=Arrays.asList(arr);System.out.println(list.contains("5"));