判断以逗号分隔的字符串中是否包含某个数的实例

@Test
  public void test2222(){
    String ids = "1,2,3,45,35";
    String[] values = ids.split(",");
    List<String> list = Arrays.asList(values);
    if(list.contains("4")){
      System.out.println("true");
    }else {
      System.out.println("false");
    }
  }