摘要:
Joiner: List<String> stringList = new ArrayList<String>(); stringList.add("aa"); stringList.add("bb"); System.out.println(new JoinerTest().buildString 阅读全文
摘要:
转载:http://www.cnblogs.com/whitewolf/p/4231783.html Null sucks 回到本文主题Optional。在我日常编程中NullPointerException是肯定是大家遇见最多的异常错误: 为此Doug Lea曾说过: Null sucks. Si 阅读全文