basic questions
摘要：
Map map = new HashMap(); map.put("1", 100); if (map.containsKey(1)) { System.out.println(map.get(1)); } if (map.containsKey("1")) { System.out.println("this one:" + map.get("1")); } Integer sx = null; if (sx == 3) { System.o... 阅读全文
posted @ 2013-11-04 17:36 ukouryou 阅读(98) 评论(0) 推荐(0) 编辑
