@@ -0,0 +1,353 @@
+package com.dw.lib.test;%0A%0Aimport java.util.TreeMap;%0A%0Apublic class TreeMapTest %7B%0A%09public static void main(String%5B%5D args) %7B%0A%09%09TreeMap%3CInteger, String%3E map = new TreeMap%3C%3E();%0A%09    map.put(3, %22val%22);%0A%09    map.put(2, %22val%22);%0A%09    map.put(1, %22val%22);%0A%09    map.put(5, %22val%22);%0A%09    map.put(4, %22val%22);%0A%09    %0A%09    System.out.println(map.keySet().toString());%0A%09%7D%0A%7D%0A

add treemap test