1.linkedlist基本用法:http://blog.csdn.net/i_lovefish/article/details/8042883
2.arraylist的一切:http://www.cnblogs.com/skywang12345/p/3308556.html
3.单向链表和双向链表详解:http://blog.csdn.net/Sun_Ru/article/details/51784058
4.GCD算法:http://blog.csdn.net/kindterry/article/details/6581355
5.Java正则表达式:http://www.runoob.com/java/java-regular-expressions.html