摘要：
1. Runtime.getRuntime().freeMemory() 和 jvisualvm.exe http://blog.csdn.net/u011004037/article/details/45740673 2.jmap命令 http://www.cnblogs.com/o-andy-o 阅读全文
摘要：
from: http://www.cnblogs.com/xudong-bupt/p/3961159.html http://blog.csdn.net/zi_jun/article/details/7624999 java中String、StringBuffer、StringBuilder是编程中 阅读全文