Saying that Java is nice because it works on every OS is like saying that anal sex is nice because it works on every gender.…

[root@crm-web- bin]# shutdown.sh bash: shutdown.sh: command not found [root@crm-web- bin]# sh shutdown.sh Using CATALINA_BASE: /home/soft/apache-tomcat-7.0.92_1 Using CATALINA_HOME: /home/soft/apache-tomcat-7.0.92_1 Using CATALINA_TMPDIR: /home/soft/…

启动程序报错: Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000006fff80000, 2863661056, 0) failed; error=’Cannot allocate memory’ (errno=12) # There is insufficient memory for the Java Runtime Environment to continue. # Native memo…

启动项目报错 Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000fa980000, 59244544, 0) failed; error='Cannot allocate memory' (errno=12) # There is insufficient memory for the Java Runtime Environment to continue. # Native memory…

linux基于tomcat部署的web应用程序报 Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000794500000, 576716800, 0) failed; error='Cannot allocate memory' (errno=12) 淡定,不要着急 这个问题引起的原因是:服务器上物理内存太小,大部分都是应为程序太多,内存吃紧,而给jvm分配的内存太大(java程序启动需要的内存,…

一.简介 二.代码流程 1.private Map<String, SoftReference<Drawable>> imageCache = new HashMap<String, SoftReference<Drawable>>();来起到缓存图片的作用 2.每当要访问图片,先在map找,找不到则new Thread().start(),访问网络得到图片,再传给handler, Message message = handler.obtainMessag…

首次启动Kafka报错如下: 原因:内存不足,查看启动配置 调小一些:…

原因是内存不足了 解决办法:1.top命令查看后台进程,看哪些可以关闭 2.ps -ef |grep tomcat看哪些不用的tomcat起着,也可以从这里关 3.加大这个tomcat的内存, 在catalina.sh中,在 cygwin=false 的上面一行加上:JAVA_OPTS="-server -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m"…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

Java语言编码规范(Java Code Conventions) 名称 Java语言编码规范(Java Code Conventions) 译者 晨光(Morning) 简介 本文档讲述了Java语言的编码规范,较之陈世忠先生<c++编码规范>的浩繁详尽,此文当属短小精悍了.而其中所列之各项条款,从编码风格,到注意事项,不单只Java,对于其他语言,也都很有借鉴意义.因为简短,所以易记,大家不妨将此作为handbook,常备案头,逐一对验. 声明 如需复制.传播,请附上本声明,谢谢.原文出处…