heap

在myeclipse中出现：java.lang.OutOfMemoryError: Java heap space 或着java.lang.OutOfMemoryError: PermGen space 这两个错误，原因是tomcat 或着mycelispe没有设置好 如是单独启动tomcat出现这个问题，应该在如apache-tomcat-5.5.25incatalina.bat文件中 添加set CATALINA_OPTS=-Xms512m -Xmx1048m -XX:PermSize=128m -XX:MaxPermSize=400m 根据自己机器的实际情况决定，默认MaxPermSize为128,这个地方设置的也不能太大的，如果太大的话，运行startup.bat将会一闪而过，启动不了tomcat 如果是在myeclipse中启动出现这个问题，要是myeclipse中设置tomcat的启动参数 路径：Myeclipse->preferences->myeclipse->servers->tomcat->tomcat×.×->下， -Xms1024M -Xmx1024M -XX:MaxPermSize=400M不设置就算tomcat中设置了，也还是按默认的128M运行，这里的设置也要根据自己的机器的实际情况来定。

堆栈不够了加这个set JAVA_OPTS= -Xms32m -Xmx512m

内存溢出了. 吧JAVA虚拟机的内存配高点就行了.

内存溢出..哪里循环申请内存了,猜的,,没代码说个XX

使用Java程序从数据库中查询大量的数据时出现异常:java.lang.OutOfMemoryError: Java heap space在JVM中如果98％的时间是用于GC且可用的 Heap size 不足2％的时候将抛出此异常信息。JVM堆的设置是指java程序运行过程中JVM可以调配使用的内存空间的设置.JVM在启动的时候会自动设置Heap size的值，其初始空间(即-Xms)是物理内存的1/64，最大空间(-Xmx)是物理内存的1/4。可以利用JVM提供的-Xmn -Xms -Xmx等选项可进行设置。例如：java -jar -Xmn16m -Xms64m -Xmx128m MyApp.jar如果Heap Size设置偏小，除了这些异常信息外，还会发现程序的响应速度变慢了。GC占用了更多的时间，而应用分配到的执行时间较少。Heap Size 最大不要超过可用物理内存的80％，一般的要将-Xms和-Xmx选项设置为相同，而-Xmn为1/4的-Xmx值。Heap size的 -Xms -Xmn 设置不要超出物理内存的大小。否则会提示“Error occurred during initialization of VM Could not reserve enough space for object heap”。

Java堆空间，指的是JVM在内存中管理对象实例的内存区域，是存放对象实例的最大内存区域，所有的对象实例都在这里分配内存。

可以。then 是 thanIt is cheaper to buy old furniture than to make new one.

程序员交流技术的用语: 空口无凭说没意义,拿实例代码给我看.通俗的翻译就是: "别BB,上代码".

歌曲名:The Flame歌手:Cheap Trick专辑:Original Album ClassicsAnother night slowly closes inand I feel so lonelyTouching heat freezing on my skin I pretend you still hold meI"m going crazy, I"m losing sleepI"m in too far, I"m in way too deep over youI can"t believe you"re goneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameWatching shadows move across the wallfeels so fright"ningI wanna run to you, I wanna call,but I"ve been hit by lightningJust can"t stand up for falling apartCan"t see through this veil across my heartover youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameI"m going crazy, I"m losing sleepI"m in way too deep over youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flamehttp://music.baidu.com/song/13704110

歌曲名:The Flame歌手:Cheap Trick专辑:The Greatest HitsAnother night slowly closes inand I feel so lonelyTouching heat freezing on my skin I pretend you still hold meI"m going crazy, I"m losing sleepI"m in too far, I"m in way too deep over youI can"t believe you"re goneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameWatching shadows move across the wallfeels so fright"ningI wanna run to you, I wanna call,but I"ve been hit by lightningJust can"t stand up for falling apartCan"t see through this veil across my heartover youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameI"m going crazy, I"m losing sleepI"m in way too deep over youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flamehttp://music.baidu.com/song/9337015

歌曲名:The Flame歌手:Cheap Trick专辑:Lap Of LuxuryAnother night slowly closes inand I feel so lonelyTouching heat freezing on my skin I pretend you still hold meI"m going crazy, I"m losing sleepI"m in too far, I"m in way too deep over youI can"t believe you"re goneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameWatching shadows move across the wallfeels so fright"ningI wanna run to you, I wanna call,but I"ve been hit by lightningJust can"t stand up for falling apartCan"t see through this veil across my heartover youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flameI"m going crazy, I"m losing sleepI"m in way too deep over youYou"ll always be the oneYou were the first, you"ll be the lastWherever you go I"ll be with youWhatever you want I"ll give it to youWhenever you need someone to lay your heart and head uponRemember after the fire after all the rainI will be the flameI will be the flamehttp://music.baidu.com/song/8804569

纠正两点错误：1、"对象引用都是在栈里的",不能这么说，static Integer i=new Integer（5）;这里的引用变量在datasegment里2、 “data segment那个不太清楚，只知道存放常量和静态的”，不是放常量，是字符串常量

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