sun

I was reading Java Platform Performance (sadly the link seems to have disappeared from the internet since I originally posed this question) and section A.3.3 worried me. I had been working on the assumption that a variable that dropped out of scope would no longer be considered a GC root, but this paper appears to contradict that. Do recent JVMs, in particular Sun's 1.6.0_07 version, still have this limitation? If so, then I have a lot of code to analyse... I ask the question because the paper is from 1999 - sometimes things change, particularly in the world of GC. As the paper is no longer

I found a java code and want to use it in my project. It contains these imports that my JDK does not have : import com.sun.awt.AWTUtilities; import com.sun.jna.Native; import com.sun.jna.platform.WindowUtils; I referred to sun site and found this download page : http://www.oracle.com/technetwork/java/javase/downloads/index.html Is it necessary to download all JDK and JRE and replace it from SUN website? My JDK is version 6 and is up to date. Thank you all josefx JNA is an additional library and not part of the standard api, you have to download it ( here ) and include it in your classpath. The

安装java jdk 有个基本常识 就是安装后要配置 java_home ，path和classpath， 而且安装路径不能有 空格。方法网上多的是，这里变不加赘述。 我在安装的时候出现了一个很难发现的问题（— -）——如题所述。在网上找了 很久，重新设置了很多次路径，电脑也重启了，就是没用。 原因：jdk和jre安装在同一个文件夹，jre覆盖了jdk的jre文件夹（总共两个哦）。 导致jre文件夹消失了一个！！所以安装java的时候要注意选择路径。或者干脆 使用默认路径。 然后path就都不用设置了，因为已经设置过了，除非你么设置或者换了文件夹安装了。 来源： oschina 链接： https://my.oschina.net/u/264056/blog/79374

Although tools.jar is not a component in JRE, but it comes with all major implementations of JDK such as Oracle JDK and OpenJDK. Not being standard component of JRE means that when I distribute a Java application which uses tools.jar , I have to distribute it along with the application bundle OR include it in classpath. My questions are: Does tools.jar contain platform-dependent components that prevent it from being distributed across different platforms (Windows/Linux/OSX)? We already know that Oracle JDK does not allow distribution of tools.jar , but what about OpenJDK, can we distribute

With the recent announcements from Oracle side, we have started to work on a plan for phasing out migration from the Sun JVM to the whatever reliable and free alternative we will end up with. Open JDK will obviously become a major option, now that IBM has announced its focus on it, but it will take some time for that to be an alternative to Sun's existing JVMs, in terms of stability and reliability. Are there any JVM options out there, which are powering real life mission critical applications? IBM's JVM can't be used on other than IBM hardware as far as I know. If you know of any alternatives

Over the past year I've made huge improvements in my application's Java heap usage--a solid 66% reduction. In pursuit of that, I've been monitoring various metrics, such as Java heap size, cpu, Java non-heap, etc. via SNMP. Recently, I've been monitoring how much real memory (RSS, resident set) by the JVM and am somewhat surprised. The real memory consumed by the JVM seems totally independent of my applications heap size, non-heap, eden space, thread count, etc. Heap Size as measured by Java SNMP Java Heap Used Graph http://lanai.dietpizza.ch/images/jvm-heap-used.png Real Memory in KB. (E.g.: