如何使用Java获取Ram大小和硬盘大小? [英] How to get Ram size and size of Hard disk using Java?

问题描述

如何使用Java获取PC的Ram大小和硬盘大小?并且可以通过java获取PC上当前登录的用户名吗?

How to get the Ram size and Hard disk size of the PC using Java? And Is it possible to get the currently logged user name on PC through java?

推荐答案

磁盘大小:

long diskSize = new File("/").getTotalSpace();

用户名:

String userName = System.getProperty("user.name");

我不知道用Java确定系统总内存的可靠方法.在Unix系统上，您可以解析/proc/meminfo .您当然可以找到JVM可用的最大内存:

I'm not aware of a reliable way to determine total system memory in Java. On a Unix system you could parse /proc/meminfo. You can of course find the maximum memory available to the JVM:

long maxMemory = Runtime.getRuntime().maxMemory();

为了完整性(感谢Suresh S)，这是一种仅使用Oracle JVM获取总内存的方法:

for completeness (thanks Suresh S), here's a way to get total memory with the Oracle JVM only:

long memorySize = ((com.sun.management.OperatingSystemMXBean) ManagementFactory
        .getOperatingSystemMXBean()).getTotalPhysicalMemorySize();

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