com.phloc.commons.system

Class SystemHelper

java.lang.Object

com.phloc.commons.system.SystemHelper

@Immutable
public final class SystemHelper
extends Object

Get information about the system we're running on.

Author:

Philip Helger

Method Summary

Methods

Modifier and Type	Method and Description
static long	getFreeMemory() Returns the amount of free memory in the Java Virtual Machine.
static EJavaVersion	getJavaVersion()
static EJVMVendor	getJVMVendor()
static long	getMaxMemory() Returns the maximum amount of memory that the Java virtual machine will attempt to use.
static int	getNumberOfProcessors()
static EOperatingSystem	getOperatingSystem()
static String	getOperatingSystemName()
static EProcessorArchitecture	getProcessorArchitecture()
static Charset	getSystemCharset()
static String	getSystemCharsetName()
static Locale	getSystemLocale()
static long	getTotalMemory() Returns the total amount of memory in the Java virtual machine.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getNumberOfProcessors

@Nonnegative
public static int getNumberOfProcessors()

Returns:

The number of processors the computer has.

getProcessorArchitecture

@Nonnull
public static EProcessorArchitecture getProcessorArchitecture()

Returns:

The current processor architecture and never null.

getOperatingSystem

@Nonnull
public static EOperatingSystem getOperatingSystem()

Returns:

The operating system we're running on.

getOperatingSystemName

@Nonnull
public static String getOperatingSystemName()

Returns:

The name and version of the operating system we're running on.

getJavaVersion

@Nonnull
public static EJavaVersion getJavaVersion()

Returns:

The current Java version that is running. Never null.

getJVMVendor

@Nonnull
public static EJVMVendor getJVMVendor()

Returns:

The vendor of the Java Virtual Machine (JVM) that we're operating on.

getSystemLocale

@Nonnull
public static Locale getSystemLocale()

Returns:

The system locale.

getSystemCharset

@Nonnull
public static Charset getSystemCharset()

Returns:

The system charset.

getSystemCharsetName

@Nonnull
public static String getSystemCharsetName()

Returns:

The name of the system charset.

getFreeMemory

@Nonnegative
public static long getFreeMemory()

Returns the amount of free memory in the Java Virtual Machine.

Returns:

an approximation to the total amount of memory currently available for future allocated objects, measured in bytes.

getMaxMemory

@Nonnegative
public static long getMaxMemory()

Returns the maximum amount of memory that the Java virtual machine will attempt to use. If there is no inherent limit then the value Long.MAX_VALUE will be returned.

Returns:

the maximum amount of memory that the virtual machine will attempt to use, measured in bytes

getTotalMemory

@Nonnegative
public static long getTotalMemory()

Returns the total amount of memory in the Java virtual machine. The value returned by this method may vary over time, depending on the host environment.

Note that the amount of memory required to hold an object of any given type may be implementation-dependent.

Returns:

the total amount of memory currently available for current and future objects, measured in bytes.