xdean.jex.util.lang

类 UnsafeUtil

java.lang.Object

xdean.jex.util.lang.UnsafeUtil

public class UnsafeUtil
extends Object

构造器概要

构造器

构造器和说明
UnsafeUtil()

方法概要

限定符和类型	方法和说明
static long	addressOf(Object o) Get the memory address of the given object.
static long	getHeaderSize()
static sun.misc.Unsafe	getUnsafe()
static boolean	isUsecompressedOops() Determined whether the vm use -XX:+UseCompressedOops.
static long	refSize() Get the size of reference.
static long	refSizeOf(Class<?> clz) Get the size of reference.
static long	sizeOf(Class<?> clz) Measure the size of the given class.

从类继承的方法 java.lang.Object

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

构造器详细资料

UnsafeUtil

public UnsafeUtil()

方法详细资料

getUnsafe

public static sun.misc.Unsafe getUnsafe()

addressOf

public static long addressOf(Object o)

Get the memory address of the given object.

参数:

o -

返回:

sizeOf

public static long sizeOf(Class<?> clz)

Measure the size of the given class.

参数:

clz -

返回:

refSize

public static long refSize()

Get the size of reference.(considered UseCompressedOops)
If you want to get the actual address size, use Unsafe.addressSize()

返回:

ref size

refSizeOf

public static long refSizeOf(Class<?> clz)

Get the size of reference.(considered UseCompressedOops)
If the class is primitive type, return it's actual size.

参数:

clz -

返回:

getHeaderSize

public static long getHeaderSize()

isUsecompressedOops

public static boolean isUsecompressedOops()

Determined whether the vm use -XX:+UseCompressedOops.

返回:

If it's running on a 32 bit vm, it also return true;