/*
* Copyright ( c ) 2000 , 2013 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation . Oracle designates this
* particular file as subject to the " Classpath " exception as provided
* by Oracle in the LICENSE file that accompanied this code .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
package java.nio;
import jdk.internal.misc.Unsafe;
/**
* A typesafe enumeration for byte orders .
*
* @ author Mark Reinhold
* @ author JSR - 51 Expert Group
* @ since 1 . 4
*/
public final class ByteOrder {
private String name;
private ByteOrder(String name) {
this .name = name;
}
/**
* Constant denoting big - endian byte order . In this order , the bytes of a
* multibyte value are ordered from most significant to least significant .
*/
public static final ByteOrder BIG_ENDIAN
= new ByteOrder("BIG_ENDIAN" );
/**
* Constant denoting little - endian byte order . In this order , the bytes of
* a multibyte value are ordered from least significant to most
* significant .
*/
public static final ByteOrder LITTLE_ENDIAN
= new ByteOrder("LITTLE_ENDIAN" );
// Retrieve the native byte order. It's used early during bootstrap, and
// must be initialized after BIG_ENDIAN and LITTLE_ENDIAN.
private static final ByteOrder NATIVE_ORDER
= Unsafe.getUnsafe().isBigEndian()
? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
/**
* Retrieves the native byte order of the underlying platform .
*
* < p > This method is defined so that performance - sensitive Java code can
* allocate direct buffers with the same byte order as the hardware .
* Native code libraries are often more efficient when such buffers are
* used . < / p >
*
* @ return The native byte order of the hardware upon which this Java
* virtual machine is running
*/
public static ByteOrder nativeOrder() {
return NATIVE_ORDER;
}
/**
* Constructs a string describing this object .
*
* < p > This method returns the string
* { @ code " BIG_ENDIAN " } for { @ link # BIG_ENDIAN } and
* { @ code " LITTLE_ENDIAN " } for { @ link # LITTLE_ENDIAN } .
*
* @ return The specified string
*/
public String toString() {
return name;
}
}
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