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25 
26 package java.nio;
27 
28 
29 /**
30  * A typesafe enumeration for byte orders.
31  *
32  * @author Mark Reinhold
33  * @author JSR-51 Expert Group
34  * @since 1.4
35  */
36 
37 public final class ByteOrder {
38 
39     private String name;
40 
ByteOrder(String name)41     private ByteOrder(String name) {
42         this.name = name;
43     }
44 
45     /**
46      * Constant denoting big-endian byte order.  In this order, the bytes of a
47      * multibyte value are ordered from most significant to least significant.
48      */
49     public static final ByteOrder BIG_ENDIAN
50         = new ByteOrder("BIG_ENDIAN");
51 
52     /**
53      * Constant denoting little-endian byte order.  In this order, the bytes of
54      * a multibyte value are ordered from least significant to most
55      * significant.
56      */
57     public static final ByteOrder LITTLE_ENDIAN
58         = new ByteOrder("LITTLE_ENDIAN");
59 
60     /**
61      * Retrieves the native byte order of the underlying platform.
62      *
63      * <p> This method is defined so that performance-sensitive Java code can
64      * allocate direct buffers with the same byte order as the hardware.
65      * Native code libraries are often more efficient when such buffers are
66      * used.  </p>
67      *
68      * @return  The native byte order of the hardware upon which this Java
69      *          virtual machine is running
70      */
nativeOrder()71     public static ByteOrder nativeOrder() {
72         return Bits.byteOrder();
73     }
74 
75     /**
76      * Constructs a string describing this object.
77      *
78      * <p> This method returns the string <tt>"BIG_ENDIAN"</tt> for {@link
79      * #BIG_ENDIAN} and <tt>"LITTLE_ENDIAN"</tt> for {@link #LITTLE_ENDIAN}.
80      * </p>
81      *
82      * @return  The specified string
83      */
toString()84     public String toString() {
85         return name;
86     }
87 
88 }
89