| java.lang.Object java.nio.Buffer java.nio.ShortBuffer
All known Subclasses: java.nio.ShortBufferImpl,
ShortBuffer | abstract public class ShortBuffer extends Buffer implements Comparable(Code) | | A short buffer.
This class is provided as part of the JSR 239 NIO Buffer
building block. It is a subset of the
java.nio.ShortBuffer class in Java(TM) Standard Edition
version 1.4.2. Differences are noted in bold italic.
The class documentation may make reference to classes that are not
present in the building block.
I/O channels, marking and resetting, and read-only buffers
are not supported. Allocation of non-direct short buffers,
compaction, and duplication are not supported.
The following methods are omitted:
ShortBuffer allocate(int capacity)
ShortBuffer compact()
ShortBuffer duplicate()
Buffer mark()
Buffer reset()
boolean isReadOnly()
ShortBuffer asReadOnlyBuffer()
This class defines four categories of operations upon
short buffers:
Absolute and relative
ShortBuffer.get() get and
ShortBuffer.put(short) put methods that read and write
single shorts;
Relative
ShortBuffer.get(short[]) bulk get methods that transfer contiguous sequences of shorts from this buffer
into an array;
Relative
ShortBuffer.put(short[]) bulk put methods that transfer contiguous sequences of shorts from a
short array or some other short
buffer into this buffer; and
Methods for compacting, duplicating, and
ShortBuffer.sliceslicing a short buffer. JSR 239 does
not support compacting and duplicating buffers.
Short buffers can be created either by allocation, which
allocates space for the buffer's content, by
ShortBuffer.wrap(short[])wrapping an existing short array into a
buffer, or by creating a view of an existing byte
buffer. JSR 239 supports allocation of
ByteBuffer s only.
Like a byte buffer, a short buffer is either direct or non-direct. A
short buffer created via the wrap methods of this class will
be non-direct. A short buffer created as a view of a byte buffer will
be direct if, and only if, the byte buffer itself is direct. Whether or not
a short buffer is direct may be determined by invoking the
ShortBuffer.isDirect isDirect method.
Methods in this class that do not otherwise have a value to return are
specified to return the buffer upon which they are invoked. This allows
method invocations to be chained.
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Constructor Summary | |
| ShortBuffer() Constructs a new ShortBuffer . |
Method Summary | |
final public short[] | array() Returns the short array that backs this
buffer (optional operation).
Modifications to this buffer's content will cause the returned
array's content to be modified, and vice versa.
Invoke the
ShortBuffer.hasArray hasArray method before
invoking this method in order to ensure that this buffer has an
accessible backing array. | final public int | arrayOffset() Returns the offset within this buffer's backing array of the
first element of the buffer (optional
operation).
If this buffer is backed by an array then buffer position
p corresponds to array index
p + arrayOffset().
Invoke the
ShortBuffer.hasArray hasArray method before
invoking this method in order to ensure that this buffer has an
accessible backing array. | public int | compareTo(Object ob) Compares this buffer to another. | public boolean | equals(Object ob) Tells whether or not this buffer is equal to another object.
Two short buffers are equal if, and only if,
They have the same element type,
They have the same number of remaining elements, and
The two sequences of remaining elements, considered
independently of their starting positions, are pointwise equal.
A short buffer is not equal to any other type of object. | abstract public short | get() Relative get method. | abstract public short | get(int index) Absolute get method. | public ShortBuffer | get(short[] dst, int offset, int length) Relative bulk get method.
This method transfers shorts from this buffer into the
given destination array. | public ShortBuffer | get(short[] dst) Relative bulk get method.
This method transfers shorts from this buffer into the
given destination array. | final public boolean | hasArray() Tells whether or not this buffer is backed by an accessible
short array.
If this method returns true then the
ShortBuffer.array() array and
ShortBuffer.arrayOffset() arrayOffset methods
may safely be invoked. | public int | hashCode() Returns the current hash code of this buffer.
The hash code of a short buffer depends only upon its remaining
elements; that is, upon the elements from position() up to, and
including, the element at limit() - 1.
Because buffer hash codes are content-dependent, it is inadvisable
to use buffers as keys in hash maps or similar data structures unless it
is known that their contents will not change. | abstract public boolean | isDirect() Tells whether or not this short buffer is direct. | abstract public ShortBuffer | put(short s) Relative put method (optional
operation).
Writes the given short into this buffer at the current
position, and then increments the position. | abstract public ShortBuffer | put(int index, short s) Absolute put method (optional operation).
Writes the given short into this buffer at the given
index. | public ShortBuffer | put(ShortBuffer src) Relative bulk put method (optional
operation).
This method transfers the shorts remaining in the
given source buffer into this buffer. | public ShortBuffer | put(short[] src, int offset, int length) Relative bulk put method (optional
operation).
This method transfers shorts into this buffer from the
given source array. | final public ShortBuffer | put(short[] src) Relative bulk put method (optional operation).
This method transfers the entire content of the given
source short array into this buffer. | abstract public ShortBuffer | slice() Creates a new short buffer whose content is a shared
subsequence of this buffer's content.
The content of the new buffer will start at this buffer's
current position. | public String | toString() Returns a string summarizing the state of this buffer. | public static ShortBuffer | wrap(short[] array, int offset, int length) Wraps a short array into a buffer.
The new buffer will be backed by the given short array;
that is, modifications to the buffer will cause the array to be modified
and vice versa. | public static ShortBuffer | wrap(short[] array) Wraps a short array into a buffer.
The new buffer will be backed by the given short array;
that is, modifications to the buffer will cause the array to be modified
and vice versa. |
arrayOffset | int arrayOffset(Code) | | |
disposed | boolean disposed(Code) | | |
isDirect | boolean isDirect(Code) | | |
ShortBuffer | ShortBuffer()(Code) | | Constructs a new ShortBuffer .
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array | final public short[] array()(Code) | | Returns the short array that backs this
buffer (optional operation).
Modifications to this buffer's content will cause the returned
array's content to be modified, and vice versa.
Invoke the
ShortBuffer.hasArray hasArray method before
invoking this method in order to ensure that this buffer has an
accessible backing array.
The array that backs this buffer. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. throws: UnsupportedOperationException - If this buffer is notbacked by an accessible array. |
arrayOffset | final public int arrayOffset()(Code) | | Returns the offset within this buffer's backing array of the
first element of the buffer (optional
operation).
If this buffer is backed by an array then buffer position
p corresponds to array index
p + arrayOffset().
Invoke the
ShortBuffer.hasArray hasArray method before
invoking this method in order to ensure that this buffer has an
accessible backing array.
The offset within this buffer's array of the firstelement of the buffer. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. throws: UnsupportedOperationException - If this buffer is notbacked by an accessible array. |
compareTo | public int compareTo(Object ob)(Code) | | Compares this buffer to another.
Two short buffers are compared by comparing their sequences of
remaining elements lexicographically, without regard to the starting
position of each sequence within its corresponding buffer.
A short buffer is not comparable to any other type of object.
A negative integer, zero, or a positive integer as this bufferis less than, equal to, or greater than the given buffer. throws: ClassCastException - If the argument is not a short buffer. |
equals | public boolean equals(Object ob)(Code) | | Tells whether or not this buffer is equal to another object.
Two short buffers are equal if, and only if,
They have the same element type,
They have the same number of remaining elements, and
The two sequences of remaining elements, considered
independently of their starting positions, are pointwise equal.
A short buffer is not equal to any other type of object.
Parameters: ob - The object to which this buffer is to be compared. true if, and only if, this buffer is equal to thegiven object. |
get | abstract public short get()(Code) | | Relative get method. Reads the short at this
buffer's current position, and then increments the
position.
The short at the buffer's current position. throws: BufferUnderflowException - If the buffer's currentposition is not smaller than its limit. |
get | abstract public short get(int index)(Code) | | Absolute get method. Reads the short at the given
index.
Parameters: index - The index from which the short will be read. The short at the given index. throws: IndexOutOfBoundsException - If index is negativeor not smaller than the buffer's limit. |
get | public ShortBuffer get(short[] dst, int offset, int length)(Code) | | Relative bulk get method.
This method transfers shorts from this buffer into the
given destination array. If there are fewer shorts
remaining in the buffer than are required to satisfy the
request, that is, if
length > remaining(),
then no shorts are transferred and a
BufferUnderflowException is thrown.
Otherwise, this method copies length shorts
from this buffer into the given array, starting at the current
position of this buffer and at the given offset in the array.
The position of this buffer is then incremented by
length.
In other words, an invocation of this method of the form
src.get(dst, off, len) has exactly the same
effect as the loop
for (int i = off; i < off + len; i++)
dst[i] = src.get();
except that it first checks that there are sufficient
shorts in this buffer and it is potentially much more
efficient.
Parameters: dst - The array into which shorts are to be written. Parameters: offset - The offset within the array of the firstshort to be written; must be non-negative and no largerthan dst.length. Parameters: length - The maximum number of shorts to be writtento the given array; must be non-negative and no larger thandst.length - offset. This buffer. throws: BufferUnderflowException - If there are fewer thanlength shorts remaining in this buffer. throws: IndexOutOfBoundsException - If the preconditions on theoffset and length parameters do not hold. |
get | public ShortBuffer get(short[] dst)(Code) | | Relative bulk get method.
This method transfers shorts from this buffer into the
given destination array. An invocation of this method of the
form src.get(a) behaves in exactly the same way as the
invocation
src.get(a, 0, a.length)
This buffer. throws: BufferUnderflowException - If there are fewer thandst.length shorts remaining in this buffer. |
hasArray | final public boolean hasArray()(Code) | | Tells whether or not this buffer is backed by an accessible
short array.
If this method returns true then the
ShortBuffer.array() array and
ShortBuffer.arrayOffset() arrayOffset methods
may safely be invoked.
true if, and only if, this buffer is backed byan array and is not read-only. JSR 239 does not supportread-only buffers. |
hashCode | public int hashCode()(Code) | | Returns the current hash code of this buffer.
The hash code of a short buffer depends only upon its remaining
elements; that is, upon the elements from position() up to, and
including, the element at limit() - 1.
Because buffer hash codes are content-dependent, it is inadvisable
to use buffers as keys in hash maps or similar data structures unless it
is known that their contents will not change.
The current hash code of this buffer |
isDirect | abstract public boolean isDirect()(Code) | | Tells whether or not this short buffer is direct.
true if, and only if, this buffer is direct. |
put | abstract public ShortBuffer put(short s)(Code) | | Relative put method (optional
operation).
Writes the given short into this buffer at the current
position, and then increments the position.
Parameters: s - The short to be written. This buffer. throws: BufferOverflowException - If this buffer's currentposition is not smaller than its limit. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. |
put | abstract public ShortBuffer put(int index, short s)(Code) | | Absolute put method (optional operation).
Writes the given short into this buffer at the given
index.
Parameters: index - The index at which the short will be written. Parameters: s - The short value to be written. This buffer. throws: IndexOutOfBoundsException - If index is negativeor not smaller than the buffer's limit. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. |
put | public ShortBuffer put(ShortBuffer src)(Code) | | Relative bulk put method (optional
operation).
This method transfers the shorts remaining in the
given source buffer into this buffer. If there are more
shorts remaining in the source buffer than in this buffer,
that is, if
src.remaining() > remaining(),
then no shorts are transferred and a
BufferOverflowException is thrown.
Otherwise, this method copies
n = src.remaining() shorts from
the given buffer into this buffer, starting at each buffer's
current position. The positions of both buffers are then
incremented by n.
In other words, an invocation of this method of the form
dst.put(src) has exactly the same effect as the loop
while (src.hasRemaining())
dst.put(src.get());
except that it first checks that there is sufficient space in
this buffer and it is potentially much more efficient.
Parameters: src - The source buffer from which shorts are to beread; must not be this buffer. This buffer. throws: BufferOverflowException - If there is insufficient spacein this buffer for the remaining shorts in the sourcebuffer. throws: IllegalArgumentException - If the source buffer is this buffer. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. |
put | public ShortBuffer put(short[] src, int offset, int length)(Code) | | Relative bulk put method (optional
operation).
This method transfers shorts into this buffer from the
given source array. If there are more shorts to be copied
from the array than remain in this buffer, that is, if
length > remaining(),
then no shorts are transferred and a
BufferOverflowException is thrown.
Otherwise, this method copies length shorts
from the given array into this buffer, starting at the given
offset in the array and at the current position of this buffer.
The position of this buffer is then incremented by
length.
In other words, an invocation of this method of the form
dst.put(src, off, len) has exactly the same
effect as the loop
for (int i = off; i < off + len; i++)
dst.put(a[i]);
except that it first checks that there is sufficient space in
this buffer and it is potentially much more efficient.
Parameters: src - The array from which shorts are to be read. Parameters: offset - The offset within the array of the firstshort to be read; must be non-negative and no larger thanarray.length. Parameters: length - The number of shorts to be read from thegiven array; must be non-negative and no larger thanarray.length - offset. This buffer. throws: BufferOverflowException - If there is insufficient spacein this buffer. throws: IndexOutOfBoundsException - If the preconditions on theoffset and length parameters do not hold. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. |
put | final public ShortBuffer put(short[] src)(Code) | | Relative bulk put method (optional operation).
This method transfers the entire content of the given
source short array into this buffer. An invocation of
this method of the form dst.put(a) behaves in exactly
the same way as the invocation
dst.put(a, 0, a.length)
This buffer. throws: BufferOverflowException - If there is insufficient spacein this buffer. throws: ReadOnlyBufferException - If this buffer isread-only. JSR 239 does not support read-only buffer orthe ReadOnlyBufferException class. |
slice | abstract public ShortBuffer slice()(Code) | | Creates a new short buffer whose content is a shared
subsequence of this buffer's content.
The content of the new buffer will start at this buffer's
current position. Changes to this buffer's content will be
visible in the new buffer, and vice versa; the two buffers'
position, limit, and mark values will be independent. JSR
239 does not support the mark.
The new buffer's position will be zero, its capacity and
its limit will be the number of shorts remaining in this
buffer, and its mark will be undefined. The new buffer will be
direct if, and only if, this buffer is direct, and it will be
read-only if, and only if, this buffer is read-only. JSR
239 does not support the mark or read-only buffers.
The new short buffer. |
toString | public String toString()(Code) | | Returns a string summarizing the state of this buffer.
A summary string |
wrap | public static ShortBuffer wrap(short[] array, int offset, int length)(Code) | | Wraps a short array into a buffer.
The new buffer will be backed by the given short array;
that is, modifications to the buffer will cause the array to be modified
and vice versa. The new buffer's capacity will be
array.length, its position will be offset, its limit
will be offset + length, and its mark will be undefined. Its
ShortBuffer.array backing array will be the given array, and
its
ShortBuffer.arrayOffset array offset will be zero.
Parameters: array - The array that will back the new buffer Parameters: offset - The offset of the subarray to be used; must be non-negative andno larger than array.length. The new buffer's positionwill be set to this value. Parameters: length - The length of the subarray to be used;must be non-negative and no larger thanarray.length - offset.The new buffer's limit will be set to offset + length. The new short buffer throws: IndexOutOfBoundsException - If the preconditions on the offset and lengthparameters do not hold |
wrap | public static ShortBuffer wrap(short[] array)(Code) | | Wraps a short array into a buffer.
The new buffer will be backed by the given short array;
that is, modifications to the buffer will cause the array to be modified
and vice versa. The new buffer's capacity and limit will be
array.length, its position will be zero, and its mark will be
undefined. Its
ShortBuffer.array backing array will be the
given array, and its
ShortBuffer.arrayOffset array offset will
be zero.
Parameters: array - The array that will back this buffer The new short buffer |
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