java.nio

Class LongBuffer

public abstract class LongBuffer extends Buffer implements Comparable<LongBuffer>

Since: 1.4

Method Summary
static LongBuffer	allocate(int capacity) Allocates a new `LongBuffer` object with a given capacity.
long[]	array() Returns the `long` array that backs this buffer.
int	arrayOffset() Returns the offset within this buffer's backing array of the first element.
abstract LongBuffer	asReadOnlyBuffer() Creates a new read-only `LongBuffer` that shares this buffer's content.
abstract LongBuffer	compact() Compacts this buffer.
int	compareTo(LongBuffer other) Compares two `LongBuffer` objects.
abstract LongBuffer	duplicate() Creates a new `LongBuffer` that shares this buffer's content.
boolean	equals(Object obj) Checks if this buffer is equal to obj.
LongBuffer	get(long[] dst, int offset, int length) This method transfers `long`s from this buffer into the given destination array.
LongBuffer	get(long[] dst) This method transfers `long`s from this buffer into the given destination array.
abstract long	get() Reads the `long` at this buffer's current position, and then increments the position.
abstract long	get(int index) Absolute get method.
boolean	hasArray() Tells whether ot not this buffer is backed by an accessible `long` array.
int	hashCode() Calculates a hash code for this buffer.
abstract boolean	isDirect() Tells wether or not this buffer is direct.
abstract ByteOrder	order() Returns the byte order of this buffer.
LongBuffer	put(LongBuffer src) Writes the content of the the `LongBUFFER` src into the buffer.
LongBuffer	put(long[] src, int offset, int length) Writes the content of the the `long array` src into the buffer.
LongBuffer	put(long[] src) Writes the content of the the `long array` src into the buffer.
abstract LongBuffer	put(long b) Writes the `long` at this buffer's current position, and then increments the position.
abstract LongBuffer	put(int index, long b) Absolute put method.
abstract LongBuffer	slice() Creates a new `LongBuffer` whose content is a shared subsequence of this buffer's content.
static LongBuffer	wrap(long[] array, int offset, int length) Wraps a `long` array into a `LongBuffer` object.
static LongBuffer	wrap(long[] array) Wraps a `long` array into a `LongBuffer` object.

Method Detail

allocate

public static LongBuffer allocate(int capacity)

Allocates a new LongBuffer object with a given capacity.

array

public final long[] array()

Returns the long array that backs this buffer.

Throws: ReadOnlyBufferException If this buffer is read-only. UnsupportedOperationException If this buffer is not backed by an accessible array.

arrayOffset

public final int arrayOffset()

Returns the offset within this buffer's backing array of the first element.

Throws: ReadOnlyBufferException If this buffer is read-only. UnsupportedOperationException If this buffer is not backed by an accessible array.

asReadOnlyBuffer

public abstract LongBuffer asReadOnlyBuffer()

Creates a new read-only LongBuffer that shares this buffer's content.

compact

public abstract LongBuffer compact()

Compacts this buffer.

Throws: ReadOnlyBufferException If this buffer is read-only.

compareTo

public int compareTo(LongBuffer other)

Compares two LongBuffer objects.

Throws: ClassCastException If obj is not an object derived from LongBuffer.

duplicate

public abstract LongBuffer duplicate()

Creates a new LongBuffer that shares this buffer's content.

equals

public boolean equals(Object obj)

Checks if this buffer is equal to obj.

get

public LongBuffer get(long[] dst, int offset, int length)

This method transfers longs from this buffer into the given destination array. Before the transfer, it checks if there are fewer than length longs remaining in this buffer.

Parameters: dst The destination array offset The offset within the array of the first long to be written; must be non-negative and no larger than dst.length. length The maximum number of bytes to be written to the given array; must be non-negative and no larger than dst.length - offset.

Throws: BufferUnderflowException If there are fewer than length longs remaining in this buffer. IndexOutOfBoundsException If the preconditions on the offset and length parameters do not hold.

get

public LongBuffer get(long[] dst)

This method transfers longs from this buffer into the given destination array.

Parameters: dst The byte array to write into.

Throws: BufferUnderflowException If there are fewer than dst.length longs remaining in this buffer.

get

public abstract long get()

Reads the long at this buffer's current position, and then increments the position.

Throws: BufferUnderflowException If there are no remaining longs in this buffer.

get

public abstract long get(int index)

Absolute get method.

Throws: IndexOutOfBoundsException If index is negative or not smaller than the buffer's limit.

hasArray

public final boolean hasArray()

Tells whether ot not this buffer is backed by an accessible long array.

hashCode

public int hashCode()

Calculates a hash code for this buffer. This is done with long arithmetic, where ** represents exponentiation, by this formula:

s[position()] + 31 + (s[position()+1] + 30)*31**1 + ... +
 (s[limit()-1]+30)*31**(limit()-1)

. Where s is the buffer data. Note that the hashcode is dependent on buffer content, and therefore is not useful if the buffer content may change.

Returns: the hash code (casted to int)

isDirect

public abstract boolean isDirect()

Tells wether or not this buffer is direct.

order

public abstract ByteOrder order()

Returns the byte order of this buffer.

put

public LongBuffer put(LongBuffer src)

Writes the content of the the LongBUFFER src into the buffer. Before the transfer, it checks if there is fewer than src.remaining() space remaining in this buffer.

Parameters: src The source data.

Throws: BufferOverflowException If there is insufficient space in this buffer for the remaining longs in the source buffer. IllegalArgumentException If the source buffer is this buffer. ReadOnlyBufferException If this buffer is read-only.

put

public LongBuffer put(long[] src, int offset, int length)

Writes the content of the the long array src into the buffer. Before the transfer, it checks if there is fewer than length space remaining in this buffer.

Parameters: src The array to copy into the buffer. offset The offset within the array of the first byte to be read; must be non-negative and no larger than src.length. length The number of bytes to be read from the given array; must be non-negative and no larger than src.length - offset.

Throws: BufferOverflowException If there is insufficient space in this buffer for the remaining longs in the source array. IndexOutOfBoundsException If the preconditions on the offset and length parameters do not hold ReadOnlyBufferException If this buffer is read-only.

put

public final LongBuffer put(long[] src)

Writes the content of the the long array src into the buffer.

Parameters: src The array to copy into the buffer.

Throws: BufferOverflowException If there is insufficient space in this buffer for the remaining longs in the source array. ReadOnlyBufferException If this buffer is read-only.

put

public abstract LongBuffer put(long b)

Writes the long at this buffer's current position, and then increments the position.

Throws: BufferOverflowException If there no remaining longs in this buffer. ReadOnlyBufferException If this buffer is read-only.

put

public abstract LongBuffer put(int index, long b)

Absolute put method.

Throws: IndexOutOfBoundsException If index is negative or not smaller than the buffer's limit. ReadOnlyBufferException If this buffer is read-only.

slice

public abstract LongBuffer slice()

Creates a new LongBuffer whose content is a shared subsequence of this buffer's content.

wrap

public static final LongBuffer wrap(long[] array, int offset, int length)

Wraps a long array into a LongBuffer object.

Throws: IndexOutOfBoundsException If the preconditions on the offset and length parameters do not hold

wrap

public static final LongBuffer wrap(long[] array)

Wraps a long array into a LongBuffer object.