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java.nio
Class DoubleBuffer  

java.lang.Object
  java.nio.Buffer
      java.nio.DoubleBuffer

All Implemented Interfaces:

java.lang.Comparable

Direct Known Subclasses:

DoubleBufferImpl, DoubleViewBufferImpl

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public abstract class DoubleBuffer

extends Buffer

implements java.lang.Comparable

Since:

1.4

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Field Summary
(package private)  int	array_offset
(package private)  double[]	backing_buffer

 

Fields inherited from class java.nio.Buffer

address, cap, limit, mark, pos

 

Constructor Summary
(package private)	DoubleBuffer(int capacity, int limit, int position, int mark)

 

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

 

Methods inherited from class java.nio.Buffer

capacity, checkArraySize, checkForOverflow, checkForOverflow, checkForUnderflow, checkForUnderflow, checkIfReadOnly, checkIndex, clear, flip, hasRemaining, isReadOnly, limit, limit, mark, position, position, remaining, reset, rewind

 

Methods inherited from class java.lang.Object

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

 

Field Detail

array_offset

int array_offset

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backing_buffer

double[] backing_buffer

Constructor Detail

DoubleBuffer

DoubleBuffer(int capacity,
             int limit,
             int position,
             int mark)

Method Detail

allocate

public static DoubleBuffer allocate(int capacity)

Allocates a new DoubleBuffer object with a given capacity.

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wrap

public static final DoubleBuffer wrap(double[] array,
                                      int offset,
                                      int length)

Wraps a double array into a DoubleBuffer object.

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wrap

public static final DoubleBuffer wrap(double[] array)

Wraps a double array into a DoubleBuffer object.

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get

public DoubleBuffer get(double[] dst,
                        int offset,
                        int length)

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

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get

public DoubleBuffer get(double[] dst)

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

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put

public DoubleBuffer put(DoubleBuffer src)

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

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put

public DoubleBuffer put(double[] src,
                        int offset,
                        int length)

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

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put

public final DoubleBuffer put(double[] src)

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

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hasArray

public final boolean hasArray()

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

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array

public final double[] array()

Returns the double array that backs this buffer.

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arrayOffset

public final int arrayOffset()

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

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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, in Double.doubleToLongBits() form Note that the hashcode is dependent on buffer content, and therefore is not useful if the buffer content may change.

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equals

public boolean equals(java.lang.Object obj)

Checks if this buffer is equal to obj.

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compareTo

public int compareTo(java.lang.Object obj)

Compares two DoubleBuffer objects.

Specified by:

compareTo in interface java.lang.Comparable

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order

public abstract ByteOrder order()

Returns the byte order of this buffer.

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get

public abstract double get()

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

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put

public abstract DoubleBuffer put(double b)

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

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get

public abstract double get(int index)

Absolute get method.

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put

public abstract DoubleBuffer put(int index,
                                 double b)

Absolute put method.

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compact

public abstract DoubleBuffer compact()

Compacts this buffer.

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isDirect

public abstract boolean isDirect()

Tells wether or not this buffer is direct.

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slice

public abstract DoubleBuffer slice()

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

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duplicate

public abstract DoubleBuffer duplicate()

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

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asReadOnlyBuffer

public abstract DoubleBuffer asReadOnlyBuffer()

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

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