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java.nio
Class Buffer
java.lang.Objectjava.nio.Buffer
- Direct Known Subclasses:
- ByteBuffer, CharBuffer, DoubleBuffer, FloatBuffer, IntBuffer, LongBuffer, ShortBuffer
- public abstract class Buffer
- extends java.lang.Object
- Since:
- 1.4
| Field Summary | |
(package private) gnu.classpath.Pointer |
address
|
(package private) int |
cap
|
(package private) int |
limit
|
(package private) int |
mark
|
(package private) int |
pos
|
| Constructor Summary | |
(package private) |
Buffer(int capacity,
int limit,
int position,
int mark)
Creates a new Buffer. |
| Method Summary | |
int |
capacity()
Retrieves the capacity of the buffer. |
(package private) static void |
checkArraySize(int arraylength,
int offset,
int length)
Checks whether an array is large enough to hold the given number of elements at the given offset. |
(package private) void |
checkForOverflow()
Checks for overflow. |
(package private) void |
checkForOverflow(int length)
Checks for overflow. |
(package private) void |
checkForUnderflow()
Checks for underflow. |
(package private) void |
checkForUnderflow(int length)
Checks for underflow. |
(package private) void |
checkIfReadOnly()
Checks if buffer is read-only. |
(package private) void |
checkIndex(int index)
Checks if index is negative or not smaller than the buffer's limit. |
Buffer |
clear()
Clears the buffer. |
Buffer |
flip()
Flips the buffer. |
boolean |
hasRemaining()
Tells whether the buffer has remaining data to read or not. |
abstract boolean |
isReadOnly()
Tells whether this buffer is read only or not. |
int |
limit()
Retrieves the current limit of the buffer. |
Buffer |
limit(int newLimit)
Sets this buffer's limit. |
Buffer |
mark()
Sets this buffer's mark at its position. |
int |
position()
Retrieves the current position of this buffer. |
Buffer |
position(int newPosition)
Sets this buffer's position. |
int |
remaining()
Returns the number of elements between the current position and the limit. |
Buffer |
reset()
Resets this buffer's position to the previously-marked position. |
Buffer |
rewind()
Rewinds this buffer. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
cap
int cap
limit
int limit
pos
int pos
mark
int mark
address
gnu.classpath.Pointer address
| Constructor Detail |
Buffer
Buffer(int capacity,
int limit,
int position,
int mark)
- Creates a new Buffer.
Should be package private.
| Method Detail |
capacity
public final int capacity()
- Retrieves the capacity of the buffer.
clear
public final Buffer clear()
- Clears the buffer.
flip
public final Buffer flip()
- Flips the buffer.
hasRemaining
public final boolean hasRemaining()
- Tells whether the buffer has remaining data to read or not.
isReadOnly
public abstract boolean isReadOnly()
- Tells whether this buffer is read only or not.
limit
public final int limit()
- Retrieves the current limit of the buffer.
limit
public final Buffer limit(int newLimit)
- Sets this buffer's limit.
mark
public final Buffer mark()
- Sets this buffer's mark at its position.
position
public final int position()
- Retrieves the current position of this buffer.
position
public final Buffer position(int newPosition)
- Sets this buffer's position. If the mark is defined and larger than the
new position then it is discarded.
remaining
public final int remaining()
- Returns the number of elements between the current position and the limit.
reset
public final Buffer reset()
- Resets this buffer's position to the previously-marked position.
rewind
public final Buffer rewind()
- Rewinds this buffer. The position is set to zero and the mark
is discarded.
checkForUnderflow
final void checkForUnderflow()
- Checks for underflow. This method is used internally to check
whether a buffer has enough elements left to satisfy a read
request.
checkForUnderflow
final void checkForUnderflow(int length)
- Checks for underflow. This method is used internally to check
whether a buffer has enough elements left to satisfy a read
request for a given number of elements.
checkForOverflow
final void checkForOverflow()
- Checks for overflow. This method is used internally to check
whether a buffer has enough space left to satisfy a write
request.
checkForOverflow
final void checkForOverflow(int length)
- Checks for overflow. This method is used internally to check
whether a buffer has enough space left to satisfy a write
request for a given number of elements.
checkIndex
final void checkIndex(int index)
- Checks if index is negative or not smaller than the buffer's
limit. This method is used internally to check whether
an indexed request can be fulfilled.
checkIfReadOnly
final void checkIfReadOnly()
- Checks if buffer is read-only. This method is used internally to
check if elements can be put into a buffer.
checkArraySize
static final void checkArraySize(int arraylength,
int offset,
int length)
- Checks whether an array is large enough to hold the given number of
elements at the given offset. This method is used internally to
check if an array is big enough.
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DETAIL: FIELD | CONSTR | METHOD | ||||||||