java.nio.Buffer
java.nio.CharBuffer
java.nio.HeapCharBuffer
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java.lang.Object
A read/write HeapCharBuffer.
| Field Summary |
| Fields inherited from class java.nio.CharBuffer |
hb, isReadOnly, offset |
| Fields inherited from class java.nio.Buffer |
address |
| Constructor Summary | |
(package private) |
HeapCharBuffer(char[] buf,
int off,
int len)
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protected |
HeapCharBuffer(char[] buf,
int mark,
int pos,
int lim,
int cap,
int off)
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(package private) |
HeapCharBuffer(int cap,
int lim)
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| Method Summary | |
CharBuffer |
asReadOnlyBuffer()
Creates a new, read-only character buffer that shares this buffer's content. |
CharBuffer |
compact()
Compacts this buffer (optional operation). |
CharBuffer |
duplicate()
Creates a new character buffer that shares this buffer's content. |
char |
get()
Relative get method. |
CharBuffer |
get(char[] dst,
int offset,
int length)
Relative bulk get method. |
char |
get(int i)
Absolute get method. |
boolean |
isDirect()
Tells whether or not this character buffer is direct. |
boolean |
isReadOnly()
Tells whether or not this buffer is read-only. |
protected int |
ix(int i)
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ByteOrder |
order()
Retrieves this buffer's byte order. |
CharBuffer |
put(char x)
Relative put method (optional operation). |
CharBuffer |
put(char[] src,
int offset,
int length)
Relative bulk put method (optional operation). |
CharBuffer |
put(CharBuffer src)
Relative bulk put method (optional operation). |
CharBuffer |
put(int i,
char x)
Absolute put method (optional operation). |
CharBuffer |
slice()
Creates a new character buffer whose content is a shared subsequence of this buffer's content. |
CharSequence |
subSequence(int start,
int end)
Creates a new character buffer that represents the specified subsequence of this buffer, relative to the current position. |
(package private) String |
toString(int start,
int end)
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| Methods inherited from class java.nio.CharBuffer |
allocate, array, arrayOffset, charAt, compareTo, equals, get, hasArray, hashCode, length, put, put, put, toString, wrap, wrap, wrap, wrap |
| Methods inherited from class java.nio.Buffer |
capacity, checkBounds, checkIndex, checkIndex, clear, flip, hasRemaining, limit, limit, mark, markValue, nextGetIndex, nextGetIndex, nextPutIndex, nextPutIndex, position, position, remaining, reset, rewind |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
HeapCharBuffer(int cap,
int lim)
HeapCharBuffer(char[] buf,
int off,
int len)
protected HeapCharBuffer(char[] buf,
int mark,
int pos,
int lim,
int cap,
int off)
| Method Detail |
public CharBuffer slice()
CharBufferThe 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.
The new buffer's position will be zero, its capacity and its limit will be the number of characters 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.
slice in class CharBufferpublic CharBuffer duplicate()
CharBufferThe content of the new buffer will be that of this buffer. 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.
The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer. 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.
duplicate in class CharBufferpublic CharBuffer asReadOnlyBuffer()
CharBufferThe content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer; the new buffer itself, however, will be read-only and will not allow the shared content to be modified. The two buffers' position, limit, and mark values will be independent.
The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer.
If this buffer is itself read-only then this method behaves in
exactly the same way as the duplicate method.
asReadOnlyBuffer in class CharBufferprotected int ix(int i)
public char get()
CharBuffer
get in class CharBufferpublic char get(int i)
CharBuffer
get in class CharBufferi - The index from which the character will be read
public CharBuffer get(char[] dst,
int offset,
int length)
CharBuffer This method transfers characters from this buffer into the given
destination array. If there are fewer characters remaining in the
buffer than are required to satisfy the request, that is, if
length > remaining(), then no
characters are transferred and a BufferUnderflowException is
thrown.
Otherwise, this method copies length characters 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 characters in
this buffer and it is potentially much more efficient.
get in class CharBufferdst - The array into which characters are to be writtenoffset - The offset within the array of the first character to be
written; must be non-negative and no larger than
dst.lengthlength - The maximum number of characters to be written to the given
array; must be non-negative and no larger than
dst.length - offset
public boolean isDirect()
CharBuffer
isDirect in class CharBufferpublic boolean isReadOnly()
Buffer
isReadOnly in class Bufferpublic CharBuffer put(char x)
CharBufferWrites the given character into this buffer at the current position, and then increments the position.
put in class CharBufferx - The character to be written
public CharBuffer put(int i,
char x)
CharBufferWrites the given character into this buffer at the given index.
put in class CharBufferi - The index at which the character will be writtenx - The character value to be written
public CharBuffer put(char[] src,
int offset,
int length)
CharBuffer This method transfers characters into this buffer from the given
source array. If there are more characters to be copied from the array
than remain in this buffer, that is, if
length > remaining(), then no
characters are transferred and a BufferOverflowException is
thrown.
Otherwise, this method copies length characters 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.
put in class CharBuffersrc - The array from which characters are to be readoffset - The offset within the array of the first character to be read;
must be non-negative and no larger than array.lengthlength - The number of characters to be read from the given array;
must be non-negative and no larger than
array.length - offset
public CharBuffer put(CharBuffer src)
CharBuffer This method transfers the characters remaining in the given source
buffer into this buffer. If there are more characters remaining in the
source buffer than in this buffer, that is, if
src.remaining() > remaining(),
then no characters are transferred and a BufferOverflowException is thrown.
Otherwise, this method copies n = src.remaining() characters 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.
put in class CharBuffersrc - The source buffer from which characters are to be read;
must not be this buffer
public CharBuffer compact()
CharBufferThe characters between the buffer's current position and its limit, if any, are copied to the beginning of the buffer. That is, the character at index p = position() is copied to index zero, the character at index p + 1 is copied to index one, and so forth until the character at index limit() - 1 is copied to index n = limit() - 1 - p. The buffer's position is then set to n+1 and its limit is set to its capacity. The mark, if defined, is discarded.
The buffer's position is set to the number of characters copied, rather than to zero, so that an invocation of this method can be followed immediately by an invocation of another relative put method.
compact in class CharBuffer
String toString(int start,
int end)
toString in class CharBuffer
public CharSequence subSequence(int start,
int end)
CharBufferThe new buffer will share this buffer's content; that is, if the content of this buffer is mutable then modifications to one buffer will cause the other to be modified. The new buffer's capacity will be that of this buffer, its position will be position() + start, and its limit will be position() + end. 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.
subSequence in interface CharSequencesubSequence in class CharBufferstart - The index, relative to the current position, of the first
character in the subsequence; must be non-negative and no larger
than remaining()end - The index, relative to the current position, of the character
following the last character in the subsequence; must be no
smaller than start and no larger than
remaining()
public ByteOrder order()
CharBuffer The byte order of a character buffer created by allocation or by
wrapping an existing char array is the native order of the underlying
hardware. The byte order of a character buffer created as a view of a byte buffer is that of the
byte buffer at the moment that the view is created.
order in class CharBuffer
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