UnpooledDirectByteBuf (Netty 4.1.109.Final API文档

java.lang.Object
- io.netty.buffer.ByteBuf
- - io.netty.buffer.AbstractByteBuf
  - - io.netty.buffer.AbstractReferenceCountedByteBuf
    - - io.netty.buffer.UnpooledDirectByteBuf

所有已实现的接口:

ByteBufConvertible, ReferenceCounted, java.lang.Comparable<ByteBuf>

直接已知子类:

UnpooledUnsafeDirectByteBuf
```
public class UnpooledDirectByteBuf
extends AbstractReferenceCountedByteBuf
```
A NIO ByteBuffer based buffer. It is recommended to use AbstractByteBufAllocator.directBuffer(int, int), Unpooled.directBuffer(int) and Unpooled.wrappedBuffer(ByteBuffer) instead of calling the constructor explicitly.

构造器概要

构造器
限定符	构造器和说明
`protected`	`UnpooledDirectByteBuf(ByteBufAllocator alloc, java.nio.ByteBuffer initialBuffer, int maxCapacity)` Creates a new direct buffer by wrapping the specified initial buffer.
	`UnpooledDirectByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity)` Creates a new direct buffer.

方法概要

All Methods Instance Methods Concrete Methods
限定符和类型	方法和说明
`protected byte`	`_getByte(int index)`
`protected int`	`_getInt(int index)`
`protected int`	`_getIntLE(int index)`
`protected long`	`_getLong(int index)`
`protected long`	`_getLongLE(int index)`
`protected short`	`_getShort(int index)`
`protected short`	`_getShortLE(int index)`
`protected int`	`_getUnsignedMedium(int index)`
`protected int`	`_getUnsignedMediumLE(int index)`
`protected void`	`_setByte(int index, int value)`
`protected void`	`_setInt(int index, int value)`
`protected void`	`_setIntLE(int index, int value)`
`protected void`	`_setLong(int index, long value)`
`protected void`	`_setLongLE(int index, long value)`
`protected void`	`_setMedium(int index, int value)`
`protected void`	`_setMediumLE(int index, int value)`
`protected void`	`_setShort(int index, int value)`
`protected void`	`_setShortLE(int index, int value)`
`ByteBufAllocator`	`alloc()` Returns the `ByteBufAllocator` which created this buffer.
`protected java.nio.ByteBuffer`	`allocateDirect(int initialCapacity)` Allocate a new direct `ByteBuffer` with the given initialCapacity.
`byte[]`	`array()` Returns the backing byte array of this buffer.
`int`	`arrayOffset()` Returns the offset of the first byte within the backing byte array of this buffer.
`int`	`capacity()` Returns the number of bytes (octets) this buffer can contain.
`ByteBuf`	`capacity(int newCapacity)` Adjusts the capacity of this buffer.
`ByteBuf`	`copy(int index, int length)` Returns a copy of this buffer's sub-region.
`protected void`	`deallocate()` Called once `AbstractReferenceCountedByteBuf.refCnt()` is equals 0.
`protected void`	`freeDirect(java.nio.ByteBuffer buffer)` Free a direct `ByteBuffer`
`byte`	`getByte(int index)` Gets a byte at the specified absolute `index` in this buffer.
`ByteBuf`	`getBytes(int index, byte[] dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`ByteBuf`	`getBytes(int index, java.nio.ByteBuffer dst)` Transfers this buffer's data to the specified destination starting at the specified absolute `index` until the destination's position reaches its limit.
`ByteBuf`	`getBytes(int index, ByteBuf dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`int`	`getBytes(int index, java.nio.channels.FileChannel out, long position, int length)` Transfers this buffer's data starting at the specified absolute `index` to the specified channel starting at the given file position.
`int`	`getBytes(int index, java.nio.channels.GatheringByteChannel out, int length)` Transfers this buffer's data to the specified channel starting at the specified absolute `index`.
`ByteBuf`	`getBytes(int index, java.io.OutputStream out, int length)` Transfers this buffer's data to the specified stream starting at the specified absolute `index`.
`int`	`getInt(int index)` Gets a 32-bit integer at the specified absolute `index` in this buffer.
`long`	`getLong(int index)` Gets a 64-bit long integer at the specified absolute `index` in this buffer.
`short`	`getShort(int index)` Gets a 16-bit short integer at the specified absolute `index` in this buffer.
`int`	`getUnsignedMedium(int index)` Gets an unsigned 24-bit medium integer at the specified absolute `index` in this buffer.
`boolean`	`hasArray()` Returns `true` if and only if this buffer has a backing byte array.
`boolean`	`hasMemoryAddress()` Returns `true` if and only if this buffer has a reference to the low-level memory address that points to the backing data.
`java.nio.ByteBuffer`	`internalNioBuffer(int index, int length)` Internal use only: Exposes the internal NIO buffer.
`boolean`	`isContiguous()` Returns `true` if this `ByteBuf` implementation is backed by a single memory region.
`boolean`	`isDirect()` Returns `true` if and only if this buffer is backed by an NIO direct buffer.
`long`	`memoryAddress()` Returns the low-level memory address that point to the first byte of ths backing data.
`java.nio.ByteBuffer`	`nioBuffer(int index, int length)` Exposes this buffer's sub-region as an NIO `ByteBuffer`.
`int`	`nioBufferCount()` Returns the maximum number of NIO `ByteBuffer`s that consist this buffer.
`java.nio.ByteBuffer[]`	`nioBuffers(int index, int length)` Exposes this buffer's bytes as an NIO `ByteBuffer`'s for the specified index and length The returned buffer either share or contains the copied content of this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer.
`java.nio.ByteOrder`	`order()` Returns the endianness of this buffer.
`ByteBuf`	`readBytes(byte[] dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the current `readerIndex` and increases the `readerIndex` by the number of the transferred bytes (= `length`).
`ByteBuf`	`readBytes(java.nio.ByteBuffer dst)` Transfers this buffer's data to the specified destination starting at the current `readerIndex` until the destination's position reaches its limit, and increases the `readerIndex` by the number of the transferred bytes.
`int`	`readBytes(java.nio.channels.FileChannel out, long position, int length)` Transfers this buffer's data starting at the current `readerIndex` to the specified channel starting at the given file position.
`int`	`readBytes(java.nio.channels.GatheringByteChannel out, int length)` Transfers this buffer's data to the specified stream starting at the current `readerIndex`.
`ByteBuf`	`readBytes(java.io.OutputStream out, int length)` Transfers this buffer's data to the specified stream starting at the current `readerIndex`.
`ByteBuf`	`setByte(int index, int value)` Sets the specified byte at the specified absolute `index` in this buffer.
`ByteBuf`	`setBytes(int index, byte[] src, int srcIndex, int length)` Transfers the specified source array's data to this buffer starting at the specified absolute `index`.
`ByteBuf`	`setBytes(int index, java.nio.ByteBuffer src)` Transfers the specified source buffer's data to this buffer starting at the specified absolute `index` until the source buffer's position reaches its limit.
`ByteBuf`	`setBytes(int index, ByteBuf src, int srcIndex, int length)` Transfers the specified source buffer's data to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, java.nio.channels.FileChannel in, long position, int length)` Transfers the content of the specified source channel starting at the given file position to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, java.io.InputStream in, int length)` Transfers the content of the specified source stream to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, java.nio.channels.ScatteringByteChannel in, int length)` Transfers the content of the specified source channel to this buffer starting at the specified absolute `index`.
`ByteBuf`	`setInt(int index, int value)` Sets the specified 32-bit integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setLong(int index, long value)` Sets the specified 64-bit long integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setMedium(int index, int value)` Sets the specified 24-bit medium integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setShort(int index, int value)` Sets the specified 16-bit short integer at the specified absolute `index` in this buffer.
`ByteBuf`	`unwrap()` Return the underlying buffer instance if this buffer is a wrapper of another buffer.

从类继承的方法 io.netty.buffer.AbstractReferenceCountedByteBuf
refCnt, release, release, resetRefCnt, retain, retain, setRefCnt, touch, touch

从类继承的方法 io.netty.buffer.AbstractByteBuf
adjustMarkers, asReadOnly, bytesBefore, bytesBefore, bytesBefore, checkDstIndex, checkDstIndex, checkIndex, checkIndex, checkNewCapacity, checkReadableBytes, checkSrcIndex, clear, compareTo, copy, discardReadBytes, discardSomeReadBytes, duplicate, ensureAccessible, ensureWritable, ensureWritable, equals, forEachByte, forEachByte, forEachByteDesc, forEachByteDesc, getBoolean, getBytes, getBytes, getBytes, getChar, getCharSequence, getDouble, getFloat, getIntLE, getLongLE, getMedium, getMediumLE, getShortLE, getUnsignedByte, getUnsignedInt, getUnsignedIntLE, getUnsignedMediumLE, getUnsignedShort, getUnsignedShortLE, hashCode, indexOf, isReadable, isReadable, isReadOnly, isWritable, isWritable, markReaderIndex, markWriterIndex, maxCapacity, maxCapacity, maxWritableBytes, newSwappedByteBuf, nioBuffer, nioBuffers, order, readableBytes, readBoolean, readByte, readBytes, readBytes, readBytes, readBytes, readBytes, readChar, readCharSequence, readDouble, readerIndex, readerIndex, readFloat, readInt, readIntLE, readLong, readLongLE, readMedium, readMediumLE, readRetainedSlice, readShort, readShortLE, readSlice, readUnsignedByte, readUnsignedInt, readUnsignedIntLE, readUnsignedMedium, readUnsignedMediumLE, readUnsignedShort, readUnsignedShortLE, resetReaderIndex, resetWriterIndex, retainedDuplicate, retainedSlice, retainedSlice, setBoolean, setBytes, setBytes, setBytes, setChar, setCharSequence, setDouble, setFloat, setIndex, setIntLE, setLongLE, setMediumLE, setShortLE, setZero, skipBytes, slice, slice, toString, toString, toString, trimIndicesToCapacity, writableBytes, writeBoolean, writeByte, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeChar, writeCharSequence, writeDouble, writeFloat, writeInt, writeIntLE, writeLong, writeLongLE, writeMedium, writeMediumLE, writerIndex, writerIndex, writeShort, writeShortLE, writeZero

从类继承的方法 io.netty.buffer.ByteBuf
asByteBuf, getDoubleLE, getFloatLE, maxFastWritableBytes, readDoubleLE, readFloatLE, setDoubleLE, setFloatLE, writeDoubleLE, writeFloatLE

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - UnpooledDirectByteBuf
```
public UnpooledDirectByteBuf(ByteBufAllocator alloc,
                             int initialCapacity,
                             int maxCapacity)
```
    Creates a new direct buffer.
    
    参数:
    
    initialCapacity - the initial capacity of the underlying direct buffer
    
    maxCapacity - the maximum capacity of the underlying direct buffer
  - UnpooledDirectByteBuf
```
protected UnpooledDirectByteBuf(ByteBufAllocator alloc,
                                java.nio.ByteBuffer initialBuffer,
                                int maxCapacity)
```
    Creates a new direct buffer by wrapping the specified initial buffer.
    
    参数:
    
    maxCapacity - the maximum capacity of the underlying direct buffer
- 方法详细资料
  - allocateDirect
```
protected java.nio.ByteBuffer allocateDirect(int initialCapacity)
```
    Allocate a new direct ByteBuffer with the given initialCapacity.
  - freeDirect
```
protected void freeDirect(java.nio.ByteBuffer buffer)
```
    Free a direct ByteBuffer
  - isDirect
```
public boolean isDirect()
```
    从类复制的说明: ByteBuf
    
    Returns true if and only if this buffer is backed by an NIO direct buffer.
    
    指定者:
    
    isDirect 在类中 ByteBuf
  - capacity
```
public int capacity()
```
    从类复制的说明: ByteBuf
    
    Returns the number of bytes (octets) this buffer can contain.
    
    指定者:
    
    capacity 在类中 ByteBuf
  - capacity
```
public ByteBuf capacity(int newCapacity)
```
    从类复制的说明: ByteBuf
    
    Adjusts the capacity of this buffer. If the newCapacity is less than the current capacity, the content of this buffer is truncated. If the newCapacity is greater than the current capacity, the buffer is appended with unspecified data whose length is (newCapacity - currentCapacity).
    
    指定者:
    
    capacity 在类中 ByteBuf
  - alloc
```
public ByteBufAllocator alloc()
```
    从类复制的说明: ByteBuf
    
    Returns the ByteBufAllocator which created this buffer.
    
    指定者:
    
    alloc 在类中 ByteBuf
  - order
```
public java.nio.ByteOrder order()
```
    从类复制的说明: ByteBuf
    
    Returns the endianness of this buffer.
    
    指定者:
    
    order 在类中 ByteBuf
  - hasArray
```
public boolean hasArray()
```
    从类复制的说明: ByteBuf
    
    Returns true if and only if this buffer has a backing byte array. If this method returns true, you can safely call ByteBuf.array() and ByteBuf.arrayOffset().
    
    指定者:
    
    hasArray 在类中 ByteBuf
  - array
```
public byte[] array()
```
    从类复制的说明: ByteBuf
    
    Returns the backing byte array of this buffer.
    
    指定者:
    
    array 在类中 ByteBuf
  - arrayOffset
```
public int arrayOffset()
```
    从类复制的说明: ByteBuf
    
    Returns the offset of the first byte within the backing byte array of this buffer.
    
    指定者:
    
    arrayOffset 在类中 ByteBuf
  - hasMemoryAddress
```
public boolean hasMemoryAddress()
```
    从类复制的说明: ByteBuf
    
    Returns true if and only if this buffer has a reference to the low-level memory address that points to the backing data.
    
    指定者:
    
    hasMemoryAddress 在类中 ByteBuf
  - memoryAddress
```
public long memoryAddress()
```
    从类复制的说明: ByteBuf
    
    Returns the low-level memory address that point to the first byte of ths backing data.
    
    指定者:
    
    memoryAddress 在类中 ByteBuf
  - getByte
```
public byte getByte(int index)
```
    从类复制的说明: ByteBuf
    
    Gets a byte at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    getByte 在类中 AbstractByteBuf
  - _getByte
```
protected byte _getByte(int index)
```
    指定者:
    
    _getByte 在类中 AbstractByteBuf
  - getShort
```
public short getShort(int index)
```
    从类复制的说明: ByteBuf
    
    Gets a 16-bit short integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    getShort 在类中 AbstractByteBuf
  - _getShort
```
protected short _getShort(int index)
```
    指定者:
    
    _getShort 在类中 AbstractByteBuf
  - _getShortLE
```
protected short _getShortLE(int index)
```
    指定者:
    
    _getShortLE 在类中 AbstractByteBuf
  - getUnsignedMedium
```
public int getUnsignedMedium(int index)
```
    从类复制的说明: ByteBuf
    
    Gets an unsigned 24-bit medium integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    getUnsignedMedium 在类中 AbstractByteBuf
  - _getUnsignedMedium
```
protected int _getUnsignedMedium(int index)
```
    指定者:
    
    _getUnsignedMedium 在类中 AbstractByteBuf
  - _getUnsignedMediumLE
```
protected int _getUnsignedMediumLE(int index)
```
    指定者:
    
    _getUnsignedMediumLE 在类中 AbstractByteBuf
  - getInt
```
public int getInt(int index)
```
    从类复制的说明: ByteBuf
    
    Gets a 32-bit integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    getInt 在类中 AbstractByteBuf
  - _getInt
```
protected int _getInt(int index)
```
    指定者:
    
    _getInt 在类中 AbstractByteBuf
  - _getIntLE
```
protected int _getIntLE(int index)
```
    指定者:
    
    _getIntLE 在类中 AbstractByteBuf
  - getLong
```
public long getLong(int index)
```
    从类复制的说明: ByteBuf
    
    Gets a 64-bit long integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    getLong 在类中 AbstractByteBuf
  - _getLong
```
protected long _getLong(int index)
```
    指定者:
    
    _getLong 在类中 AbstractByteBuf
  - _getLongLE
```
protected long _getLongLE(int index)
```
    指定者:
    
    _getLongLE 在类中 AbstractByteBuf
  - getBytes
```
public ByteBuf getBytes(int index,
                        ByteBuf dst,
                        int dstIndex,
                        int length)
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.
    
    指定者:
    
    getBytes 在类中 ByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public ByteBuf getBytes(int index,
                        byte[] dst,
                        int dstIndex,
                        int length)
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    getBytes 在类中 ByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - readBytes
```
public ByteBuf readBytes(byte[] dst,
                         int dstIndex,
                         int length)
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the current readerIndex and increases the readerIndex by the number of the transferred bytes (= length).
    
    覆盖:
    
    readBytes 在类中 AbstractByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public ByteBuf getBytes(int index,
                        java.nio.ByteBuffer dst)
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer while the destination's position will be increased.
    
    指定者:
    
    getBytes 在类中 ByteBuf
  - readBytes
```
public ByteBuf readBytes(java.nio.ByteBuffer dst)
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the current readerIndex until the destination's position reaches its limit, and increases the readerIndex by the number of the transferred bytes.
    
    覆盖:
    
    readBytes 在类中 AbstractByteBuf
  - setByte
```
public ByteBuf setByte(int index,
                       int value)
```
    从类复制的说明: ByteBuf
    
    Sets the specified byte at the specified absolute index in this buffer. The 24 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    setByte 在类中 AbstractByteBuf
  - _setByte
```
protected void _setByte(int index,
                        int value)
```
    指定者:
    
    _setByte 在类中 AbstractByteBuf
  - setShort
```
public ByteBuf setShort(int index,
                        int value)
```
    从类复制的说明: ByteBuf
    
    Sets the specified 16-bit short integer at the specified absolute index in this buffer. The 16 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    setShort 在类中 AbstractByteBuf
  - _setShort
```
protected void _setShort(int index,
                         int value)
```
    指定者:
    
    _setShort 在类中 AbstractByteBuf
  - _setShortLE
```
protected void _setShortLE(int index,
                           int value)
```
    指定者:
    
    _setShortLE 在类中 AbstractByteBuf
  - setMedium
```
public ByteBuf setMedium(int index,
                         int value)
```
    从类复制的说明: ByteBuf
    
    Sets the specified 24-bit medium integer at the specified absolute index in this buffer. Please note that the most significant byte is ignored in the specified value. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    setMedium 在类中 AbstractByteBuf
  - _setMedium
```
protected void _setMedium(int index,
                          int value)
```
    指定者:
    
    _setMedium 在类中 AbstractByteBuf
  - _setMediumLE
```
protected void _setMediumLE(int index,
                            int value)
```
    指定者:
    
    _setMediumLE 在类中 AbstractByteBuf
  - setInt
```
public ByteBuf setInt(int index,
                      int value)
```
    从类复制的说明: ByteBuf
    
    Sets the specified 32-bit integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    setInt 在类中 AbstractByteBuf
  - _setInt
```
protected void _setInt(int index,
                       int value)
```
    指定者:
    
    _setInt 在类中 AbstractByteBuf
  - _setIntLE
```
protected void _setIntLE(int index,
                         int value)
```
    指定者:
    
    _setIntLE 在类中 AbstractByteBuf
  - setLong
```
public ByteBuf setLong(int index,
                       long value)
```
    从类复制的说明: ByteBuf
    
    Sets the specified 64-bit long integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    覆盖:
    
    setLong 在类中 AbstractByteBuf
  - _setLong
```
protected void _setLong(int index,
                        long value)
```
    指定者:
    
    _setLong 在类中 AbstractByteBuf
  - _setLongLE
```
protected void _setLongLE(int index,
                          long value)
```
    指定者:
    
    _setLongLE 在类中 AbstractByteBuf
  - setBytes
```
public ByteBuf setBytes(int index,
                        ByteBuf src,
                        int srcIndex,
                        int length)
```
    从类复制的说明: ByteBuf
    
    Transfers the specified source buffer's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.
    
    指定者:
    
    setBytes 在类中 ByteBuf
    
    srcIndex - the first index of the source
    
    length - the number of bytes to transfer
  - setBytes
```
public ByteBuf setBytes(int index,
                        byte[] src,
                        int srcIndex,
                        int length)
```
    从类复制的说明: ByteBuf
    
    Transfers the specified source array's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    setBytes 在类中 ByteBuf
  - setBytes
```
public ByteBuf setBytes(int index,
                        java.nio.ByteBuffer src)
```
    从类复制的说明: ByteBuf
    
    Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    setBytes 在类中 ByteBuf
  - getBytes
```
public ByteBuf getBytes(int index,
                        java.io.OutputStream out,
                        int length)
                 throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified stream starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    getBytes 在类中 ByteBuf
    
    length - the number of bytes to transfer
    
    抛出:
    
    java.io.IOException - if the specified stream threw an exception during I/O
  - readBytes
```
public ByteBuf readBytes(java.io.OutputStream out,
                         int length)
                  throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified stream starting at the current readerIndex.
    
    覆盖:
    
    readBytes 在类中 AbstractByteBuf
    
    length - the number of bytes to transfer
    
    抛出:
    
    java.io.IOException - if the specified stream threw an exception during I/O
  - getBytes
```
public int getBytes(int index,
                    java.nio.channels.GatheringByteChannel out,
                    int length)
             throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified channel starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    getBytes 在类中 ByteBuf
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes written out to the specified channel
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - getBytes
```
public int getBytes(int index,
                    java.nio.channels.FileChannel out,
                    long position,
                    int length)
             throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data starting at the specified absolute index to the specified channel starting at the given file position. This method does not modify readerIndex or writerIndex of this buffer. This method does not modify the channel's position.
    
    指定者:
    
    getBytes 在类中 ByteBuf
    
    position - the file position at which the transfer is to begin
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes written out to the specified channel
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - readBytes
```
public int readBytes(java.nio.channels.GatheringByteChannel out,
                     int length)
              throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data to the specified stream starting at the current readerIndex.
    
    覆盖:
    
    readBytes 在类中 AbstractByteBuf
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes written out to the specified channel
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - readBytes
```
public int readBytes(java.nio.channels.FileChannel out,
                     long position,
                     int length)
              throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers this buffer's data starting at the current readerIndex to the specified channel starting at the given file position. This method does not modify the channel's position.
    
    覆盖:
    
    readBytes 在类中 AbstractByteBuf
    
    position - the file position at which the transfer is to begin
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes written out to the specified channel
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    java.io.InputStream in,
                    int length)
             throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers the content of the specified source stream to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    setBytes 在类中 ByteBuf
    
    length - the number of bytes to transfer
    
    返回:
    
    the actual number of bytes read in from the specified channel. -1 if the specified InputStream reached EOF.
    
    抛出:
    
    java.io.IOException - if the specified stream threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    java.nio.channels.ScatteringByteChannel in,
                    int length)
             throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers the content of the specified source channel to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    setBytes 在类中 ByteBuf
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes read in from the specified channel. -1 if the specified channel is closed or it reached EOF.
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    java.nio.channels.FileChannel in,
                    long position,
                    int length)
             throws java.io.IOException
```
    从类复制的说明: ByteBuf
    
    Transfers the content of the specified source channel starting at the given file position to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer. This method does not modify the channel's position.
    
    指定者:
    
    setBytes 在类中 ByteBuf
    
    position - the file position at which the transfer is to begin
    
    length - the maximum number of bytes to transfer
    
    返回:
    
    the actual number of bytes read in from the specified channel. -1 if the specified channel is closed or it reached EOF.
    
    抛出:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - nioBufferCount
```
public int nioBufferCount()
```
    从类复制的说明: ByteBuf
    
    Returns the maximum number of NIO ByteBuffers that consist this buffer. Note that ByteBuf.nioBuffers() or ByteBuf.nioBuffers(int, int) might return a less number of ByteBuffers.
    
    指定者:
    
    nioBufferCount 在类中 ByteBuf
    
    返回:
    
    -1 if this buffer has no underlying ByteBuffer. the number of the underlying ByteBuffers if this buffer has at least one underlying ByteBuffer. Note that this method does not return 0 to avoid confusion.
    
    另请参阅:
    
    ByteBuf.nioBuffer(), ByteBuf.nioBuffer(int, int), ByteBuf.nioBuffers(), ByteBuf.nioBuffers(int, int)
  - nioBuffers
```
public java.nio.ByteBuffer[] nioBuffers(int index,
                                        int length)
```
    从类复制的说明: ByteBuf
    
    Exposes this buffer's bytes as an NIO ByteBuffer's for the specified index and length The returned buffer either share or contains the copied content of this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer. This method does not modify readerIndex or writerIndex of this buffer. Please note that the returned NIO buffer will not see the changes of this buffer if this buffer is a dynamic buffer and it adjusted its capacity.
    
    指定者:
    
    nioBuffers 在类中 ByteBuf
    
    另请参阅:
    
    ByteBuf.nioBufferCount(), ByteBuf.nioBuffer(), ByteBuf.nioBuffer(int, int)
  - isContiguous
```
public final boolean isContiguous()
```
    从类复制的说明: ByteBuf
    
    Returns true if this ByteBuf implementation is backed by a single memory region. Composite buffer implementations must return false even if they currently hold ≤ 1 components. For buffers that return true, it's guaranteed that a successful call to ByteBuf.discardReadBytes() will increase the value of ByteBuf.maxFastWritableBytes() by the current readerIndex.
    This method will return false by default, and a false return value does not necessarily mean that the implementation is composite or that it is not backed by a single memory region.
    
    覆盖:
    
    isContiguous 在类中 ByteBuf
  - copy
```
public ByteBuf copy(int index,
                    int length)
```
    从类复制的说明: ByteBuf
    
    Returns a copy of this buffer's sub-region. Modifying the content of the returned buffer or this buffer does not affect each other at all. This method does not modify readerIndex or writerIndex of this buffer.
    
    指定者:
    
    copy 在类中 ByteBuf
  - internalNioBuffer
```
public java.nio.ByteBuffer internalNioBuffer(int index,
                                             int length)
```
    从类复制的说明: ByteBuf
    
    Internal use only: Exposes the internal NIO buffer.
    
    指定者:
    
    internalNioBuffer 在类中 ByteBuf
  - nioBuffer
```
public java.nio.ByteBuffer nioBuffer(int index,
                                     int length)
```
    从类复制的说明: ByteBuf
    
    Exposes this buffer's sub-region as an NIO ByteBuffer. The returned buffer either share or contains the copied content of this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer. This method does not modify readerIndex or writerIndex of this buffer. Please note that the returned NIO buffer will not see the changes of this buffer if this buffer is a dynamic buffer and it adjusted its capacity.
    
    指定者:
    
    nioBuffer 在类中 ByteBuf
    
    另请参阅:
    
    ByteBuf.nioBufferCount(), ByteBuf.nioBuffers(), ByteBuf.nioBuffers(int, int)
  - deallocate
```
protected void deallocate()
```
    从类复制的说明: AbstractReferenceCountedByteBuf
    
    Called once AbstractReferenceCountedByteBuf.refCnt() is equals 0.
    
    指定者:
    
    deallocate 在类中 AbstractReferenceCountedByteBuf
  - unwrap
```
public ByteBuf unwrap()
```
    从类复制的说明: ByteBuf
    
    Return the underlying buffer instance if this buffer is a wrapper of another buffer.
    
    指定者:
    
    unwrap 在类中 ByteBuf
    
    返回:
    
    null if this buffer is not a wrapper

类 UnpooledDirectByteBuf

构造器概要

方法概要

从类继承的方法 io.netty.buffer.AbstractReferenceCountedByteBuf

从类继承的方法 io.netty.buffer.AbstractByteBuf

从类继承的方法 io.netty.buffer.ByteBuf

从类继承的方法 java.lang.Object

构造器详细资料

UnpooledDirectByteBuf

UnpooledDirectByteBuf

方法详细资料

allocateDirect

freeDirect

isDirect

capacity

capacity

alloc

order

hasArray

array

arrayOffset

hasMemoryAddress

memoryAddress

getByte

_getByte

getShort

_getShort

_getShortLE

getUnsignedMedium

_getUnsignedMedium

_getUnsignedMediumLE

getInt

_getInt

_getIntLE

getLong

_getLong

_getLongLE

getBytes

getBytes

readBytes

getBytes

readBytes

setByte

_setByte

setShort

_setShort

_setShortLE

setMedium

_setMedium

_setMediumLE

setInt

_setInt

_setIntLE

setLong

_setLong

_setLongLE

setBytes

setBytes

setBytes

getBytes

readBytes

getBytes

getBytes

readBytes

readBytes

setBytes

setBytes

setBytes

nioBufferCount

nioBuffers

isContiguous

copy

internalNioBuffer

nioBuffer

deallocate

unwrap