java.lang.Object
- org.eclipse.jetty.util.BufferUtil

```
@Deprecated(since="2021-05-27")
public class BufferUtil
extends java.lang.Object
```
Deprecated.
The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
Buffer utility methods.
The standard JVM ByteBuffer can exist in two modes: In fill mode the valid data is between 0 and pos; In flush mode the valid data is between the pos and the limit. The various ByteBuffer methods assume a mode and some of them will switch or enforce a mode: Allocate and clear set fill mode; flip and compact switch modes; read and write assume fill and flush modes. This duality can result in confusing code such as:
```
      buffer.clear();
      channel.write(buffer);
  
```
Which looks as if it should write no data, but in fact writes the buffer worth of garbage.

The BufferUtil class provides a set of utilities that operate on the convention that ByteBuffers will always be left, passed in an API or returned from a method in the flush mode - ie with valid data between the pos and limit. This convention is adopted so as to avoid confusion as to what state a buffer is in and to avoid excessive copying of data that can result with the usage of compress.

Thus this class provides alternate implementations of allocate(int), allocateDirect(int) and clear(ByteBuffer) that leave the buffer in flush mode. Thus the following tests will pass:
```
      ByteBuffer buffer = BufferUtil.allocate(1024);
      assert(buffer.remaining()==0);
      BufferUtil.clear(buffer);
      assert(buffer.remaining()==0);
  
```
If the BufferUtil methods fill(ByteBuffer, byte[], int, int), append(ByteBuffer, byte[], int, int) or put(ByteBuffer, ByteBuffer) are used, then the caller does not need to explicitly switch the buffer to fill mode. If the caller wishes to use other ByteBuffer bases libraries to fill a buffer, then they can use explicit calls of #flipToFill(ByteBuffer) and #flipToFlush(ByteBuffer, int) to change modes. Note because this convention attempts to avoid the copies of compact, the position is not set to zero on each fill cycle and so its value must be remembered:
```
       int pos = BufferUtil.flipToFill(buffer);
       try
       {
           buffer.put(data);
       }
       finally
       {
           flipToFlush(buffer, pos);
       }
  
```
The flipToFill method will effectively clear the buffer if it is empty and will compact the buffer if there is no space.

Field Summary

Fields
Modifier and Type Field Description

static java.nio.ByteBuffer EMPTY_BUFFER
Deprecated.

Constructor Summary

Constructors
Constructor Description

BufferUtil()
Deprecated.

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static java.nio.ByteBuffer`	`allocate(int capacity)`	Deprecated. Allocate ByteBuffer in flush mode.
`static java.nio.ByteBuffer`	`allocateDirect(int capacity)`	Deprecated. Allocate ByteBuffer in flush mode.
`static void`	`append(java.nio.ByteBuffer to, byte b)`	Deprecated. Appends a byte to a buffer
`static void`	`append(java.nio.ByteBuffer to, byte[] b, int off, int len)`	Deprecated. Append bytes to a buffer.
`static int`	`append(java.nio.ByteBuffer to, java.nio.ByteBuffer b)`	Deprecated. Appends a buffer to a buffer
`static void`	`clear(java.nio.ByteBuffer buffer)`	Deprecated. Clears the buffer to be empty in flush mode.
`static void`	`clearToFill(java.nio.ByteBuffer buffer)`	Deprecated. Clear the buffer to be empty in fill mode.
`static boolean`	`compact(java.nio.ByteBuffer buffer)`	Deprecated. Compact the buffer
`static java.nio.ByteBuffer`	`copy(java.nio.ByteBuffer buffer)`	Deprecated. Deep copy of a buffer
`static java.nio.ByteBuffer`	`ensureCapacity(java.nio.ByteBuffer buffer, int capacity)`	Deprecated.
`static int`	`fill(java.nio.ByteBuffer to, byte[] b, int off, int len)`	Deprecated. Like append, but does not throw `BufferOverflowException`
`static int`	`flipPutFlip(java.nio.ByteBuffer from, java.nio.ByteBuffer to)`	Deprecated. use `append(ByteBuffer, ByteBuffer)`
`static int`	`flipToFill(java.nio.ByteBuffer buffer)`	Deprecated. Flip the buffer to fill mode.
`static void`	`flipToFlush(java.nio.ByteBuffer buffer, int position)`	Deprecated. Flip the buffer to Flush mode.
`static boolean`	`hasContent(java.nio.ByteBuffer buf)`	Deprecated. Check for a non null and non empty buffer.
`static boolean`	`isEmpty(java.nio.ByteBuffer buf)`	Deprecated. Check for an empty or null buffer.
`static boolean`	`isEmpty(java.nio.ByteBuffer[] buf)`	Deprecated. Check for an empty or null buffers.
`static boolean`	`isFull(java.nio.ByteBuffer buf)`	Deprecated. Check for a non null and full buffer.
`static boolean`	`isMappedBuffer(java.nio.ByteBuffer buffer)`	Deprecated. don't use - there is no way to reliably tell if a ByteBuffer is mapped.
`static boolean`	`isPrefix(java.nio.ByteBuffer prefix, java.nio.ByteBuffer buffer)`	Deprecated.
`static boolean`	`isTheEmptyBuffer(java.nio.ByteBuffer buf)`	Deprecated.
`static int`	`length(java.nio.ByteBuffer buffer)`	Deprecated. Get remaining from null checked buffer
`static int`	`put(java.nio.ByteBuffer from, java.nio.ByteBuffer to)`	Deprecated. Put data from one buffer into another, avoiding over/under flows
`static void`	`putCRLF(java.nio.ByteBuffer buffer)`	Deprecated.
`static void`	`putDecInt(java.nio.ByteBuffer buffer, int n)`	Deprecated.
`static void`	`putDecLong(java.nio.ByteBuffer buffer, long n)`	Deprecated.
`static void`	`putHexInt(java.nio.ByteBuffer buffer, int n)`	Deprecated.
`static void`	`putIntLittleEndian(java.nio.ByteBuffer buffer, int value)`	Deprecated. Put an integer little endian
`static void`	`readFrom(java.io.File file, java.nio.ByteBuffer buffer)`	Deprecated.
`static void`	`readFrom(java.io.InputStream is, int needed, java.nio.ByteBuffer buffer)`	Deprecated.
`static long`	`remaining(java.nio.ByteBuffer... buf)`	Deprecated. Get the remaining bytes in 0 or more buffers.
`static void`	`reset(java.nio.ByteBuffer buffer)`	Deprecated. Resets the buffer's endianness to `ByteOrder.BIG_ENDIAN` and clears the buffer to be empty in flush mode.
`static int`	`space(java.nio.ByteBuffer buffer)`	Deprecated. Get the space from the limit to the capacity
`static int`	`takeInt(java.nio.ByteBuffer buffer)`	Deprecated. Convert buffer to an integer.
`static byte[]`	`toArray(java.nio.ByteBuffer buffer)`	Deprecated. Convert a ByteBuffer to a byte array.
`static java.nio.ByteBuffer`	`toBuffer(byte[] array)`	Deprecated. Create a new ByteBuffer using provided byte array.
`static java.nio.ByteBuffer`	`toBuffer(byte[] array, int offset, int length)`	Deprecated. Create a new ByteBuffer using the provided byte array.
`static java.nio.ByteBuffer`	`toBuffer(int value)`	Deprecated.
`static java.nio.ByteBuffer`	`toBuffer(long value)`	Deprecated.
`static java.nio.ByteBuffer`	`toBuffer(java.lang.String s)`	Deprecated.
`static java.nio.ByteBuffer`	`toBuffer(java.lang.String s, java.nio.charset.Charset charset)`	Deprecated.
`static java.nio.ByteBuffer`	`toBuffer(Resource resource, boolean direct)`	Deprecated.
`static java.lang.String`	`toDetailString(java.nio.ByteBuffer buffer)`	Deprecated. Convert Buffer to a detail debug string of pointers and content
`static java.lang.String`	`toDetailString(java.nio.ByteBuffer[] buffer)`	Deprecated.
`static java.nio.ByteBuffer`	`toDirectBuffer(java.lang.String s)`	Deprecated.
`static java.nio.ByteBuffer`	`toDirectBuffer(java.lang.String s, java.nio.charset.Charset charset)`	Deprecated.
`static java.lang.String`	`toHexString(java.nio.ByteBuffer buffer)`	Deprecated. Convert buffer to a Hex String.
`static java.lang.String`	`toHexSummary(java.nio.ByteBuffer buffer)`	Deprecated. Convert buffer to a Hex Summary String.
`static java.lang.String`	`toIDString(java.nio.ByteBuffer buffer)`	Deprecated. Convert Buffer to string ID independent of content
`static int`	`toInt(java.nio.ByteBuffer buffer)`	Deprecated. Convert buffer to an integer.
`static int`	`toInt(java.nio.ByteBuffer buffer, int position, int length)`	Deprecated. Convert buffer to an integer.
`static long`	`toLong(java.nio.ByteBuffer buffer)`	Deprecated. Convert buffer to an long.
`static java.nio.ByteBuffer`	`toMappedBuffer(java.io.File file)`	Deprecated.
`static java.nio.ByteBuffer`	`toMappedBuffer(java.nio.file.Path filePath, long pos, long len)`	Deprecated.
`static java.lang.String`	`toString(java.nio.ByteBuffer buffer)`	Deprecated. Convert the buffer to an ISO-8859-1 String
`static java.lang.String`	`toString(java.nio.ByteBuffer buffer, int position, int length, java.nio.charset.Charset charset)`	Deprecated. Convert a partial buffer to a String.
`static java.lang.String`	`toString(java.nio.ByteBuffer buffer, java.nio.charset.Charset charset)`	Deprecated. Convert the buffer to an ISO-8859-1 String
`static java.lang.String`	`toSummaryString(java.nio.ByteBuffer buffer)`	Deprecated.
`static java.lang.String`	`toUTF8String(java.nio.ByteBuffer buffer)`	Deprecated. Convert the buffer to an UTF-8 String
`static void`	`writeTo(java.nio.ByteBuffer buffer, java.io.OutputStream out)`	Deprecated.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - EMPTY_BUFFER
```
public static final java.nio.ByteBuffer EMPTY_BUFFER
```
    Deprecated.
- Constructor Detail
  - BufferUtil
```
public BufferUtil()
```
    Deprecated.
- Method Detail
  - allocate
```
public static java.nio.ByteBuffer allocate(int capacity)
```
    Deprecated.
    
    Allocate ByteBuffer in flush mode. The position and limit will both be zero, indicating that the buffer is empty and must be flipped before any data is put to it.
    
    Parameters:
    
    capacity - capacity of the allocated ByteBuffer
    
    Returns:
    
    Buffer
  - allocateDirect
```
public static java.nio.ByteBuffer allocateDirect(int capacity)
```
    Deprecated.
    
    Allocate ByteBuffer in flush mode. The position and limit will both be zero, indicating that the buffer is empty and in flush mode.
    
    Parameters:
    
    capacity - capacity of the allocated ByteBuffer
    
    Returns:
    
    Buffer
  - copy
```
public static java.nio.ByteBuffer copy(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Deep copy of a buffer
    
    Parameters:
    
    buffer - The buffer to copy
    
    Returns:
    
    A copy of the buffer
  - reset
```
public static void reset(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Resets the buffer's endianness to ByteOrder.BIG_ENDIAN and clears the buffer to be empty in flush mode. The position and limit are set to 0.
    
    Parameters:
    
    buffer - the buffer to reset.
  - clear
```
public static void clear(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Clears the buffer to be empty in flush mode. The position and limit are set to 0.
    
    Parameters:
    
    buffer - the buffer to clear.
  - clearToFill
```
public static void clearToFill(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Clear the buffer to be empty in fill mode. The position is set to 0 and the limit is set to the capacity.
    
    Parameters:
    
    buffer - The buffer to clear.
  - flipToFill
```
public static int flipToFill(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Flip the buffer to fill mode. The position is set to the first unused position in the buffer (the old limit) and the limit is set to the capacity. If the buffer is empty, then this call is effectively clearToFill(ByteBuffer). If there is no unused space to fill, a ByteBuffer.compact() is done to attempt to create space.
    This method is used as a replacement to ByteBuffer.compact().
    
    Parameters:
    
    buffer - The buffer to flip
    
    Returns:
    
    The position of the valid data before the flipped position. This value should be passed to a subsequent call to flipToFlush(ByteBuffer, int)
  - flipToFlush
```
public static void flipToFlush(java.nio.ByteBuffer buffer,
                               int position)
```
    Deprecated.
    
    Flip the buffer to Flush mode. The limit is set to the first unused byte(the old position) and the position is set to the passed position.
    This method is used as a replacement of Buffer.flip().
    
    Parameters:
    
    buffer - the buffer to be flipped
    
    position - The position of valid data to flip to. This should be the return value of the previous call to flipToFill(ByteBuffer)
  - putIntLittleEndian
```
public static void putIntLittleEndian(java.nio.ByteBuffer buffer,
                                      int value)
```
    Deprecated.
    
    Put an integer little endian
    
    Parameters:
    
    buffer - The buffer to put to
    
    value - The value to put.
  - toArray
```
public static byte[] toArray(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert a ByteBuffer to a byte array.
    
    Parameters:
    
    buffer - The buffer to convert in flush mode. The buffer is not altered.
    
    Returns:
    
    An array of bytes duplicated from the buffer.
  - isTheEmptyBuffer
```
public static boolean isTheEmptyBuffer(java.nio.ByteBuffer buf)
```
    Deprecated.
    
    Parameters:
    
    buf - the buffer to check
    
    Returns:
    
    true if buf is equal to EMPTY_BUFFER
  - isEmpty
```
public static boolean isEmpty(java.nio.ByteBuffer buf)
```
    Deprecated.
    
    Check for an empty or null buffer.
    
    Parameters:
    
    buf - the buffer to check
    
    Returns:
    
    true if the buffer is null or empty.
  - isEmpty
```
public static boolean isEmpty(java.nio.ByteBuffer[] buf)
```
    Deprecated.
    
    Check for an empty or null buffers.
    
    Parameters:
    
    buf - the buffer to check
    
    Returns:
    
    true if the buffer is null or empty.
  - remaining
```
public static long remaining(java.nio.ByteBuffer... buf)
```
    Deprecated.
    
    Get the remaining bytes in 0 or more buffers.
    
    Parameters:
    
    buf - the buffers to check
    
    Returns:
    
    number of bytes remaining in all buffers.
  - hasContent
```
public static boolean hasContent(java.nio.ByteBuffer buf)
```
    Deprecated.
    
    Check for a non null and non empty buffer.
    
    Parameters:
    
    buf - the buffer to check
    
    Returns:
    
    true if the buffer is not null and not empty.
  - isFull
```
public static boolean isFull(java.nio.ByteBuffer buf)
```
    Deprecated.
    
    Check for a non null and full buffer.
    
    Parameters:
    
    buf - the buffer to check
    
    Returns:
    
    true if the buffer is not null and the limit equals the capacity.
  - length
```
public static int length(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Get remaining from null checked buffer
    
    Parameters:
    
    buffer - The buffer to get the remaining from, in flush mode.
    
    Returns:
    
    0 if the buffer is null, else the bytes remaining in the buffer.
  - space
```
public static int space(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Get the space from the limit to the capacity
    
    Parameters:
    
    buffer - the buffer to get the space from
    
    Returns:
    
    space
  - compact
```
public static boolean compact(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Compact the buffer
    
    Parameters:
    
    buffer - the buffer to compact
    
    Returns:
    
    true if the compact made a full buffer have space
  - put
```
public static int put(java.nio.ByteBuffer from,
                      java.nio.ByteBuffer to)
```
    Deprecated.
    
    Put data from one buffer into another, avoiding over/under flows
    
    Parameters:
    
    from - Buffer to take bytes from in flush mode
    
    to - Buffer to put bytes to in fill mode.
    
    Returns:
    
    number of bytes moved
  - flipPutFlip
```
public static int flipPutFlip(java.nio.ByteBuffer from,
                              java.nio.ByteBuffer to)
```
    Deprecated.
    use append(ByteBuffer, ByteBuffer)
    
    Put data from one buffer into another, avoiding over/under flows
    
    Parameters:
    
    from - Buffer to take bytes from in flush mode
    
    to - Buffer to put bytes to in flush mode. The buffer is flipToFill before the put and flipToFlush after.
    
    Returns:
    
    number of bytes moved
  - append
```
public static void append(java.nio.ByteBuffer to,
                          byte[] b,
                          int off,
                          int len)
                   throws java.nio.BufferOverflowException
```
    Deprecated.
    
    Append bytes to a buffer.
    
    Parameters:
    
    to - Buffer is flush mode
    
    b - bytes to append
    
    off - offset into byte
    
    len - length to append
    
    Throws:
    
    java.nio.BufferOverflowException - if unable to append buffer due to space limits
  - append
```
public static void append(java.nio.ByteBuffer to,
                          byte b)
```
    Deprecated.
    
    Appends a byte to a buffer
    
    Parameters:
    
    to - Buffer is flush mode
    
    b - byte to append
    
    Throws:
    
    java.nio.BufferOverflowException - if unable to append buffer due to space limits
  - append
```
public static int append(java.nio.ByteBuffer to,
                         java.nio.ByteBuffer b)
```
    Deprecated.
    
    Appends a buffer to a buffer
    
    Parameters:
    
    to - Buffer is flush mode
    
    b - buffer to append
    
    Returns:
    
    The position of the valid data before the flipped position.
  - fill
```
public static int fill(java.nio.ByteBuffer to,
                       byte[] b,
                       int off,
                       int len)
```
    Deprecated.
    
    Like append, but does not throw BufferOverflowException
    
    Parameters:
    
    to - Buffer The buffer to fill to. The buffer will be flipped to fill mode and then flipped back to flush mode.
    
    b - bytes The bytes to fill
    
    off - offset into bytes
    
    len - length to fill
    
    Returns:
    
    the number of bytes taken from the buffer.
  - readFrom
```
public static void readFrom(java.io.File file,
                            java.nio.ByteBuffer buffer)
                     throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - readFrom
```
public static void readFrom(java.io.InputStream is,
                            int needed,
                            java.nio.ByteBuffer buffer)
                     throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - writeTo
```
public static void writeTo(java.nio.ByteBuffer buffer,
                           java.io.OutputStream out)
                    throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - toString
```
public static java.lang.String toString(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert the buffer to an ISO-8859-1 String
    
    Parameters:
    
    buffer - The buffer to convert in flush mode. The buffer is unchanged
    
    Returns:
    
    The buffer as a string.
  - toUTF8String
```
public static java.lang.String toUTF8String(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert the buffer to an UTF-8 String
    
    Parameters:
    
    buffer - The buffer to convert in flush mode. The buffer is unchanged
    
    Returns:
    
    The buffer as a string.
  - toString
```
public static java.lang.String toString(java.nio.ByteBuffer buffer,
                                        java.nio.charset.Charset charset)
```
    Deprecated.
    
    Convert the buffer to an ISO-8859-1 String
    
    Parameters:
    
    buffer - The buffer to convert in flush mode. The buffer is unchanged
    
    charset - The Charset to use to convert the bytes
    
    Returns:
    
    The buffer as a string.
  - toString
```
public static java.lang.String toString(java.nio.ByteBuffer buffer,
                                        int position,
                                        int length,
                                        java.nio.charset.Charset charset)
```
    Deprecated.
    
    Convert a partial buffer to a String.
    
    Parameters:
    
    buffer - the buffer to convert
    
    position - The position in the buffer to start the string from
    
    length - The length of the buffer
    
    charset - The Charset to use to convert the bytes
    
    Returns:
    
    The buffer as a string.
  - toInt
```
public static int toInt(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert buffer to an integer. Parses up to the first non-numeric character. If no number is found an IllegalArgumentException is thrown
    
    Parameters:
    
    buffer - A buffer containing an integer in flush mode. The position is not changed.
    
    Returns:
    
    an int
  - toInt
```
public static int toInt(java.nio.ByteBuffer buffer,
                        int position,
                        int length)
```
    Deprecated.
    
    Convert buffer to an integer. Parses up to the first non-numeric character. If no number is found an IllegalArgumentException is thrown
    
    Parameters:
    
    buffer - A buffer containing an integer in flush mode. The position is not changed.
    
    position - the position in the buffer to start reading from
    
    length - the length of the buffer to use for conversion
    
    Returns:
    
    an int of the buffer bytes
  - takeInt
```
public static int takeInt(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert buffer to an integer. Parses up to the first non-numeric character. If no number is found an IllegalArgumentException is thrown
    
    Parameters:
    
    buffer - A buffer containing an integer in flush mode. The position is updated.
    
    Returns:
    
    an int
  - toLong
```
public static long toLong(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert buffer to an long. Parses up to the first non-numeric character. If no number is found an IllegalArgumentException is thrown
    
    Parameters:
    
    buffer - A buffer containing an integer in flush mode. The position is not changed.
    
    Returns:
    
    an int
  - putHexInt
```
public static void putHexInt(java.nio.ByteBuffer buffer,
                             int n)
```
    Deprecated.
  - putDecInt
```
public static void putDecInt(java.nio.ByteBuffer buffer,
                             int n)
```
    Deprecated.
  - putDecLong
```
public static void putDecLong(java.nio.ByteBuffer buffer,
                              long n)
```
    Deprecated.
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(int value)
```
    Deprecated.
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(long value)
```
    Deprecated.
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(java.lang.String s)
```
    Deprecated.
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(java.lang.String s,
                                           java.nio.charset.Charset charset)
```
    Deprecated.
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(byte[] array)
```
    Deprecated.
    
    Create a new ByteBuffer using provided byte array.
    
    Parameters:
    
    array - the byte array to back buffer with.
    
    Returns:
    
    ByteBuffer with provided byte array, in flush mode
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(byte[] array,
                                           int offset,
                                           int length)
```
    Deprecated.
    
    Create a new ByteBuffer using the provided byte array.
    
    Parameters:
    
    array - the byte array to use.
    
    offset - the offset within the byte array to use from
    
    length - the length in bytes of the array to use
    
    Returns:
    
    ByteBuffer with provided byte array, in flush mode
  - toDirectBuffer
```
public static java.nio.ByteBuffer toDirectBuffer(java.lang.String s)
```
    Deprecated.
  - toDirectBuffer
```
public static java.nio.ByteBuffer toDirectBuffer(java.lang.String s,
                                                 java.nio.charset.Charset charset)
```
    Deprecated.
  - toMappedBuffer
```
public static java.nio.ByteBuffer toMappedBuffer(java.io.File file)
                                          throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - toMappedBuffer
```
public static java.nio.ByteBuffer toMappedBuffer(java.nio.file.Path filePath,
                                                 long pos,
                                                 long len)
                                          throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - isMappedBuffer
```
@Deprecated
public static boolean isMappedBuffer(java.nio.ByteBuffer buffer)
```
    Deprecated.
    don't use - there is no way to reliably tell if a ByteBuffer is mapped.
    
    Parameters:
    
    buffer - the buffer to test
    
    Returns:
    
    false
  - toBuffer
```
public static java.nio.ByteBuffer toBuffer(Resource resource,
                                           boolean direct)
                                    throws java.io.IOException
```
    Deprecated.
    
    Throws:
    
    java.io.IOException
  - toSummaryString
```
public static java.lang.String toSummaryString(java.nio.ByteBuffer buffer)
```
    Deprecated.
  - toDetailString
```
public static java.lang.String toDetailString(java.nio.ByteBuffer[] buffer)
```
    Deprecated.
  - toIDString
```
public static java.lang.String toIDString(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert Buffer to string ID independent of content
    
    Parameters:
    
    buffer - the buffet to generate a string ID from
    
    Returns:
    
    A string showing the buffer ID
  - toDetailString
```
public static java.lang.String toDetailString(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert Buffer to a detail debug string of pointers and content
    
    Parameters:
    
    buffer - the buffer to generate a detail string from
    
    Returns:
    
    A string showing the pointers and content of the buffer
  - toHexSummary
```
public static java.lang.String toHexSummary(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert buffer to a Hex Summary String.
    
    Parameters:
    
    buffer - the buffer to generate a hex byte summary from
    
    Returns:
    
    A string showing a summary of the content in hex
  - toHexString
```
public static java.lang.String toHexString(java.nio.ByteBuffer buffer)
```
    Deprecated.
    
    Convert buffer to a Hex String.
    
    Parameters:
    
    buffer - the buffer to generate a hex byte summary from
    
    Returns:
    
    A hex string
  - putCRLF
```
public static void putCRLF(java.nio.ByteBuffer buffer)
```
    Deprecated.
  - isPrefix
```
public static boolean isPrefix(java.nio.ByteBuffer prefix,
                               java.nio.ByteBuffer buffer)
```
    Deprecated.
  - ensureCapacity
```
public static java.nio.ByteBuffer ensureCapacity(java.nio.ByteBuffer buffer,
                                                 int capacity)
```
    Deprecated.

Class BufferUtil

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

EMPTY_BUFFER

Constructor Detail

BufferUtil

Method Detail

allocate

allocateDirect

copy

reset

clear

clearToFill

flipToFill

flipToFlush

putIntLittleEndian

toArray

isTheEmptyBuffer

isEmpty

isEmpty

remaining

hasContent

isFull

length

space

compact

put

flipPutFlip

append

append

append

fill

readFrom

readFrom

writeTo

toString

toUTF8String

toString

toString

toInt

toInt

takeInt

toLong

putHexInt

putDecInt

putDecLong

toBuffer

toBuffer

toBuffer

toBuffer

toBuffer

toBuffer

toDirectBuffer

toDirectBuffer

toMappedBuffer

toMappedBuffer

isMappedBuffer

toBuffer

toSummaryString

toDetailString

toIDString

toDetailString

toHexSummary

toHexString

putCRLF

isPrefix

ensureCapacity