What is a ByteBuffer in Java?
What is a ByteBuffer in Java?
A ByteBuffer is a buffer which provides for transferring bytes from a source to a destination. In addition to storage like a buffer array, it also provides abstractions such as current position, limit, capacity, etc. A FileChannel is used for transferring data to and from a file to a ByteBuffer.
How do you create ByteBuffer in Java?
A ByteBuffer is created via the the two static factory methods:
- allocate(int) this will allocate a HeapByteBuffer with the capacity specified by the int argument.
- allocateDirect(int) this will allocate a DirectByteBuffer with the capacity specified by the int argument.
What is ByteBuffer in Java?
What is a byte buffer in Java?
A byte buffer. This class defines six categories of operations upon byte buffers: Absolute and relative getand putmethods that read and write single bytes; Absolute and relative bulk getmethods that transfer contiguous sequences of bytes from this buffer into an array;
How can i Compact a byte buffer?
A method for compactinga byte buffer. Byte buffers can be created either by allocation, which allocates space for the buffer’s content, or by wrappingan existing byte array into a buffer. Direct vs.non-direct buffers
What is the byte order of a VIEW buffer?
The byte order of a view buffer is fixed to be that of its byte buffer at the time that the view is created. Invocation chaining Methods in this class that do not otherwise have a value to return are specified to return the buffer upon which they are invoked. This allows method invocations to be chained.
How does the Java virtual machine handle a direct byte buffer?
Given a direct byte buffer, the Java virtual machine will make a best effort to perform native I/O operations directly upon it. That is, it will attempt to avoid copying the buffer’s content to (or from) an intermediate buffer before (or after) each invocation of one of the underlying operating system’s native I/O operations.
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