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The Java Developers Almanac 1.4Order this book from Amazon. |
e159. Getting Bytes from a ByteBufferAByteBuffer has a capacity that determines how many bytes it
contains. This capacity can never change. Any byte in the buffer can
be retrieved using the absolute version of get() , which takes an index
in the range [0..capacity-1].
The bytes in a // Create an empty ByteBuffer with a 10 byte capacity ByteBuffer bbuf = ByteBuffer.allocate(10); // Get the ByteBuffer's capacity int capacity = bbuf.capacity(); // 10 // Use the absolute get(). // This method does not affect the position. byte b = bbuf.get(5); // position=0 // Set the position bbuf.position(5); // Use the relative get() b = bbuf.get(); // Get the new position int pos = bbuf.position(); // 6 // Get remaining byte count int rem = bbuf.remaining(); // 4 // Set the limit bbuf.limit(7); // remaining=1 // This convenience method sets the position to 0 bbuf.rewind(); // remaining=7
e160. Putting Bytes into a ByteBuffer e161. Converting Between a ByteBuffer an a Byte Array e162. Getting and Setting Non-Byte Java Types in a ByteBuffer e163. Creating a Non-Byte Java Type Buffer on a ByteBuffer e164. Using a ByteBuffer to Store Strings e165. Setting the Byte Ordering for a ByteBuffer
© 2002 Addison-Wesley. |