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The Java Developers Almanac 1.4Order this book from Amazon. |
e164. Using a ByteBuffer to Store StringsThis example demonstrates how to use aByteBuffer to store
characters. For example, an application may want to store strings in
a file to avoid the conversion to and from bytes. The example creates
a character view on the ByteBuffer that provides methods for
reading and writing strings.
This example does not convert characters and bytes. For an example on how to convert characters to and from bytes, see e186 Converting Between Strings (Unicode) and Other Character Set Encodings. // Obtain a ByteBuffer; see also e158 Creating a ByteBuffer ByteBuffer buf = ByteBuffer.allocate(100); // Create a character ByteBuffer CharBuffer cbuf = buf.asCharBuffer(); // Write a string cbuf.put("a string"); // Convert character ByteBuffer to a string. // Uses characters between current position and limit so flip it first cbuf.flip(); String s = cbuf.toString(); // a string // Does not affect position // Get a substring int start = 2; // start is relative to cbuf's current position int end = 5; CharSequence sub = cbuf.subSequence(start, end); // str
e159. Getting Bytes from a ByteBuffer 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 e165. Setting the Byte Ordering for a ByteBuffer
© 2002 Addison-Wesley. |