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CharSeq.javaAPI DocExample1568Mon May 06 19:21:08 BST 2002com.ronsoft.books.nio.regex

CharSeq

public class CharSeq extends Object
Demonstrate behavior of java.lang.CharSequence as implemented by String, StringBuffer and CharBuffer. Created: April, 2002
author
Ron Hitchens (ron@ronsoft.com)
version
$Id: CharSeq.java,v 1.1 2002/05/07 02:21:08 ron Exp $

Fields Summary
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] argv)

		StringBuffer stringBuffer = new StringBuffer ("Hello World");
		CharBuffer charBuffer = CharBuffer.allocate (20);
		CharSequence charSequence = "Hello World";

		// derived directly from a String
		printCharSequence (charSequence);

		// derived from a StringBuffer
		charSequence = stringBuffer;
		printCharSequence (charSequence);

		// change StringBuffer
		stringBuffer.setLength (0);
		stringBuffer.append ("Goodbye cruel world");
		// same "immutable" CharSequence yields different result
		printCharSequence (charSequence);

		// derive CharSequence from CharBuffer.
		charSequence = charBuffer;
		charBuffer.put ("xxxxxxxxxxxxxxxxxxxx");
		charBuffer.clear();

		charBuffer.put ("Hello World");
		charBuffer.flip();
		printCharSequence (charSequence);

		charBuffer.mark();
		charBuffer.put ("Seeya");
		charBuffer.reset();
		printCharSequence (charSequence);

		charBuffer.clear();
		printCharSequence (charSequence);
		// changing underlying CharBuffer is reflected in the
		// read-only CharSequnce interface.
private static voidprintCharSequence(java.lang.CharSequence cs)

		System.out.println ("length=" + cs.length()
			+ ", content='" + cs.toString() + "'");