StringBufferDemo: construct the same String three different ways
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
/**
* StringBufferDemo: construct the same String three different ways.
*/
public class StringBufferDemo {
public static void main(String[] argv) {
String s1 = "Hello" + ", " + "World";
System.out.println(s1);
// Build a StringBuffer, and append some things to it.
StringBuffer sb2 = new StringBuffer();
sb2.append("Hello");
sb2.append(',');
sb2.append(' ');
sb2.append("World");
// Get the StringBuffer's value as a String, and print it.
String s2 = sb2.toString();
System.out.println(s2);
// Now do the above all over again, but in a more
// concise (and typical "real-world" Java) fashion.
StringBuffer sb3 = new StringBuffer().append("Hello").
append(',').append(' ').append("World");
System.out.println(sb3.toString());
// Exercise for the reader: do it all AGAIN but without
// creating any temporary variables.
}
}
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