ScanStreamTok - show scanning a file with StringTokenizer
/*
* 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 $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* 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.
*/
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StreamTokenizer;
/**
* ScanStreamTok - show scanning a file with StringTokenizer.
*
* @author Ian Darwin, http://www.darwinsys.com/
* @version $Id: ScanStreamTok.java,v 1.6 2004/02/17 00:17:54 ian Exp $
*/
public class ScanStreamTok {
protected StreamTokenizer tf;
public static void main(String[] av) throws IOException {
if (av.length == 0)
new ScanStreamTok(
new InputStreamReader(System.in)).process();
else
for (int i=0; i<av.length; i++)
new ScanStreamTok(av[i]).process();
}
/** Construct a file scanner by name */
public ScanStreamTok(String fileName) throws IOException {
tf = new StreamTokenizer(new FileReader(fileName));
}
/** Construct a file scanner by existing Reader */
public ScanStreamTok(Reader rdr) throws IOException {
tf = new StreamTokenizer(rdr);
}
protected void process() throws IOException {
String s = null;
int i;
while ((i = tf.nextToken()) != StreamTokenizer.TT_EOF) {
switch(i) {
case StreamTokenizer.TT_EOF:
System.out.println("End of file");
break;
case StreamTokenizer.TT_EOL:
System.out.println("End of line");
break;
case StreamTokenizer.TT_NUMBER:
System.out.println("Number " + tf.nval);
break;
case StreamTokenizer.TT_WORD:
System.out.println("Word, length " + tf.sval.length() + "->" + tf.sval);
break;
default:
System.out.println("What is it? i = " + i);
}
}
}
}
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