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Java Cookbook
book

Java Cookbook

by Ian F. Darwin
June 2001
Intermediate to advanced content levelIntermediate to advanced
888 pages
21h 1m
English
O'Reilly Media, Inc.
Content preview from Java Cookbook

Program: Find

This program implements a small subset of the MS-Windows Find Filesdialog or the Unix find command. However, it has much of the structure needed to build a more complete version of either of these. It uses a custom filename filter controlled by the -n command-line option, which is parsed using my GetOpt (see Section 2.8).

import com.darwinsys.util.*; import java.io.*; import java.io.*; /** * Find - find files by name, size, or other criteria. Non-GUI version. */ public class Find { /** Main program */ public static void main(String[] args) { Find finder = new Find( ); GetOpt argHandler = new GetOpt("n:s:"); int c; while ((c = argHandler.getopt(args)) != GetOpt.DONE) { switch(c) { case 'n': finder.filter.setNameFilter(argHandler.optarg( )); break; case 's': finder.filter.setSizeFilter(argHandler.optarg( )); break; default: System.out.println("Got: " + c); usage( ); } } if (args.length == 0 || argHandler.getOptInd( )-1 == args.length) { finder.doName("."); } else { for (int i = argHandler.getOptInd( )-1; i<args.length; i++) finder.doName(args[i]); } } protected FindFilter filter = new FindFilter( ); public static void usage( ) { System.err.println( "Usage: Find [-n namefilter][-s sizefilter][dir...]"); System.exit(1); } /** doName - handle one filesystem object by name */ private void doName(String s) { Debug.println("flow", "doName(" + s + ")"); File f = new File(s); if (!f.exists( )) { System.out.println(s + " does not exist"); return; } if (f.isFile( )) doFile(f); ...
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Publisher Resources

ISBN: 0596001703Supplemental ContentCatalog PageErrata