Directory and Filesystem Operations - Java - page 461

}

static static class class DemoService DemoService implements implements Runnable {

public public void void run () {

try try {

Thread . sleep ( 1000 );
System . out . println ( "Creating file" );
new new File ( tempDirPath + "/MyFileSema.for" ). createNewFile ();

Thread . sleep ( 1000 );
System . out . println ( "Stopping WatcherServiceDemo" );
done = true true ;

Thread . sleep ( 1500 );
mainRunner . interrupt ();
} catch

catch ( Exception e ) {
System . out . println ( "Caught UNEXPECTED " + e );

}

}

}

}

Program: Find

The program shown in Example 11-2 implements a small subset of the Windows Find Files
dialog 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 Parsing Command-Line Argu-
ments ) . It has a hook for filtering by file size, whose implementation is left as an exercise for
the reader.

Example 11-2. src/main/java/dir_file/Find.java
/**
* Find - find files by name, size, or other criteria. Non-GUI version.
*/
public public class Find {

/** Main program */
public

class Find

public static void main ( String [] args ) {

Find finder = new

static void

new Find ();
GetOpt argHandler = new new GetOpt ( "n:s:" );

int int c ;

while while (( c = argHandler . getopt ( args )) != GetOpt . DONE ) {

switch switch ( c ) {

case

case 'n' : finder . filter . setNameFilter ( argHandler . optarg ()); break break ;