if (argv.length < 2) {
System.out.println ("Usage: regex file [ ... ]");
return;
}
Pattern pattern = Pattern.compile (argv [0]);
Matcher matcher = pattern.matcher ("");
for (int i = 1; i < argv.length; i++) {
String file = argv [i];
BufferedReader br = null;
String line;
try {
br = new BufferedReader (new FileReader (file));
} catch (IOException e) {
System.err.println ("Cannot read '" + file
+ "': " + e.getMessage());
continue;
}
while ((line = br.readLine()) != null) {
matcher.reset (line);
if (matcher.find()) {
System.out.println (file + ": " + line);
}
}
br.close();
}
