Finding and displaying hyperlinks in a web page

The Java application written below uses regular expressions to find and display hyperlinks contained within a Web page. After compiling the file, you should save a Web page to the same folder that contains ShowLinks.class.

import java.io.*;
import java.util.regex.*;
public class ShowLinks {
public static void main(String[] arguments) {
if (arguments.length < 1) {
System.out.println("Usage: java ShowLinks [page]");
System.exit(0);
}
String page = loadPage(arguments[0]);
Pattern pattern = Pattern.compile(" Matcher matcher = pattern.matcher(page);
while (matcher.find()) {
System.out.println( matcher.group(1));
}
}

private static String loadPage(String name) {
StringBuffer output = new StringBuffer();
try {
FileReader file = new FileReader(name);
BufferedReader buff = new BufferedReader(file);
boolean eof = false;
while (!eof) {
String line = buff.readLine();
if (line == null)
eof = true;
else
output.append(line + "\n");
}
buff.close();
} catch (IOException e) {
System.out.println("Error – " + e.toString());
}
return output.toString();
}
}

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