Java tutorial
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.StreamTokenizer; public class Main { public static void main(String args[]) throws IOException { BufferedReader inData = new BufferedReader(new InputStreamReader(System.in)); StreamTokenizer inStream = new StreamTokenizer(inData); inStream.commentChar('#'); boolean eof = false; do { int token = inStream.nextToken(); switch (token) { case StreamTokenizer.TT_EOF: System.out.println("EOF encountered."); eof = true; break; case StreamTokenizer.TT_EOL: System.out.println("EOL encountered."); break; case StreamTokenizer.TT_WORD: System.out.println("Word: " + inStream.sval); break; case StreamTokenizer.TT_NUMBER: System.out.println("Number: " + inStream.nval); break; default: System.out.println((char) token + " encountered."); if (token == '!') eof = true; } } while (!eof); } }