Reading sequence of characters in Java-----HELP!!!

Question

I need help with this program here..Im new to Java and struggling to get this to work..here's the problem..
The program monitors a possibly infinite stream of characters from the keyboard (standard input). If it detects the sequence "www" it outputs a "0". If it detects the sequence "wow" it outputs a "1". DO NOT detect sequences within sequences. The program should exit cleanly when it detects an End Of Input. For example:
The following sequence wwowowwwowww<End Of Input> would produce the following result: 100
While the following sequence wwwowowwwwoowowow<End Of Input> would produce the following result: 0101

Answer 1

If you want to catch each key input realtime, you should use KeyEvent in a Swing/AWT GUI program. Capture each triplet in a small char array and compare it against "www" or "wow".
Here's a simple code that shows the principle:
public class Exl5{
  public static void main(String[] args){
    String s1 = "wwowowwwowww";
    String s2 = "wwwowowwwwoowowow";
    System.out.println(convert(s1));
    System.out.println(convert(s2));
  static String convert(String s){
    StringBuffer sb = new StringBuffer();
    int p = 0;
    while (p < s.length() - 2){
      String ss = s.substring(p, p + 3);
      if (ss.equals("wow")){
        sb.append("1");
        p += 3;
      else if (ss.equals("www")){
        sb.append("0");
        p += 3;
      else{
        ++p;
    return new String(sb);
}