/* 
 * Important! You must import the util and io libraries for this to work!
 */
import java.util.StringTokenizer;
import java.io.*;

/*
 * This example program illustrates how to use a BufferedReader to read
 * lines repeatedly from standard input and how to use a StringTokenizer to
 * read words from a string. It also illustrates the use of exception
 * handling by try-catch to handle the potential I/O errors.
 */
public class DemoInteract 
  {
  public static void main(String[] args)
    {
    try  // We need try-catch because of potential problems with I/O.
      {
      /* 
       * We create a BufferedReader from standard input. 
       */
      BufferedReader inputReader = 
		new BufferedReader(new InputStreamReader(System.in));

     /* The following while loop reads lines from standard input. */ 
      boolean moreInput = true; 
      String oneLine;
      while (moreInput) 
        {
	System.out.print("Please input your text. >>"); 
        oneLine = inputReader.readLine(); // Read a line from standard input.
        if (oneLine.equals("quit"))
 	  {
	  moreInput = false;
	  }
        else
          {
          StringTokenizer wordGetter = new StringTokenizer(oneLine);

	  /* 
	   * The following while loop reads individual words from a string 
	   * and echos them to standard output on separate lines. 
	   */
          while (wordGetter.hasMoreTokens())
	    {
            String aWord = wordGetter.nextToken(); 
	    System.out.println(aWord);
	    }
          System.out.println(); 
	  }
        } 

      /* Now we close the input stream. */
      inputReader.close();
      } 
    catch(IOException anError)
      {
      anError.printStackTrace(); // Show the function call stack for debugging.
      }
    }
  }