/**
 * This program displays all of the words in the dictionary ending in "ING"
 *
 * @author Dave Slemon
 * @version v101
 */

import java.util.Scanner;
import java.io.*;  //for IOException, File and FileWriter

public class INGwords 
{

  //display all the words with "ing" 
  public static void main(String[] args) 
  { //main
      Scanner dictionary;
      int count=0;
      
      
      String s="";
      String endingStr = "";
      String [ ] ingWords = new String[15000];
      
      long start = 0;
      long finish = 0;
      long timeElapsed = 0;
      
      System.out.println("Starting ... ");
      start = System.currentTimeMillis();
      
      try 
      { //t
        dictionary = new Scanner(  new File ("words.txt") );

        while ( dictionary.hasNextLine() )
        {//w
            s = dictionary.nextLine();
            
            
            //make sure the word ends in ing
            if ( s.contains("ing") )
            {//s
              endingStr =  s.substring(s.length() - 3)  ;
              if (endingStr.equals("ing"))
              {
                    System.out.println( s );
                    ingWords[count] = s;
                    count++;
              }
            } //s


        }//w
        
        finish = System.currentTimeMillis();
        timeElapsed = finish - start;
        
        System.out.println("count = " + count + "   time: " + timeElapsed + " msec" );
        System.out.println("Finished.");
      } //t
      catch (Exception e) 
      {//e
        System.out.println("Error: file not found.");
      }//e

      
      System.out.println();

      
      //Writing the ingWords to a file called,  ingwords.txt
      try 
      {
         FileWriter out = new FileWriter("ingwords.txt");
         for(int i=0; i< count; i++)
         {
             out.write(ingWords[i] + "\n");
         }
         out.close();
         System.out.println("Successfully created file ingwords.txt");
      }
      catch (IOException e) 
      {
          System.out.println("An error occurred.");
          e.printStackTrace();
      }
      
  } //main

}