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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. package Exercise6;
  9.  
  10. import java.io.BufferedReader;
  11. import java.io.FileReader;
  12. import java.util.ArrayList;
  13. import java.util.Scanner;
  14. import java.io.*;
  15. import java.awt.*;
  16.  
  17.  
  18. public class LadderGame
  19. {
  20.     public static void ladder(String startingword, String endingword, ArrayList<String> dictionary, ArrayList<String> history, int count)
  21.     {
  22.         String tempword = dictionary.get(count);
  23.         count++;
  24.         int count2 = 0;
  25.  
  26.         for(int i = 0; i < tempword.length(); i++)
  27.             if(startingword.charAt(i) != tempword.charAt(i))
  28.                 count2++;
  29.  
  30.         if(count2 == 1)
  31.         {
  32.             startingword = tempword;
  33.             history.add(startingword);
  34.         }
  35. //        else
  36. //            if(tempword.equals(endingword))
  37. //                round++;
  38.  
  39.  
  40.         if(startingword.equals(endingword))
  41.             System.out.println(endingword);
  42.         else
  43.         {
  44.             if(count < dictionary.size())
  45.                 ladder(startingword, endingword, dictionary, history, count);
  46. //            else if(count == dictionary.size() && round > 0)
  47. //            {
  48. //                ladder(startingword, endingword, dictionary, history, 0, round - 1);
  49. //            }
  50.             else
  51.                 System.out.println("No ladder found.");
  52.         }
  53.  
  54.  
  55.     }
  56.  
  57.     public static void main(String[] args)
  58.     {
  59.         Scanner sc = new Scanner(System.in);
  60.  
  61.         ArrayList<String> dictionary = new ArrayList<String>();
  62.         ArrayList<String> history = new ArrayList<String>();
  63.  
  64.         BufferedReader br;
  65.         FileReader fr;
  66.  
  67.         System.out.println("Enter starting word.");
  68.         String startingword = sc.nextLine().toUpperCase();
  69.         System.out.println("Enter ending word.");
  70.         String endingword = sc.nextLine().toUpperCase();
  71.  
  72.         try
  73.         {
  74.             fr = new FileReader("/Users/Huangyonghuan/Downloads/words.txt");
  75.             br = new BufferedReader(fr);
  76.             int lines = countLines();
  77.  
  78.  
  79.             for(int i = 0; i < lines; i++)
  80.             {
  81.                 String readword = br.readLine().toUpperCase();
  82.                 if(readword.length() == endingword.length())
  83.                     dictionary.add(readword);
  84.             }
  85.         }
  86.         catch (FileNotFoundException fnex)
  87.         {
  88.             System.err.println("Exception!");
  89.         }
  90.         catch (IOException e)
  91.         {
  92.             e.printStackTrace();
  93.         }
  94.  
  95.         ladder(startingword, endingword, dictionary, history, 0);
  96.     }
  97.  
  98.     public static int countLines()
  99.     {
  100.         BufferedReader br;
  101.         FileReader fr;
  102.         int lines = 0;
  103.         try
  104.         {
  105.             fr = new FileReader("/Users/Huangyonghuan/Downloads/words.txt");
  106.             br = new BufferedReader(fr);
  107.             while (br.readLine() != null) lines++;
  108.         }
  109.         catch (FileNotFoundException fnex)
  110.         {
  111.             System.err.println("Exception!");
  112.         }
  113.         catch (IOException e)
  114.         {
  115.             e.printStackTrace();
  116.         }
  117.         return lines;
  118.     }
  119.  
  120. /*    if(endingword.equals(readword))
  121.         for(int i = 0; i < endingword.length(); i++)
  122.         if(startingword.charAt(i) != readword.charAt(i))
  123.         tempword.charAt(i) = readword.charAt(i);*/
  124. /*            fr = new FileReader("/Users/Huangyonghuan/Downloads/words.txt");
  125.             br = new BufferedReader(fr);
  126.             String readword = br.readLine().toUpperCase();
  127.  
  128.             if(endingword.length() == readword.length())
  129.             {
  130.                 for(int i = 0; i < endingword.length(); i++)
  131.                     if(endingword.charAt(i) != readword.charAt(i))
  132.                     {
  133.                         count++;
  134.                         location = i;
  135.                     }
  136.                 if(count == 0)
  137.                     System.out.println(endingword);
  138.                 else if(count == 1)
  139.                 {
  140.                     for(int i = 0; i < location; i++)
  141.                         tempword += endingword.charAt(i);
  142.                     tempword += readword.charAt(location);
  143.                     for(int i = location + 1; i < endingword.length(); i++)
  144.                         tempword += endingword.charAt(i);
  145.                     System.out.println(tempword);
  146.                     ladder(tempword, endingword);
  147.                 }
  148.  
  149.             }
  150.             else
  151.                 return ladder(startingword, endingword);*/
  152. }
  153. /*        if(tempword.equals(endingword))
  154.         {
  155.             if(count2 == 1)
  156.                 System.out.println(endingword);
  157.             else if(count2 > 1)
  158.                 round++;
  159.         }
  160.         else
  161.             if(count2 == 1 && !(history.contains(tempword)))
  162.             {
  163.                 startingword = tempword;
  164.                 history.add(startingword);
  165.             }*/
  166.  
  167. /*            do
  168.             {
  169.                 String readword = br.readLine().toUpperCase();
  170.                 if(readword.length() == endingword.length())
  171.                     dictionary.add(readword);
  172.                 if(readword.equals(""))
  173.                     t++;
  174.             }while(t == 0);*/
  175.  
  176. /*        String tempword = dictionary.get(count);
  177.         count++;
  178.         int count2 = 0;
  179.  
  180.         for(int i = 0; i < tempword.length(); i++)
  181.             if(startingword.charAt(i) != tempword.charAt(i))
  182.                 count2++;
  183.  
  184.         if(count2 == 1)
  185.         {
  186.             startingword = tempword;
  187.             history.add(startingword);
  188.         }
  189. //        else
  190. //            if(tempword.equals(endingword))
  191. //                round++;
  192.  
  193.  
  194.         if(startingword.equals(endingword))
  195.             System.out.println(endingword);
  196.         else
  197.         {
  198.             if(count < dictionary.size())
  199.                 ladder(startingword, endingword, dictionary, history, count, round);
  200. //            else if(count == dictionary.size() && round > 0)
  201. //            {
  202. //                ladder(startingword, endingword, dictionary, history, 0, round - 1);
  203. //            }
  204.             else
  205.                 System.out.println("No ladder found.");
  206.         }*/
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:8: error: class, interface, or enum expected
package Exercise6;
^
1 error
stdout
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Standard output is empty
https://ideone.com/oLnPGy
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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