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  1. import java.io.BufferedReader;
  2. import java.io.FileReader;
  3. import java.io.IOException;
  4. import java.util.ArrayList;
  5. import java.util.List;
  6. import java.util.Random;
  7.  
  8. class LoginGenerator
  9. {
  10.     private final List<String> words;
  11.     private final int size;
  12.     private Random rng = new Random();
  13.  
  14.     public LoginGenerator(String dictionary) throws IOException
  15.     {
  16.         try (BufferedReader in = new BufferedReader(new FileReader(dictionary)))
  17.         {
  18.             words = new ArrayList<String>();
  19.             String line;
  20.             while ((line = in.readLine()) != null)
  21.             {
  22.                 if (!line.endsWith("'s"))
  23.                 {
  24.                     words.add(line);
  25.                 }
  26.             }
  27.             size = words.size();
  28.         }
  29.     }
  30.  
  31.     private String randomWord()
  32.     {
  33.         int randomIndex = rng.nextInt(size);
  34.         return words.get(randomIndex);
  35.     }
  36.  
  37.     public String randomLogin()
  38.     {
  39.         return randomWord() + "-" + randomWord();
  40.     }
  41.  
  42.     public static void main(String[] args)
  43.     {
  44.         String dictionary = "/usr/share/dict/words"; 
  45.         try
  46.         {
  47.             LoginGenerator generator = new LoginGenerator(dictionary);
  48.             for (int i = 0; i < 100; ++i)
  49.             {
  50.                 System.out.println(generator.randomLogin());
  51.             }
  52.         }
  53.         catch (IOException ex)
  54.         {
  55.             System.out.println("error reading from " + dictionary);
  56.             ex.printStackTrace();
  57.         }
  58.     }
  59. }
  60.  
Success #stdin #stdout #stderr 0.1s 320256KB
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stdin
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Standard input is empty
stdout
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error reading from /usr/share/dict/words
stderr
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java.io.FileNotFoundException: /usr/share/dict/words (No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at java.io.FileInputStream.<init>(FileInputStream.java:93)
	at java.io.FileReader.<init>(FileReader.java:58)
	at LoginGenerator.<init>(Main.java:16)
	at LoginGenerator.main(Main.java:47)
https://ideone.com/ebRXQn
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
secret

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