add solution of "WordGuess" task

java-tester-x · java-tester-x · commit 8507562f7c30 · 2014-02-25T20:14:35.000+02:00
diff --git a/difficult/WordGuess.java b/difficult/WordGuess.java
@@ -26,11 +26,90 @@
 
 package javaexercises.difficult;
 
+import java.util.Random;
+import java.util.Scanner;
+
 public class WordGuess {
     
+    private final String[] words = {
+        "testing", "hello", "world", "template", "java"
+    ,   "maining", "computer", "processor", "univercity"
+    ,   "boolean", "string", "integer", "character"
+    ,   "indicator", "controller", "model", "view"
+    };
+    
+    private String secretWord;
+    
+    private boolean[] secretWordMatches;
+    
     public static void main(String[] args)
     {
         WordGuess aWordGuess = new WordGuess();
+        aWordGuess.setSecretWord();
+        aWordGuess.runGame();
+    }
+
+    private void setSecretWord(String word) {
+        secretWord = word;
+    }
+    
+    private void setSecretWord() {
+        Random rand = new Random();        
+        secretWord = words[rand.nextInt(words.length-1)];
+    }
+    
+    private String getSecretWord() {
+        return secretWord;
     }
     
+    private String getTrialWordWithMatches()
+    {
+        StringBuilder str = new StringBuilder();
+        for (int i = 0; i < secretWord.length(); i++) {
+           str.append( (secretWordMatches[i] ? secretWord.charAt(i) : '_') );
+        }
+        return str.toString();
+    }
+    
+    
+    private void checkTrialWord(char ch)
+    {
+        for (int i = 0; i < secretWord.length(); i++)
+        {
+            if (secretWordMatches[i]) {
+                continue;
+            }
+            secretWordMatches[i] = secretWord.charAt(i) == ch;
+        }        
+    }
+    
+    private void runGame()
+    {
+        Scanner in = new Scanner(System.in);        
+        secretWordMatches = new boolean[secretWord.length()];                
+        int trials = 0;
+        while (true) {
+            System.out.print("Key in one character or your guess word: ");
+            String trialWord = (in.hasNext()) ? in.next() : "";
+            
+            trials++;
+            
+            if (trialWord.length() < 1) {
+                continue;
+            }
+            
+            if (trialWord.length() == 1) {                
+                checkTrialWord(trialWord.charAt(0));
+                trialWord = getTrialWordWithMatches();
+                System.out.printf("Trail %1$d: %2$s\n", trials, trialWord);
+                
+            }
+                        
+            if (trialWord.equals(secretWord)) {
+                System.out.printf("Trail %d: Congratulation!\n", trials);
+                break;
+            }
+        }
+        System.out.printf("You got in %d trials\n", trials);
+    }
 }
