arrAnalyz 11 - 11

tictactoe 21 - 21
waveGener 10 - 10
Total     41 - 108

src/main/java/rocks/zipcode/io/quiz3/arrays/WaveGenerator.java

@@ -1,10 +1,47 @@
 package rocks.zipcode.io.quiz3.arrays;
 
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Arrays;
+
 /**
  * @author leon on 09/12/2018.
  */
 public class WaveGenerator {
     public static String[] wave(String str) {
-        return null;
+
+
+        String[] waveArr = new String[str.length()];
+        char[] charArr = str.toLowerCase().toCharArray();
+
+        for (int i = 0; i < waveArr.length; i++) {
+
+            StringBuilder builder = new StringBuilder();
+
+            for (int j = 0; j < waveArr.length; j++) {
+                if (charArr[i] >= 97 && charArr[i] <= 122) {
+
+                    if (j == i && charArr[j] >= 97 && charArr[j] <= 122) {
+                        String upperLetter = String.valueOf(charArr[j]).toUpperCase();
+                        builder.append(upperLetter);
+                    } else {
+                        builder.append(charArr[j]);
+                    }
+
+                }
+            }
+            waveArr[i] = builder.toString();
+        }
+
+
+        ArrayList<String> waveList = new ArrayList<>();
+
+        for (String s: waveArr) {
+            if(s.length() != 0){
+                waveList.add(s);
+            }
+        }
+
+        return waveList.toArray(new String[waveList.size()]);
     }
 }