Implemented iterator

list/src/main/java/de/vivi/list/list/ArrayByteList.java

@@ -1,6 +1,7 @@
 package de.vivi.list.list;
 
 import java.util.Arrays;
+import java.util.Iterator;
 
 public class ArrayByteList implements ByteList {
 
@@ -51,6 +52,11 @@ public class ArrayByteList implements ByteList {
         return values.length;
     }
 
+    @Override
+    public Iterator<Byte> iterator() {
+        return new ByteListIterator(this);
+    }
+
     @Override
     public String toString() {
         return Arrays.toString(values);

list/src/main/java/de/vivi/list/list/ByteList.java

@@ -1,6 +1,6 @@
 package de.vivi.list.list;
 
-public interface ByteList {
+public interface ByteList extends Iterable<Byte> {
 
     void add(byte value);
 

list/src/main/java/de/vivi/list/list/ByteListIterator.java

@@ -0,0 +1,25 @@
+package de.vivi.list.list;
+
+import java.util.Iterator;
+
+public class ByteListIterator implements Iterator<Byte> {
+
+    private int index;
+
+    private final ByteList list;
+
+    public ByteListIterator(ByteList list) {
+        this.index = 0;
+        this.list = list;
+    }
+
+    @Override
+    public boolean hasNext() {
+        return index < list.size();
+    }
+
+    @Override
+    public Byte next() {
+        return list.get(index++);
+    }
+}

list/src/main/java/de/vivi/list/list/LinkedByteList.java

@@ -1,5 +1,7 @@
 package de.vivi.list.list;
 
+import java.util.Iterator;
+
 public class LinkedByteList implements ByteList {
 
     private static class Entry {
@@ -117,6 +119,11 @@ public class LinkedByteList implements ByteList {
         return size;
     }
 
+    @Override
+    public Iterator<Byte> iterator() {
+        return new ByteListIterator(this);
+    }
+
     @Override
     public String toString() {
         StringBuilder result = new StringBuilder("[");