refactored testing

src/uebung09/chess/Board.java

@@ -1,16 +1,16 @@
 package uebung09.chess;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
+
 import uebung09.iterator.Array2dIterator;
 
-public class Board extends Array2dIterator<Piece>{
-    private final Piece[][] field = new Piece[8][8];
-    private final List<Piece> pieces = new ArrayList<>();
 
-    Board(){
-        
-    }
+public class Board implements Iterable<Piece>{
+    private final Piece[][] field = new Piece[8][8];
+    //private final List<Piece> pieces = new ArrayList<>();
+
 
     void add(Piece piece) {
         if (piece.getBoard() != this)
@@ -42,7 +42,7 @@ public class Board extends Array2dIterator<Piece>{
     }
 
     public void check() {
-        for (Piece p1 : pieces) {
+        for (Piece p1 : iterator()) {
             System.out.println(p1.toString());
             for (Piece p2 : pieces)
                 if (p1 != p2)
@@ -56,4 +56,11 @@ public class Board extends Array2dIterator<Piece>{
     public String toString() {
         return pieces.toString();
     }
+
+    @Override
+    public Iterator<Piece> iterator() {
+        // TODO Auto-generated method stub
+        return new Array2dIterator<>(null);
+        //throw new UnsupportedOperationException("Unimplemented method 'iterator'");
+    }
 }