Introductie type ArrayCycle en consequent maken van add en remove methodes: nu zonder type in de naam.

java/src/pm/util/ArrayCycle.java

@@ -0,0 +1,31 @@
+package pm.util;
+
+import java.util.ArrayList;
+
+public class ArrayCycle<T> extends ArrayList<T> {
+    protected static final long serialVersionUID = 1L;
+
+    protected int index = 0;
+
+    public T current() {
+        return this.get(index);
+    }
+
+    public T previous() {
+        if (--index < 0) {
+            index = Math.max(0, size() - 1);
+        }
+        return get(index);
+    }
+
+    public T next() {
+        if (++index >= size()) {
+            index = 0;
+        }
+        return get(index);
+    }
+
+    public T reset() {
+        return get(index = 0);
+    }
+}