Done

src/api/Iterator_Operation.java

@@ -0,0 +1,54 @@
+package api;
+
+import java.util.Iterator;
+
+public class Iterator_Operation<T> implements Iterator {
+    private Iterator<T> graphComponent;
+    private int mc, mc_2;
+
+
+    public Iterator_Operation(Iterator<T> iterator, int mc) {
+        this.graphComponent = iterator;
+        this.mc = mc;
+        this.mc_2 = mc;
+    }
+
+
+    @Override
+    public boolean hasNext() {
+        try {
+            if (mc != mc_2) {
+                throw new RuntimeException("Graph was changed since the iterator was constructed!");
+            }
+        } catch (RuntimeException e) {
+            e.printStackTrace();
+        }
+        return graphComponent.hasNext();
+    }
+
+    @Override
+    public Object next() {
+        try {
+            if (mc != mc_2) {
+                throw new RuntimeException("Graph was changed since the iterator was constructed!");
+            }
+        } catch (RuntimeException e) {
+            e.printStackTrace();
+        }
+        return graphComponent.next();
+    }
+
+    @Override
+    public void remove(){
+        try {
+            if (mc != mc_2) {
+                throw new RuntimeException("Graph was changed since the iterator was constructed!");
+            }
+        } catch (RuntimeException e) {
+            e.printStackTrace();
+        }
+        graphComponent.remove();
+    }
+
+}
+