fifth push

src/main/java/rocks/zipcode/io/quiz4/collections/ComparableTreeSet.java

 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.Comparator;
+import java.util.TreeSet;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class ComparableTreeSet<_> {
+public class ComparableTreeSet<_> extends TreeSet<ComparableTreeSet<_>>  implements Comparable <ComparableTreeSet <_>> {
     private _[] arr;
+    private ComparableTreeSet<_> o;
+
     //
     public ComparableTreeSet(_... arr) {
         this.arr = arr;
     }
 
-
     public ComparableTreeSet() {
     }
 
     public int compareTo(ComparableTreeSet<_> o) {
         return 0;
     }
-
 }

src/main/java/rocks/zipcode/io/quiz4/collections/SimpleStringGroup.java

 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.Iterator;
+import java.util.function.Consumer;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class SimpleStringGroup {
+public class SimpleStringGroup implements Iterable{
     SimpleStringGroup ssg;
     Integer count;
 
-    public SimpleStringGroup() {
-        throw new UnsupportedOperationException("Method not yet implemented");
-    }
+//    public SimpleStringGroup() {
+//        throw new UnsupportedOperationException("Method not yet implemented");
+//    }
 
     public Integer count() {
         return count;
 
     public void clear() {
     }
+
+    @Override
+    public Iterator iterator() {
+
+        return null;
+    }
+
+    @Override
+    public void forEach(Consumer action) {
+    }
 }

src/main/java/rocks/zipcode/io/quiz4/generics/MyStack.java

 package rocks.zipcode.io.quiz4.generics;
 
+import java.util.Collection;
+import java.util.Iterator;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class MyStack<SomeType> {
-    MyStack<SomeType> myStack = new MyStack<>();
-    public MyStack() {
-        throw new UnsupportedOperationException("Method not yet implemented");
-    }
+public class MyStack<SomeType> implements Iterable<SomeType> {
+    private int n;
+
+//    public MyStack() {
+//        throw new UnsupportedOperationException("Method not yet implemented");
+//    }
 
     public Boolean isEmpty() {
 
     public SomeType pop() {
         return null;
     }
+
+    @Override
+    public Iterator iterator() {
+        return null;
+    }
 }