genetic SortedGroup

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

@@ -1,18 +1,31 @@
 package rocks.zipcode.io.quiz4.generics;
 
+
+import java.util.Collections;
+
 /**
  * @author leon on 18/12/2018.
  */
 public class SortedGroup<_> extends Group<_> {
+
+
     @Override
     public void insert(Object value) {
+        myGroup.add((_)value);
+        Collections.sort(myGroup,null );
+
+
     }
 
     @Override
     public void delete(Object value) {
+        myGroup.remove((_)value);
+
+
     }
 
     public Integer indexOf(_ firstValue) {
-        return null;
+
+        return myGroup.indexOf(firstValue);
     }
 }

src/test/java/rocks/zipcode/io/quiz4/generics/sortedgroup/integersortedgroup/IntegerSortedGroupInsertTest.java

@@ -2,8 +2,8 @@ package rocks.zipcode.io.quiz4.generics.sortedgroup.integersortedgroup;
 
 import org.junit.Assert;
 import org.junit.Test;
-import org.omg.CORBA.INTERNAL;
-import rocks.zipcode.io.quiz4.generics.Group;
+//import org.omg.CORBA.INTERNAL;
+//import rocks.zipcode.io.quiz4.generics.Group;
 import rocks.zipcode.io.quiz4.generics.SortedGroup;
 
 /**