done

src/main/java/rocks/zipcode/io/quiz4/objectorientation/StringAssembler.java

 public class StringAssembler {
     Character ch;
     String str;
+    StringBuilder sb = new StringBuilder();
 
     public StringAssembler(Character delimeter) {
 
     }
 
     public StringAssembler append(String str) {
-
-        int counter = 0;
-        String st = "";
-        StringBuilder sb = new StringBuilder();
-        List<String> list = new ArrayList<String>();
-
-            if(str != null) {
-                list.add(str);
-            }
-        for (int i = 0; i < list.size() ; i++) {
-
-            sb.append(str);
-        }
-
-        st = sb.toString();
-
-        StringAssembler sA = new StringAssembler(st);
-
-        return sA;
-
-
+            sb.append(str).append(this.ch);
+            return this;
     }
 
     public String assemble() {
 
-        StringBuffer sb = new StringBuffer();
-        String r = "";
-
-
-        sb.append(ch);
-
-
-        r = sb.toString();
-        return r;
+        return sb.deleteCharAt(this.sb.length() -1).toString();
     }
 }