Add method works

.gitignore

@@ -1,2 +1,3 @@
 /meghanadaFormatter.xml
 *.class
+*.jgrasp_canvas.xml

SongList.java

@@ -36,15 +36,19 @@ public class SongList {
             m_last = to_add;
             m_last.setLink(m_last);
         }
+        else if (m_last.getTitle().compareTo(title) <= 0) {
+            to_add.setLink(m_last.getLink());
+            m_last.setLink(to_add);
+            m_last = to_add;
+        }
         else {
-            Song current = m_last.getLink();
-            while ((current.getTitle().compareTo(title)) > 0 && (current.getLink() != m_last)) {
+            // start from last song
+            Song current = m_last;
+            while (title.compareTo(current.getLink().getTitle()) >= 0) {
                 current = current.getLink();
             }
             to_add.setLink(current.getLink());
             current.setLink(to_add);
-            if (current.getTitle().compareTo(to_add.getTitle()) > 0)
-                m_last = null;
         }
         m_numElements += 1;
     }