complete

PlaylistChallenge.iml

@@ -5,7 +5,6 @@
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>

src/main/java/io/zipcoder/Music.java

@@ -4,11 +4,72 @@ public class Music {
 
     private String[] playList;
 
+
+    //String[] n=songs | Integer k=index of the song | String q= the name of the song you wish to switch to
+    //identify the Occurences
+    //get the length going forward
+    //get the length going backwards
+
     public Music(String[] playList){
+
+
         this.playList = playList;
+
     }
 
     public Integer selection(Integer startIndex, String selection){
-        return null;
+
+        return compareForwardBackward(startIndex, selection);
+    }
+
+
+
+
+
+
+    //method to go forward
+    public Integer forwardButton(Integer startingIndex, String selection){
+
+        Integer counter = 0;
+
+        for(Integer i = Integer.valueOf(playList[startingIndex]); i < playList.length; i++){
+            counter++;
+            if(playList.length-1 == startingIndex){
+                startingIndex = 0;
+            }else{
+                startingIndex++;
+            }
+        }
+        return counter;
+    }
+
+
+
+
+    //method to go backwards
+    public Integer backwardsButton(Integer startingIndex, String selection){
+
+        Integer counter = 0;
+
+        for(Integer i = Integer.valueOf(playList[startingIndex]); i <playList.length; i++){
+
+            counter++;
+            if(startingIndex==0){
+                startingIndex = playList.length-1;
+            }else{
+                startingIndex--;
+            }
+        }
+        return counter;
     }
+
+    public Integer compareForwardBackward(Integer startingIndex, String selection){
+
+        if(forwardButton(startingIndex,selection) < backwardsButton(startingIndex,selection)){
+            return forwardButton(startingIndex,selection);
+        }
+        return forwardButton(startingIndex, selection);
+    }
+
+
 }