Adding AudioBooks

Finishing AudioBook class, adding list and save for the audiobooks.
Adding extract method for both audiobooks and songs.
Resolving the id incremention issue.

1 files changed, 11 insertions, 0 deletions

diff --git a/Pair.java b/Pair.java
new file mode 100644
index 0000000..d7648d0
--- /dev/null
+++ b/Pair.java
@@ -0,0 +1,11 @@
+public class Pair<S, T> {
+    public final S x;
+    public final T y;
+
+    public Pair(S x, T y) {
+        this.x = x;
+        this.y = y;
+    }
+    public S getX(){return x;}
+    public T getY(){return y;}
+}