final project q9

finalproject/Question9/IUser.java

@@ -0,0 +1,13 @@
+/*
+ * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
+ * Date: 2022-04-25
+ * Description: This is the interface of IUser.
+ */
+
+public interface IUser {
+	public String getName();
+
+	public int getBook();
+
+	public void moreBook(int number) throws NotALenderException;
+}