43	Link	Difficuty	Status
44	[Thinking in Java] Note: Chapter 21 - Concurrency	ACCEPTED
45	[Thinking in Java] Note: Chapter 20 - Annotations	ACCEPTED
46	[Thinking in Java] Note: Chapter 19 - Enumerated Types	ACCEPTED
47	[Thinking in Java] Note: Chapter 18 - IO	ACCEPTED
48	[Thinking in Java] Note: Chapter 17 - Containers in Depth	ACCEPTED
49	[Thinking in Java] Note: Chapter 16 - Array	ACCEPTED
50	[Thinking in Java] Note: Chapter 15 - Generics	ACCEPTED
51	[Thinking in Java] Note: Chapter 14 - Type Information	ACCEPTED
52	[Thinking in Java] Note: Chapter 13 - String	ACCEPTED
53	[Thinking in Java] Note: Chapter 12 - Error Handling with Exception	ACCEPTED
54	[Thinking in Java] Note: Chapter 11 - Container	ACCEPTED
55	[Thinking in Java] Note: Chapter 10 - Inner Class	ACCEPTED
56	[Thinking in Java] Note: Chapter 9 - Interface	ACCEPTED
57	[Thinking in Java] Note: Chapter 8 - Polymorphism	ACCEPTED
58	[Thinking in Java] Note: Chapter7 - Reusing Classes	ACCEPTED
59	[Thinking in Java] Note: Chapter 6 - Access Control	ACCEPTED
60	[Thinking in Java] Note: Chapter 5 - Initialization & Cleanup	ACCEPTED
61	[Thinking in Java] Note: Chapter 4 - Controlling Execution	ACCEPTED
62	[Thinking in Java] Note: Chapter 3 - Operators	ACCEPTED
63	[Thinking in Java] Note: Chapter 2 - Everything is an Object	ACCEPTED
64	[Thinking in Java] Note: Chapter 1 - Introduction to Objects	ACCEPTED
65	To be continued ...