Exercise 4.1 and 4.2 in the book. The topic is constructors in Java.
Exercise 4.5 in the book. The topics are arrays and strings.
Exercise 4.6 in the book. The topic is overloading methods.
Exercise 4.11 in the book. The topic is the special method finalize.
Exercise 4.19 in the book. The topic is two-dimensional arrays and initialization.
Discuss the problems involved in scheduling when to run the garbage collection.
Demonstrate that the Java garbage collector finds and frees memory taken up by a network of objects (object pointing to other objects and so on) that can no longer be reached from the current program.