Code for Exercises in Chapter 1:

Object-Oriented Programming

Exercise 1.3: Circle.java

Exercise 1.5: Shape.java

Exercise 1.7: Util.java

Exercise 1.8: Avg.java

Exercise 1.11: Tree.java and Forest.java

Exercise 1.13: Violin.java

Exercise 1.14: Employee.java

Exercise 1.15: Shapes.java and DrawApplet.java

Exercise 1.18: Tree.java