End of the Chapter

If you feel equal to the task, review the following topics.

• Data type.
• Primitive data types vs. objects.
• Picture of a String object.
• The two steps of an assignment operator.
• Definition of object reference.
• What each type of variable contains, and how each type is used.
• Garbage and garbage collection.
• Assigning a new value to a reference variable.
• The == operator and reference variables.
• Two references to one object.
• String literals.
• equals() method.

The next chapter continues the discussion of objects and classes.