Exam 5: Writing Classes

A _______________ variable is shared among all instances of a class.

When applied to instance variables, the ________________ visibility modifier enforces encapsulation.

Write a method called threeOfAKind that takes in three integer parameters and returns true if all three of them are the same, false otherwise.

If a service is so complex that it cannot be reasonably be implemented using one method, it is often helpful to decompose it to make use of ________________ support methods.

Variables that are declared as static are shared among all instances of a class.

The ________________ reference always refers to the currently executing object.

A ________________ diagram helps us visualize the contents of and relationships among the classes of a program.

Explain why a static method cannot refer to an instance variable.

A programmer is required to define a constructor for every class.

Explain the difference between actual parameters and formal parameters.

Write a method that prints your name, age, and major. The method should accept no parameters and return no value.

Write a method called containsPair that takes in three integer parameters and returns true if any two of the input parameters are the same.

Which of the following method headers is most likely a header for a mutator method?

A(n) ___________________ object is one that is made up, at least in part, of other objects.

A return statement is not required at the end of every method.

Write a method called square that takes in an integer value and returns the integer squared. Your method should use the Math.pow() method.

Write a method called isPalindrome that accepts a String as a parameter and returns true if the String is a palindrome, and false otherwise. You may assume that the entered String consists entirely of lowercase letters (meaning it contains no numbers, spaces, punctuation, etc). Hint: write code that creates a new string that is the original string reversed, and then check to see if the two strings are equal.

A main method can only access static or local variables.

The versions of an overloaded method are distinguished by ___________________________.

Aggregation is sometimes described as a has-a relationship.