Programming II Midterm

The StringBuilder class's insert method allows you to insert an ___ into the calling's object's string

Char array Primitive type String object

Wrapper class for the char data type

Character class

True/False | static methods are called from an instance of a class

False

Is [ StringBuilder str = "Tuna sandwich"; ] correct?

No

Defined class: SavingsAccount Public static method: getNumberOfAccounts Class object: referenced by account20 variable Which will call getNumberOfAccounts

SavingsAccount.getNumberOfAccounts();

Which of the following statements will convert the double variable, d = 543.98 to a string?

String str = Double.toString(d);

Breaking a string down into tokens

Tokenizing

enum Tree {OAK, MAPLE, PINE} What is the fully-qualified name of the PINE enum constant?

Tree.Pine

A wrapper class is a class that is "wrapped around" a primitive data type and allows you to create objects instead of variables.

True

Protected members may be accessed by methods in the same package or in a subclass, EVEN when the subclass is in a different package

True

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

True

When an objects method is passed as an argument, it is actually a reference to the object that is passed

True

If a class contains an abstract method

Umm

Which key word indicates that a class inherits from another class?

extends

Character.toLowerCase(star.charAt(5))

f

The JVM periodically performs the ___ process to remove unreferenced objects from memory

garbage collection

is the term for the relationship created by object aggregation

has a

example of lambda expression

int x = x * factor;

When the this variable is used to call a constructor

it must be the first statement in the constructor making the call

You cannot use the == operator to compare the contents of

objects

A subclass may call an overridden superclass method by:

prefixing its name with the super key word and a dot (.)

Correctly specifies two interfaces

public class ClassA implements Interface1, Interface2