Exam 4: More Object Concepts

When you write your own constructors, you cannot write versions that receive parameters.

In a Java ____________________ statement, you use a wildcard symbol to represent all the classes in a package.

List the three things you can do that allow you to use prewritten classes.

When you overload a Java method, you write multiple methods with a shared name.

It is illegal to declare the same variable name more than once within a block.

If a class's only constructor requires an argument, you must provide an argument for every ____ of the class that you create.

You can use the asterisk (*) as a ____, which indicates that it can be replaced by any set of characters.

When an application contains just one version of a method, you can call the method using a(n) ____ of the correct data type.

Object-oriented programmers use the term ____ when a child class contains a field or method that has the same name as one in the parent class.

When you multiply an int and a double , the result is the int .

Describe the impact that blocks and methods have on variables with the same name.

What is the phenomenon called shadowing?

It is a convenience to be able to use one reasonable name for ____ that are functionally identical except for argument types.

What is overloading a method? What conditions must be satisfied in the parameter lists of an overloaded method?

What does it mean when a variable overrides another variable? 

What is automatic type promotion in method calls? Give an example of how this works.

int aMethod(int x) void aMethod(int x) In the above statements, explain why these two methods are illegal in the class.

Describe how a Java variable comes into and out of scope.

Due to automatic type promotion, when a method with a double parameter is passed an integer, the integer will be promoted to a(n) ____.

Write Java statements that use the now() and of() methods in the LocalDate class.