Nested Classes

Front 1

The Java programming language allows you to define a class within another class. Such a class is called a .......... class

Back 1

Nested Class

Front 2

Nested classes are divided into two categories...

Back 2

static and non-static

Front 3

Nested classes that are declared static are called.......... Non-static nested classes are called ..........

Back 3

static nested classes, inner classes

Front 4

.......... have access to other members of the enclosing class, even if they are declared private.

Back 4

Non-static nested classes (inner classes),

Front 5

.......... do not have access to other members of the enclosing class.

Back 5

Static nested classes

Front 6

Why Use Nested Classes?

3 reasons

Back 6

1. It is a way of logically grouping classes that are only used in one place. e.g. Helper Classes.
2.It increases encapsulation
3. It can lead to more readable and maintainable code

Front 7

Like static class methods, a static nested class cannot refer directly to instance variables or methods defined in its enclosing class: it can use them only through an ..........

Back 7

object reference.

Front 8

Static nested classes are accessed using the enclosing class name:

Back 8

e.g.
OuterClass.StaticNestedClass

Front 9

What is the syntax to create an object for the static nested class?

Back 9

OuterClass.StaticNestedClass nestedObjectname = new OuterClass.StaticNestedClass();

Front 10

Objects that are instances of an inner class exist within an instance of the outer class. Consider the following classes:

Back 10

class OuterClass {
...
class InnerClass {
...
}
}

Front 11

An instance of InnerClass can exist only within an instance of .......... and has direct access to the methods and fields of its enclosing instance.

Back 11

OuterClass

Front 12

To instantiate an inner class, you must first instantiate the outer class. Then, create the inner object within the outer object with this syntax:

Back 12

OuterClass.InnerClass innerObject = outerObject.new InnerClass();

Front 13

There are two additional types of inner classes. These are .......... and .......... classes.

Back 13

Local and Anonymous Classes.

Front 14

Local Classes are declared where?

Back 14

You can declare an inner class within the body of a method.

Front 15

An anonymous class is the same as a local class except it is ..........

Back 15

without a name.

Front 16

What modifiers can you apply to an inner class?

Back 16

You can use the same modifiers for inner classes that you use for other members of the outer class.