<< Chapter < Page Chapter >> Page >

The screen output The code in Listing 16 produces the screen outputshown in Figure 9

Important considerations The important things to note about the output shown in Listing 16 include:

  • The second object instantiated from local class B is definitely a different object from the first object instantiated from local class B , as evidenced by a different value for bTime . (Compare the value of bTime in Figure 9 with the value of bTime in Figure 5 .) In other words, the second object was instantiated after the first object wasinstantiated.
  • Even though the two objects instantiated from local class B are different objects, they both belong to the same containing object, asevidenced by the same values for aTime in Figure 9 and Figure 5 .
  • The two objects instantiated from local class B each access the same final local variable belonging to the method named meth , as evidenced by the same values for methTime in Figure 9 and Figure 5 .

Run the program

I encourage you to copy the code from Listing 17 . Compile the code and execute it. Experiment with the code,making changes, and observing the results of your changes. Make certain that you can explain why your changes behave as they do.

Summary

In addition to a number of other items, a class definition can contain:

  • Member classes
  • Local classes
  • Anonymous classes
  • Nested top-level classes and interfaces

Member classes were explained in the previous module. This module explains local classes. The next module will explain anonymous classes.

A local class is a class that is defined within a block of Java code. While local classes are probably mostfrequently defined within method and constructors, they can also be defined inside static initializer blocks and instance initializers.

An object of the local class must be internally linked to an object of the enclosing class (which I often refer to as the containing object). A local class is truly an inner class because an object of the local class cannot exist in theabsence of an object of the enclosing class.

The methods of a local class have direct access to all the members in the hierarchy of enclosing classes,including private members. In addition, the methods of local classes have access to final local variables and final method parameters in the scope in which the local class is defined.

The containment hierarchy of local classes is independent of the inheritance hierarchy. However, it is technically possible toestablish an inheritance relationship between a local class and one of its enclosing classes.

Local classes may not be declared public , protected , private , or static .

Local classes cannot contain static members.

A local class has approximately the same relationship to a member class that a local variable in a method has to an instance variable of the classcontaining the method.

What's next?

The next module in this series will explain and discuss anonymous classes, and will also compare anonymous classes to local classes.

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java OOP: Local Classes
  • File: Java1638.htm
  • Published: 11/19/13

Questions & Answers

how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Object-oriented programming (oop) with java' conversation and receive update notifications?

Ask