EJB newbie: Why getters and setters when I don't use them?
I'd like to know why I have to write getters and setters in my bean implementaion class when I don't use them. I have SQL statements in my entity bean class that does querying and updates and I don't need to get or set individual fields of my databse.
This must be a very trivial question for many, but I really dont know the answer to this one.
Thanks.
You can't get rid of them because they are built into iOS. It's annoying I know.
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Hi Dee12124,
Welcome to Apple Support Communities.
I am going to get you to do a soft reset that, I will hope fix some of your issues.
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Project Lombok - easier getters and setters
I came across [Project Lombok|http://projectlombok.org/] recently and I think it greatly simplifies common Java patterns. All those getters and setters needed to satisfy JPA, JSF, and CDI make conceptually trivial classes become hundred-line monsters. If you need to change a type (e.g. int to long) or a name, then you need to do the same thing three or more times, or you can delete and generate everything again, but this can be risky: you might delete and regenerate a method that contained some little but necessary extra logic (a null check with ?:, for example), which could be indistinguishable from boilerplate code at first sight.
I know this will be met with resistance, but I think a Lombok-like project should be incorporated into Java SE 8 or 9. Look at the great productivity improvements we had with Java 5 and Java 7 (specifically Project Coin). Look how easy it is to create an EJB in Java EE 6. People that would never consider EJBs in the past are now using them (me included) and enjoying!
Maybe Java tools could at least provide official tools to support Lombok, because it currently uses unsupported interfaces to do its work.
I think this post, if taken as an official feature request, would be off-topic here, but hey, I already have an account here and the conversation must start somewhere :-)MarcusF. wrote:
All those getters and setters needed to satisfy JPA, JSF, and CDI make conceptually trivial classes become hundred-line monsters. Only when you're doing something very wrong design-wise. Getters and setters are no problem, you generate them anyway. But go ahead, keep believing the incredibly trivial is what is keeping you from being productive.
Look how easy it is to create an EJB in Java EE 6.Yes its easier to CREATE an EJB. But it is still as hard as ever to understand the nuances of the technology and properly apply it without cutting into your own fingers. You still need to properly understand transaction management for example. But also stateless design, remote invocation, messaging, concurrency, etc. etc. Its still very, very hard. But yeah, annotations in stead of XML crud. That made -all- the difference right?
It isn't code that makes things easier. It never was and it never will be. But people keep focusing on simplifying the actual programming by spitting out API after API and framework after framework and in the mean time the technology never gets any easier, or better. Because the code is not where the problem is.
IMO of course. -
Question about getters and setters
I want to ask you a bit simple question. I know, you can show me google but i know to understand this by my example. My program code:
class Readers {
int age;
public Readers(){
age = 45;
public int getAge() {
return age;
public void setAge(int age) {
this.age = age;
public void print_age(){
System.out.println(+age);
class Main {
public static void main(String[] Args) {
Readers john = new Readers();
john.print_age();
Why do i need use getters and setters? Because without these methods I get the same result. My program works correctly. Can you explain the benefit of using getters and setters?
Thanks in advance ;)First, nobody said that you should use getters and setters in the first place. The only thing that's worse than dumb mutators/accessors would be the exposure of the attribute itself.
Second, you certainly don't need mutators "internally".
Third: consider you redesigning your class to store a person's birthdate instead of its age - makes sense if one thinks about it, doesn't it? If you have coded your entire program to access the "age" attribute of the object, you know have a problem because it was replaced by "birthday". The getter at least could calculate the current age from the birthdate - so no rewriting of the rest of your program would be necessary, just a small change in your getter. -
Getters and Setters in ActionScript and ECMAScript
Hi ,
This line is taken from a book , here the Author mentions that
In ActionScript , getters and setters is not necessary , they are a part of of the core ECMAScript language.
Can anybody please let me know what is meant by ECMAScript language ??
Thanks in advance .ECMAScript is an ECMA standard.
Getters and setters are not mandatory (that's what they mean).
However, they can be useful in many cases.
- You can check the value in a setter before assigning (e.g checking if it's null)
- You cannot override properties of a superclass but you can getters/setters just as you can methods
- You can take some action when the value of the property is changed. There are many examples in UIComponent classes of the Flex framework.
- You can put a breakpoint in a setter in order to debug data binding (see if it triggers)
- In order to optimize data binding, you can write [Bindable event="YourCustomEventNameHere")] before the getter/setter and dispatch this event when the value is set so as to enhance performance of data binding (if you just write [Bindable], your properties will be processed by the framework even if their value does not change).
Also, note how the synthax is different than Java.
// ActionScript
private var _myProperty:uint;
public function get myProperty():uint
return _myProperty;
public function set myProperty(value:uint):void
_myProperty = value;
// Java
private Integer myProperty;
public Integer getMyProperty():
return myProperty;
public void setMyProperty(value:Integer):
myProperty = value;
Avoid creating getters/setters a la Java in ActionScript (i.e not using the get/set keywords). This is something I have seen in some implementations or auto-generated code from UML. -
Hi,
Can any one tell me why do we need getters and setters both in class and backing bean? Is not a duplication?
Here is an example
In my class Dept I have getDept_Code,getDept_Name and setDept_Code,set_DeptName.
and in my backing bean(DeptBean) I have same getters and setters.
please note that in my Dept.jsp I use these as follows
value="#{DeptBean.dept_code}".
value="#{DeptBean.dept_name}"
My question is why dont we use getters and setters in Dept class. and do we need to have getters and setters in backing bean?
plz explain.You just can use the getters in Dept? You don't need to "flatten out the objects".
MyDto:public class MyDto {
private String field1;
private String field2;
// + getters + setters
}MyBean:public class MyBean {
private MyDto myDto;
// + getter + setter
}JSF<h:outputText value="#{myBean.myDto.field1}" /> -
Revision: 10676
Author: [email protected]
Date: 2009-09-29 07:06:03 -0700 (Tue, 29 Sep 2009)
Log Message:
Removing JavaScript getters and setters: Wei found out that these are not supported by Internet Explorer.
Modified Paths:
osmf/trunk/apps/samples/framework/HTMLGatewaySample/html-template/index.template.html
osmf/trunk/framework/MediaFramework/org/openvideoplayer/gateways/HTMLGateway.asHello ZeroThirtySeven,
Do you mean that you want to use group policy to make users can visit the web application in Internet Explorer version 7?
Enterprise Mode, a compatibility mode that runs on Internet Explorer 11 on Windows 8.1 Update and Windows 7 devices, lets websites render using a modified browser configuration that’s designed to emulate Internet Explorer 8.
We could check if the web application can run in the Enterprise mode.
If it can, please take a look at the following article to use group policy to turn on Enterprise Mode.
http://msdn.microsoft.com/en-us/library/dn640699.aspx
Please take a look at the following thread about set IE compatibility mode by group policy.
https://social.technet.microsoft.com/Forums/windowsserver/en-US/95c0b8e6-72b5-472f-a5cb-07b17a8294a1/ie-compatibility-mode-not-applying-via-group-policy
Best regards,
Fangzhou CHEN
Fangzhou CHEN
TechNet Community Support -
Overloaded constructors & getters and setters problem
I'm writing a driver class that generates two cylinders and displays some data. Problem is I don't understand the concept on overloaded constructors very well and seem to be stuck. What I'm trying to do is use an overloaded constructor for cylinder2 and getters and setters for cylinder1. Right now both are using getters and setters. Help would be appreciated.
Instantiable class
public class Silo2
private double radius = 0;
private double height = 0;
private final double PI = 3.14159265;
public Silo2 ()
radius = 0;
height = 0;
// Overloaded Constructor?
public Silo2(double radius, double height) {
this.radius = radius;
this.height = height;
// Getters and Setters
public double getRadius() {
return radius;
public void setRadius(double radius) {
this.radius = radius;
public double getHeight() {
return height;
public void setHeight(double height) {
this.height = height;
public double calcVolume()
return PI * radius * radius * height;
public double getSurfaceArea()
return 2 * PI * radius * radius + 2 * PI * radius * height;
Driver class I'm not going to show all the code as it's rather long. Here's snippets of what I have so far
So here's input one using setters
validateDouble reads from a public double method that validates the inputs, which is working fine.
public static void main (String [ ] args)
Silo2 cylinder1 = new Silo2();
Silo2 cylinder2 = new Silo2();
//Silo inputs
double radSilo1 = validateDouble("Enter radius of Silo 1:", "Silo1 Radius");
cylinder1.setRadius(radSilo1);
double heiSilo1 = validateDouble("Enter height of Silo 1:", "Silo1 Height");
cylinder1.setHeight(heiSilo1);
Output using getters
//Silo1 output
JOptionPane.showMessageDialog(null,"Silo Dimensions 1 " +
'\n' + "Radius = " + formatter.format(cylinder1.getRadius()) +
'\n' + "Height = " + formatter.format(cylinder1.getHeight()) +
'\n' + "Volume = " + formatter.format(cylinder1.calcVolume()) +
'\n' + "Surface Area = " + formatter.format(cylinder1.getSurfaceArea()));How can I apply an overloaded constructor to cylinder2?
Edited by: DeafBox on May 2, 2009 12:29 AMDeafBox wrote:
Hey man,
My problem is that I don't now how to use an overloaded constructor. I'm new to this concept and want to use an overloaded contructor to display data for cylinder2, and getters and setters to display data for cylinder1.So, again, what in particular is your problem?
Do you not know how to write a c'tor?
Do you not know how to use a c'tor to intialize an object?
Do you not understand overloading?
Do you not realize that overloading c'tors is for all intents and purposes identical to overloading methods? -
How struts invoking form getters and setters of a property
hi,
can anyone explain me how struts framework was calling the form properties getters and setters
i have an idea like preparing a string such that
if propert of text box is propertName, preparring a string with get and set making first letter capital
setPropertyName
getPropertyName
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i have another idea
getting the declared method of the form class and search for the string propertyname in the methods name, and sure this is also not perfect way
with regards
satyacan anyone tell where i can find libraries for access/manipulate beans.
and sample example to invoke getters and setter of the property but not like preparing String "setPropertyName" or "getPropertyName" and invoking the method i beleive there should be standard way
and also setPropertyName may take different type parameters i cannot keep number of if conditions to check for different datatypes
with regards
satya -
I updated my phone to the iOS7 and now when i try to use the keyboard, i can't see myself typing and it goes very slowly. I am confused to why this happened. It worked perfectly fine with iOS6. Any suggestions?
Hi imobl,
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ValueRef'ing array elements, getters and setters
Hi,
I was wondering what the appropriate way to have the getters and setters for an array to be in the Model object.
For example, what should the getter/setter for stuff in Stuff.java be?
In the jsp page:
<input_text .... valueRef="Stuff.stuff[0].property">
In Stuff.java:
private Blah[] stuff = new Blah[25];
In Blah.java
private String property;At a minimum,
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-- Adam Winer -
How to generater automatically getters and setters???
Hi!!!
Boys and Girls, how to generate automatically getters and setters like eclipse dialog or shortcut, using bea workshop(jpf file)?
Best Regards,
Pablocan anyone tell where i can find libraries for access/manipulate beans.
and sample example to invoke getters and setter of the property but not like preparing String "setPropertyName" or "getPropertyName" and invoking the method i beleive there should be standard way
and also setPropertyName may take different type parameters i cannot keep number of if conditions to check for different datatypes
with regards
satya -
Do you need getters and setters for C types?
Say, I have class declaration like so:
@interface MyClass : NSObject
int nValue;
-(void)someMethod:(int)v;
@end
and then the implementation:
#import "MyClass.h"
@implementation MyClass
-(id)init
//Initialization
if(self = [super init])
nValue = 0;
return self;
-(void)dealloc
[super dealloc];
-(void)someMethod:(int)v
int r = nValue;
nValue += r + v;
@end
Do I need a getter and a setter for the 'nValue' variable?Den B. wrote:
Do I need a getter and a setter for the 'nValue' variable?
No more so than you would in C++.
In Objective-C, if you really need to provide access to an objects internal values, you should you properties. If you don't need properties, then getters and setters are just as bad as they are anywhere. -
Why does audio stop when pavilion 23xi sleeps (using Windows 8)
why does audio stop when pavilion 23xi sleeps (using Windows 8)?
Hello again @st3lla,
I can understand the fear of messing up a computer when I first started seriously working on computers back in the early 90's I had to format and re-install my operating system twice a day for quite a while before I figured out a very important step (at least important for me), and that was after I made a change to my computer to restart it. This way if I messed something up I only had to undo one thing and not 50 because I went wild on it. lol
Anyways, do not be afraid of your computer all you need to do is learn that step, how to keep your personal items backed up and then of course how to re-install your computer back to factory and you can always start over with a fresh build.
On to your questions:
Q - What are the steps to ensure that all HP updates are done.
A - Simply review the HP Support document: Using HP Support Assistant (Windows 8) and it will guide you through the process.
Q - What are the steps to ensure that all Windows updates are done?
A - Simply review the Microsoft Support document: Windows Update: Frequently Asked Questions and again you will find answers to this question. (***Note: Do not worry if the document refers to Windows 8.1 it is only an upgraded version of Windows 8 and the steps are the same)
I am also including a Windows Support document: Install the latest Windows 8.1 Update, which will guide you through how to install the Windows 8.1 update on your computer.
And finally, to put your mind at ease I am providing you with two important HP Support documents: Backing Up Your Files (Windows 8), and Performing an HP System Recovery (Windows 8), which will provide you with all the instructions you need to backup your personal files so you do not loose them if you ever do mess up the computer, as well as provide you with instructions on how to put your computer back to how it came from the factory.
Please re-post if you require additional support. Thank you once again for your post on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter
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