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.

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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 AM

DeafBox 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?

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,
public Blah[] getStuff() { ... };Array accessors are always dangerous in Java, since they're necessarily mutable; if you don't want mutating, you have to clone the array every time you return it. Lists are preferable in this regard. OTOH, Lists aren't at all typesafe.
-- Adam Winer

Duplicate getters and setters

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;
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Also, you may have problems with the Bluetooth adapter you purchased, as the only one officially supported by Apple for use with Macs is the D-Link DBT-120.
The Official Apple list of iSync compatible devices is here:
http://www.apple.com/macosx/features/isync/devices.html
It's always a good idea to check this list before purchasing a new phone.
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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.

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.
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Maybe Java tools could at least provide official tools to support Lombok, because it currently uses unsupported interfaces to do its work.
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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.

[svn:osmf:] 10676: Removing JavaScript getters and setters: Wei found out that these are not supported by Internet Explorer.

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.as

Hello 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

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// ActionScript
private var _myProperty:uint;
public function get myProperty():uint
return _myProperty;
public function set myProperty(value:uint):void
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// Java
private Integer myProperty;
public Integer getMyProperty():
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Do you need getters and setters for C types?

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