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
and invoking that method in form property
but i dont think this is the exact way struts follow , there could be a prcise and direct way to invoke propert methods
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
satya
can 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
Similar Messages
-
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 -
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? -
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. -
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. -
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 -
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.
-
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. -
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 -
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. -
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}" /> -
Util to auto-generate getters and setters...
Does anyone know of a utility that automatically generate getters and setter classes from a list of variable names???
Might stop me getting RSI!i gave up on gets/sets about 2weeks after mylecturer
introduced them to us :/Giving up on gets/sets is a mistake... take it from an
EXPERIENCED programmer.you assume 2 much. Uni was a long time ago 4 me.
>
if a var can be modified, then make it public.Though
adding a get/set method does provide encapsulation,it
also requires more typing, bloats code and is alsoa
fraction slower.Adding get/set methods provide more then just the
encapsulation. It provides you easier debug not to
mention easier way to read the code.Encapsulation encapsulates the idea of ezier debuggin :]
gets/sets do not automatically give you code readability, and badly named gets/sets can detract from readability.
>
Sometimes gets/sets serve a purpose, but most ofthe
time theyre just a waste of time.If you think set/get is a waste of time your attitude
will get you into trouble. Consider code with a full
set of public variables in a 'complex' system (well,
lets just say 1500 classes).ok, you've applied my philosophy to your field, now let me apply yours to mine.
I write games for Java enabled mobile phones(J2ME MIDP1.0), on this platform code size (and memory usage) is a SERIOUS concern.
FYI. the Nokia 6310i mobile phone has approx. 140k of heap, and a jar size limited of 30k.
EVERY line of code has to be optimal, in both space and time,
The cost of gets/sets; inheritance; interfaces and all the other wonderful OO design features of java are serious performance inhibitors, and consequently are used only when absolutly necessary.
>
During development a bug is discovered and you realize
that the bug is due to a change in a specific
variable. How do you, quickly and simply, find out
what classes are changing the variable. It could be
anywhere; but by having a get and set method for that
variable you could add a simple code like "new
Exception().printStackTrace();" into the set method
and get a trace when the bug happens. This way you
would know within secondes what object is changing the
variable making the debugging easy. don't write buggy code ;] (that was a j/k btw)
btw, im curious how exactly do u realise that the bug is related to a specific variable? gets/sets help debugging, but they are not the magic bullet of debugging techniques.
>
What if you would like to override a class and to
something before or after a variable is manipulated?
This would be impossible if all variables are public.
You will loose all control of you code.you are still argueing a different point to me - the abstraction of gets/sets do serve a purpose, however they also impose a cost.
>
There are many more reasons for adding the get/set
methods but it will take me all day to write them all
here.
I say: "have all variables protected, GET OFF YOUR
ASS, and add the 200 lines of code" if not for you
then for the one that later will be using or fixing
the code.
Its quite funny watching a newbie programmer start
writing a class, they identify the classes required
attributes, then write 200lines of gets and sets
before they even consider tackling the 'hard'bit[s]
of the class :]What do think of code guidlines that are forced by
most software companies? This is more important then
most NEWBIES think; wait a few years and you will get
the point..
my point here, is that training programmers to follow guidelines before you have taught them the fundamentals of problem solving is futile.
What about comments? Do you find them funny and
useless? hope you don't...for your sake.no, all good code should be commented. But I have to admit, I don't waste time commenting code as i write it, i find it slows down my coding. However I will always go back and comment any code if it is to be used by some1 else.
>
Thinking it funny that people take the time and effort
to make their code more readable, understandable,
accessable, flexible and over all more pretty makes
you the newbie.hmm, unprovoked flaming - now whos the newbie :/
>
It scares me to think that the new breed of
programmers will think it funny to write GOOD code.
bopen, bwise, bbetter...
What frustrates me, is why good design always means slower performance.
It shouldn't, and until Java progresses to the point where the runtime cost of good design is not significant, I will still regard Java as a primitive language. -
How to know form name and tcode
Hi,
I know the driver program for layout is PPPRZUGL. How can i come to know the form name and its associated Tcode to see the output.
Can anybody tell me ?
Thankshi,
Go to se11 and select the database table TNAPR .Enter the program name for it in Program name and get the corresponding records from which you can know the form configured for it.This table is used for SD-MM configurations only.Program PPPRZUGL is related to PP module .CO03 is the transaction for getting the production orders.
Regards,
Veeresh
Edited by: veereshbabu ponnada on May 6, 2008 11:02 AM -
Help!!!How to run Form Builder and Forms Runtime together?
Dear Friends,
I am new to Oracle Developement and need your help.
Everytime I click the RUN icon to run a form from the Form Builder, the Forms Runtime starts, however, closes my Form Builder the same time. After I closed the Forms Runtime, the Form Builder shows up as before.
In another word, I cannot have both Forms Runtime and Forms Builder at the same time. How can I run the form without closing the Form Builder so that it's eaiser to modify the form and time saving?
Thank you very much.Thanks. But I cannot make by using alt+tab. I know it is strange.
I could do that before but I don't know what's wrong with it now because start of the Runtime automatically hide the Form Builder until I close the runtime. Does anyone have any idea or same experience of this? Any suggestion?
null -
How to invoke BASH shell and execute a command in that shell in Windows 98
Hello, I have a problem and if somebody will help me, I will be very glad. Thank you.
I am using BASH shell on Windows 98 OS by means of CYGWIN. And I want to invoke this BASH shell and execute a preprogrammed command in the shell (./scan fileName.txt) from a JAVA program. But so far, I am not sucessful. I can not read or write anything from / to BASH shell. It either blocks and freezes (When I use waitFor( ) ) or appears and disappears without executing scan command (When I do not use waitFor( ) ). My code is like this:
// This method is used for compiling a file.
// It invokes BASH shell and executes "./scan fileName.txt" command
public void compileFileMethod () {
try {
Process proc = ( Runtime.getRuntime() ).exec ("C:\\MyDocuments\\CYGWIN.BAT); //I also tried to add -c ./scan fileName.txt after .BAT );
// I also tried to write "C:\\MyDocuments\\BASH.EXE" but it did not help
OutputStream ostr = proc.getOutputStream();
BufferedWriter bw = new BufferedWriter ( new OutputStreamWriter (ostr) );
InputStream istr = proc.getInputStream();
BufferedReader br = new BufferedReader ( new InputStreamReader (istr) );
InputStream errorStr = proc.getErrorStream();
BufferedReader errorBr = new BufferedReader ( new InputStreamReader (errorStr) );
bw.write("scan case40.10.txt"); /* I am trying to input the scan command to the shell,but it is not working*/
bw.flush();
Vector list = new Vector (1) ;
String str;
while ( (str = br.readLine() ) != null) {
list.addElement(str);
} // End of while
Enumeration enumForList = list.elements();
while ( enumForList.hasMoreElements() ) {
String tempString;
tempString = ( String ) enumForList.nextElement();
System.out.println(tempString); // I am trying to read the outputs of the scan command but it is not reading (I can not see any output)
I tried with and without waitFor( ), it did not work
// wait for command to terminate
proc.waitFor();
// close streams
br.close();
bw.close();
errorBr.close();
} // End of try
catch ( IOException ioe ) {
JOptionPane.showMessageDialog (null, "Input / output error occured while compiling file ", "Error", JOptionPane.ERROR_MESSAGE);
} // End of catch
catch ( SecurityException se ) {
JOptionPane.showMessageDialog (null, "Security error occured while compiling file ", "Error", JOptionPane.ERROR_MESSAGE);
catch ( InterruptedException ie ) {
JOptionPane.showMessageDialog (null, "Interruption error occured while compiling file ", "Error", JOptionPane.ERROR_MESSAGE);
} // End of method compileFileMethod
// Thank you for your helps and time.You cannot invoke BAT files directly, you have to invoke the program that run those files which is your Windows 98 shell. For example (under windows 2000), i would invoke "cmd.exe sricpt.bat some args", rather than "script.bar some args".
Hope this will help you out.
Maybe you are looking for
-
Hi Gurus, I have to display payroll report ( With PNP logical data base ), where in I have to compare indicator 'P' & 'A' records of each personal number for given period. sample code & useful links will be rewarded with points. Thanks, U.S.Raj
-
Hello all, I have just bought an iphone and am trying to set up the two accounts to receive emails on my phone. I have downloaded icloud for the pc and have successfully uploaded all information to my icloud, and this is now reflected on the phone sh
-
LabView Crashing and compile server error.
Hi, I'm having some errors when I compile code for my FPGA (PXI-7831R). I am using LabView 8.2.1. Sometimes labView crashes completely and sometimes it comes up with a compile server error. My code contains 3 VI's. The first send sends digital output
-
Use 2nd Mac as Airtunes Speaker
Hi. Anyone know whether/how I can use a second Mac (mini) as an Airtunes speaker, rather than buying another airport express and speaker setup? Tks
-
Opera 9.64 browser download for Mac OSX 1..3.9
Does anyone have any experience to share on downloading and using Opera 9.64 browser on an iMac OSX using 10.3.9? Specifically, did you use the "universal binary" download? Thanks