Getters Methods - Exporting vs Returning value()
Hi OO Gurus,
i'm doing a test oo report. On its first version, i declared all data objects in the public section of all classes. Now, i moved all data objects to the private sections for encapsulation purposes. Therefore, i have to implement get methods for everything declared (including tables and references) in the report. My question is:
What is the best option to create get methods: Create simple methods using the "Exporting" keyword or create functional methods using "Returning value" keywords?
If i use 'exporting', i'm just able to call the method using 'call method' keywords. However formal parameter may not be fully specified (i can export tables in such method)
If i use 'returning value', i have a functional method but its parameters must be fully specified.
What's is the best option in your opinion?
Thanks!
In my opinion functional method is better choice, for the following reasons:
- can be used inline (i.e. as an operand of IF...ENDIF block)
- you don't have to worry about initializing returning parameters, this is done in each method call. For exporting parameter you have to be very carefull, as they might be already passed to the method with some data in them. Althought it not recommended, it is doable, so before you call such method you have to pay atention to that.
If i use 'exporting', i'm just able to call the method using 'call method' keywords.
This is untrue. You can call it like
ref->method( exporting ....
changing .... ).
So the same way as you would call functional method, but you MUST determine whether is exporting/changing/imporitng parameter unless there are only importing parameters. In this case you can even skip the input/output signature.
If i use 'returning value', i have a functional method but its parameters must be fully specified.
Not sure now, but I think you could pass reference to data object (type ref to DATA) and deference it outside the method typing it respectively. I cannot however confirm this right now (no access to system) so here I may mistake. Try it out though.
Regards
Marcin
Similar Messages
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Exporting and returning value question
What is different between exporting and returning value in method of a class. if created an object inside the method and exporting it, it means I have a reference to that object inside program. If I use returning value, it means I have a copy of object created inside the method, but the object inside method is destroyed after it ends. Do I understand correctly? if so what do u prefer exporting or returning value? thanks!
Hello Anthony
The major difference is that you can have multiple EXPORTING parameters yet only a single RETURNING parameter. In addition, if you have a RETURNING parameter you cannot have EXPORTING parameters simultaneously.
Defining methods with a single RETURNING parameter is more Java-like than having multiple EXPORTING parameters.
Whenever possible and sensible I prefer RETURNING parameters over EXPORTING parameters because they allow to use the function method call, e.g.:
go_msglist = cf_reca_messagelist_create( ).
Regards
Uwe -
Can "main" method return values
Hi,
I have a requirement of returning values to the
command prompt from the main method. Is this possible
to do in the first place. Is it valid.
i.e. Can you do the following in Java,
=======================================
import java.io.*;
import java.lang.Object;
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Can "main" method in Java return values at command
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Can you have something like,
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Help urgently needed as I need to pipe data from a
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Thank,sHi jchak,
Yes I am trying to pass a Java String to a C++
application. Any insights, any help.
OK the whole thing goes as follows,
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Theres a C++ application which first starts up.
This app is then supposed to invoke a Java class file
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Is there some way by means of which Java can return
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JAtin -
How to trap null return values from getters when using Method.invoke()?
Hi,
I am using Method.invoke() to access getters in an Object. I need to know which getters return a value and which return null. However, irrespective of the actual return value, I am always getting non-null return value when using Method.invoke().
Unfortunately, the API documentation of Method.invoke() does not specify how it treats null return values.
Can someone help?
ThanksWhat do you get as a result?I think I know what the problem is.
I tested this using following and it worked fine:
public class TestMethodInvoke {
public String getName() {
return null;
public static void main(String args[]) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
Object o = new TestMethodInvoke();
Class cls = o.getClass();
Method m = cls.getMethod("getName", (Class[]) null);
Object result = m.invoke(o, (Object[])null);
if (result == null) {
System.err.println("OK: Return value was null as expected");
else {
System.err.println("FAILED: Return value was NOT null as expected");
However, when I use the same technique with an EJB 3.0 Entity class, the null return value is not returned. Instead, I get a String() object. Clearly, the problem is the the EJB 3.0 implementation (Glassfish/Toplink) which is manipulating the getters.
Regards
Dibyendu -
Getter/setter methods -- how do I use the return values
I'm just learning Java, and I haven't been to this site since the end of July, I think. I have a question regarding getter and setter methods. I switched to the book Head First Java after a poster here recommended it. I'm only about a hundred pages into the book, so the code I'm submitting here reflects that. It's the beginnings of a program I'd eventually like to complete that will take the entered information of my CD's and alphabetize them according to whatever criteria I (or any user for that matter) choose. I realize that this is just the very beginning, and I don't expect to have the complete program completed any time soon -- it's my long term goal, but I thought I could take what I'm learning in the book and put it to practical use as I go along (or at lest try to).
Yes I could have this already done it Excel, but where's the fun and challenge in that? :) Here's the code:
// This program allows the user to enter CD information - Artist name, album title, and year of release -- and then organizes it according the the user's choice according to the user's criteria -- either by artist name, then title, then year of release, or by any other order according to the user's choice.
//First, the class CDList is created, along with the necessary variables.
class CDList{
private String artistName;//only one string for the artist name -- including spaces.
private String albumTitle;//only one string the title name -- including spaces.
private int yearOfRelease;
private String recordLabel;
public void setArtistName(String artist){
artistName = artist;
public void setAlbumTitle(String album){
albumTitle = album;
public void setYearOfRelease(int yor){
yearOfRelease = yor;
public void setLabel(String label){
recordLabel = label;
public String getArtistName(){
return artistName;
public String getAlbumTitle(){
return albumTitle;
public int getYearOfRelease(){
return yearOfRelease;
public String getLabel(){
return recordLabel;
void printout () {
System.out.println ("Artist Name: " + getArtistName());
System.out.println ("Album Title: " + getAlbumTitle());
System.out.println ("Year of Release: " + getYearOfRelease());
System.out.println ("Record Label: " + getLabel());
System.out.println ();
import static java.lang.System.out;
import java.util.Scanner;
class CDListTestDrive {
public static void main( String[] args ) {
Scanner s=new Scanner(System.in);
CDList[] Record = new CDList[4];
int x=0;
while (x<4) {
Record[x]=new CDList();
out.println ("Artist Name: ");
String artist = s.nextLine();
Record[x].setArtistName(artist);
out.println ("Album Title: ");
String album = s.nextLine();
Record[x].setAlbumTitle(album);
out.println ("Year of Release: ");
int yor= s.nextInt();
s.nextLine();
Record[x].setYearOfRelease(yor);
out.println ("Record Label: ");
String label = s.nextLine();
Record[x].setLabel(label);
System.out.println();
x=x+1;//moves to next CDList object;
x=0;
while (x<4) {
Record[x].getArtistName();
Record[x].getAlbumTitle();
Record[x].getYearOfRelease();
Record[x].getLabel();
Record[x].printout();
x=x+1;
out.println("Enter a Record Number: ");
x=s.nextInt();
x=x-1;
Record[x].getArtistName();
Record[x].getAlbumTitle();
Record[x].getYearOfRelease();
Record[x].getLabel();
Record[x].printout();
}//end main
}//end class First, I'd like to ask anyone out there to see if I could have written this any more efficiently, with the understanding that I'm only one hundred pages into the book, and I've only gotten as far as getter and setter methods, instance variables, objects and methods. The scanner feature I got from another book, but I abandoned it in favor of HFJ.
Secondly --
I'm confused about getter and setter methods -- I'd like someone to explain to me what they are used for exactly and the difference between the two. I have a general idea, that getters get a result from the method and setters set or maybe assign a value to variable. I submitted this code on another site, and one of the responders told me I wasn't using the returned values from the getter methods (he also told me about using a constructor method, but I haven't got that far in the book yet.). The program compiles and runs fine, but I can't seem to figure out how I'm not using the returned values from the getter methods. Please help and if you can explain in 'beginners terms,' with any code examples you think are appropriate. It will be greatly appreciated.
By the way, I'm not a professional programmer -- I'm learning Java because of the intellectual exercise and the fun of it. So please keep that in mind as well.
Edited by: Straitsfan on Sep 29, 2009 2:03 PMStraitsfan wrote:
First, I'd like to ask anyone out there to see if I could have written this any more efficiently, with the understanding that I'm only one hundred pages into the book, and I've only gotten as far as getter and setter methods, instance variables, objects and methods. The scanner feature I got from another book, but I abandoned it in favor of HFJ.Yes, there is tons you could have done more efficiently. But this is something every new programmer goes through, and I will not spoil the fun. You see, in 3 to 6 months when you have learned much more Java, assuming you stick with it, you will look back at this and be like "what the hell was I thinking" and then realize just haw far you have come. So enjoy that moment and don't spoil it now by asking for what could have been better/ more efficient. If it works it works, just be happy it works.
Straitsfan wrote:
Secondly --
I'm confused about getter and setter methods -- I'd like someone to explain to me what they are used for exactly and the difference between the two. I have a general idea, that getters get a result from the method and setters set or maybe assign a value to variable. I submitted this code on another site, and one of the responders told me I wasn't using the returned values from the getter methods (he also told me about using a constructor method, but I haven't got that far in the book yet.). The program compiles and runs fine, but I can't seem to figure out how I'm not using the returned values from the getter methods. Please help and if you can explain in 'beginners terms,' with any code examples you think are appropriate. It will be greatly appreciated.
By the way, I'm not a professional programmer -- I'm learning Java because of the intellectual exercise and the fun of it. So please keep that in mind as well.First, if you posted this somewhere else you should link to that post, it is good you at least said you did, but doubleposting is considered very rude because what inevitably happens in many cases is the responses are weighed against each other. So you are basically setting anyone up who responds to the post for a trap that could make them look bad when you double post.
You are setting you getters and setters up right as far as I can tell. Which tells me that I think you grasp that a getter lets another class get the variables data, and a setter lets another class set the data. One thing, be sure to use the full variable name so you should have setRecordLabel() and getRecodLabel() as opposed to setLabel() and getLabel(). Think about what happens if you go back and add a label field to the CDList class, bad things the way you have it currently. Sometimes shortcuts are not your friend.
And yes, you are using the getters all wrong since you are not saving off what they return, frankly I am suprised it compiles. It works because you don't really need to use the getters where you have them since the CDList Record (should be lowercase R by the way) object already knows the data and uses it in the printout() method. Basically what you are doing in lines like:
Record[x].getArtistName();is asking for the ArtistName in Record[x] and then getting the name and just dropping it on the floor. You need to store it in something if you want to keep it, like:
String artistName = Record[x].getArtistName();See how that works?
Hope this helped, keep up the good learning and good luck.
JSG -
Remote Object - not able to get the returned value from java method
Hi ,
I am developing one sample flex aplication that connects to the java code and displays the returned value from the
java method in flex client. Here I am able to invoke the java method but not able to collect the returned value.
lastResult is giving null . I am able to see the sysout messages in server console.
I am using flex 3.2 and blazeds server and java 1.5
Here is the code what I have written.
<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundColor="#FFFFFF" initialize="initApp()">
<mx:Script><![CDATA[
import mx.controls.Alert;
import mx.binding.utils.ChangeWatcher;
import mx.rpc.events.ResultEvent;
import mx.messaging.*;
import mx.messaging.channels.*
public function initApp():void {
var cs:ChannelSet = new ChannelSet();
var customChannel:Channel = new AMFChannel("my-amf", "http://localhost:8400/blazeds/messagebroker/amf"); cs.addChannel(customChannel);
remoteObj.channelSet = cs;
public function writeToConsole():void { remoteObj.writeToConsole(
"hello from Flash client");
var returnedVal:String = remoteObj.setName().lastResult; Alert.show(returnedVal);
//[Bindable]
// private var returnedVal:String;
]]>
</mx:Script>
<mx:RemoteObject id="remoteObj" destination="sro" />
<mx:Form width="437" height="281">
<mx:FormItem>
</mx:FormItem>
<mx:Button label="Write To Server Console" click="writeToConsole()"/>
</mx:Form>
</mx:WindowedApplication>
Java code
public
public SimpleRemoteObject(){
super(); }
class SimpleRemoteObject {
public void writeToConsole(String msg) { System.out.println("SimpleRemoteObject.write: " + msg); }
public String setName(){ System.
out.println("Name changed in Java");
return "Name changed in Java";
And I have configured destination in remote-config.xml
<destination id="sro">
<properties>
<source>SimpleRemoteObject</source>
<scope>application</scope>
</properties>
</destination>
Please help me .You are not able to get the returned value because if you see the Remote object help you will realise you have to use result="resultfn()" and fault = "faultfn()"
In this you define what you wish to do.
More importantly in the remote object you need to define which method you wish to call using the method class like this
<mx:RemoteObject id="remoteObj" destination="sro" result="r1" fault="f1" >
<Method name="javaMethodName" result="r2" fault="f2"/>
<mx:RemoteObject>
r2 is the function where you get the result back from java and can use it to send the alert. -
How to know that a method has been called and returning value of a method
Hi, everyone! I have two questions. One is about making judgment about whether a method has been called or not; another one is about how to return "String value+newline character+String value" with a return statement.
Here are the two original problems that I tried to solve.
Write a class definition of a class named 'Value' with the following:
a boolean instance variable named 'modified', initialized to false
an integer instance variable named 'val'
a constructor accepting a single paramter whose value is assigned to the instance variable 'val'
a method 'getVal' that returns the current value of the instance variable 'val'
a method 'setVal' that accepts a single parameter, assigns its value to 'val', and sets the 'modified' instance variable to true, and
a boolean method, 'wasModified' that returns true if setVal was ever called.
And I wrote my code this way:
public class Value
boolean modified=false;
int val;
public Value(int x)
{val=x;}
public int getVal()
{return val;}
public void setVal(int y)
val = y;
modified = true;
public boolean wasModified()
if(val==y&&modified==true)
return true;
}I tried to let the "wasModified" method know that the "setVal" has been called by writing:
if(val==y&&modified==true)
or
if(x.setVal(y))
I supposed that only when the "setVal" is called, the "modified" variable will be true(it's false by default) and val=y, don't either of this two conditions can prove that the method "setVal" has been called?
I also have some questions about the feedback I got
class Value is public, should be declared in a file named Value.java
public class Value
cannot find symbol
symbol : variable y
location: class Value
if(val==y&&modified==true)
*^*
*2 errors*
I gave the class a name Value, doesn't that mean the class has been declared in a file named Value.java*?
I have declared the variable y, why the compiler cann't find it? is it because y has been out of scale?
The other problem is:
Write a class named Book containing:
Two instance variables named title and author of type String.
A constructor that accepts two String parameters. The value of the first is used to initialize the value of title and the value of the second is used to initialize author .
A method named toString that accepts no parameters. toString returns a String consisting of the value of title , followed by a newline character, followed by the value of author .
And this is my response:
public class Book
String title;
String author;
public Book(String x, String y)
{ title=x; author=y; }
public String toString()
{return title;
return author;
}I want to know that is it ok to have two return statements in a single method? Because when I add the return author; to the method toString, the compiler returns a complain which says it's an unreachable statement.
Thank you very much!Lets take this slow and easy. First of all, you need to learn how to format your code for readability. Read and take to heart
{color:0000ff}http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html{color}
Now as to your first exercise, most of it is OK but not this: public boolean wasModified()
if (val == y && modified == true)
return true;
y being a parmeter to the setValue method exists only within the scope of that method. And why would you want to test that anyways? If modified evaluates to true, that's all you need to know that the value has been modified. So you could have public boolean wasModified()
if (modified == true)
return true;
}But even that is unnecessarily verbose, as the if condition evaluates to true, and the same is returned. So in the final analysis, all you need is public boolean wasModified()
return modified;
}And a public class has to be declared in a file named for the class, yes.
As for your second assignment, NO you cannot "return" two variables fom a method. return means just that: when the return statement is encountered, control returns to the calling routine. That's why the compiler is complaining that the statement following the (first) return statement is unreachable.
Do you know how to string Strings together? (it's called concatenation.) And how to represent a newline in a String literal?
db -
Call C# method from javascript in WebView and retrieve the return value
The issue I am facing is the following :
I want to call a C# method from the javascript in my WebView and get the result of this call in my javascript.
In an WPF Desktop application, it would not be an issue because a WebBrowser
(the equivalent of a webView) has a property ObjectForScripting to which we can assign a C# object containg the methods we want to call from the javascript.
In an Windows Store Application, it is slightly different because the WebView
only contains an event ScriptNotify to which we can subscribe like in the example below :
void MainPage_Loaded(object sender, RoutedEventArgs e)
this.webView.ScriptNotify += webView_ScriptNotify;
When the event ScriptNotify is raised by calling window.external.notify(parameter), the method webView_ScriptNotify is called with the parameter sent by the javascript :
function CallCSharp() {
var returnValue;
window.external.notify(parameter);
return returnValue;
private async void webView_ScriptNotify(object sender, NotifyEventArgs e)
var parameter = e.Value;
var result = DoSomerthing(parameter);
The issue is that the javascript only raise the event and doesn't wait for a return value or even for the end of the execution of webView_ScriptNotify().
A solution to this issue would be call a javascript function from the webView_ScriptNotify() to store the return value in a variable in the javascript and retrieve it after.
private async void webView_ScriptNotify(object sender, NotifyEventArgs e)
var parameter = e.Value;
var result = ReturnResult();
await this.webView.InvokeScriptAsync("CSharpCallResult", new string[] { result });
var result;
function CallCSharp() {
window.external.notify(parameter);
return result;
function CSharpCallResult(parameter){
result = parameter;
However this does not work correctly because the call to the CSharpResult function from the C# happens after the javascript has finished to execute the CallCSharp function. Indeed the
window.external.notify does not wait for the C# to finish to execute.
Do you have any solution to solve this issue ? It is quite strange that in a Window Store App it is not possible to get the return value of a call to a C# method from the javascript whereas it is not an issue in a WPF application.I am not very familiar with the completion pattern and I could not find many things about it on Google, what is the principle? Unfortunately your solution of splitting my JS function does not work in my case. In my example my CallCSharp
function is called by another function which provides the parameter and needs the return value to directly use it. This function which called
CallCSharp will always execute before an InvokeScriptAsync call a second function. Furthermore, the content of my WebView is used in a cross platforms context so actually my
CallCSharp function more look like the code below.
function CallCSharp() {
if (isAndroid()) {
//mechanism to call C# method from js in Android
//return the result of call to C# method
} else if (isWindowsStoreApp()) {
window.external.notify(parameter);
// should return the result of call to C# method
} else {
In android, the mechanism in the webView allows to return the value of the call to a C# method, in a WPF application also. But I can't figure why for a Windows Store App we don't have this possibility. -
How to map AM method return values in the bean
Hello -
I have this requirement to map AM method return values in the bean as explained below. Please suggest a solution.
Scenario: I am calling an AM method, which returns a String object on page load.
AMImpl Method-
public String getProfileName (){
return "Profile";
I wish to catch this retun value in the Bean Variable on page Load. I have created a methodAction biding on page and invokeAction to call this method on Page Load, but I don't know how to catch this value in the bean. Please suggest how to achieve this. Also, I need to achieve this in jsp page. I can't use TaskFlow for this.
I am using ADF 11g.
Regards -
Rohit
Edited by: Rohit Makkad on Apr 21, 2010 12:23 AMHi, I think there are two ways, from the data control drag n drop the methods return value to the page. This way a binding for that will be created at the page definition eg retVal.
and in the backing bean you can access it by calling resolveExpression("#{bindings.retVal.inputValue}")
You can also call your method directly from the backbean
((YourAppModuleImpl) getBindings().getDataControl().getApplicationModule()).yourMethod();
public DCBindingContainer getBindings() {
return (DCBindingContainer) resolveExpression("#{bindings}");
I dont know if the second method suits you
Tilemahos -
The problem of return value from a method
Hi everyone:
I want return a value from following method. The basic idea is that I want use Num as a parameter to get a value from a field, therefore I can input this value into another database for the display purpose by using other classes. However I got error message when I compiled it.
"method does not return a value"
I know it is a problem, but how I can fix it? I need your help. Thanks in advance.
Dawei
Method:
public int Read(int Num) {
try{
String qr1 = "select Record form Buffer where Record="+Num+"";
ResultSet rs = statement.executeQuery(qr1);
while (!rs.next()){
int result=rs.getInt(1);
return(result);
catch (SQLException e){
System.err.println("Error in inserting into database " + e);
System.exit(1);
return 1;"select Record form Buffer ...Hopefully "form" is actually "from" in your code.
You have three points of exit from your routine, and only two return value statements.
1 -Return inside the while loop has a value.
2- Return inside the exception block (not sure that '1' would be a valid number)
3- The very end of the method, just before the last '}' does not have a return statement.
By the way, this question has nothing to do with JDBC, so another forum might be a better place to post it. -
Getting return value of a method in an interface
Hello! I have a problem. I have an interface called I. One of the declared method in this interface is M. And I have a class called C. Class C declares Interface I. I want to get the return value of the method M. I used invoke method. M.invoke(anInstance, arg[]). You can't take the instance of interfaces or abstract classes. If I use a class instead of instance for anInstance variable, i get "java.lang.IllegalArgumentException: object is not an instance of declaring class" error. If I use an instance, i get "java.lang.IllegalAccessException: Can not call newInstance() on the Class for java.lang.Class" error. This is because of getting an instance of an interface. if you can help me. i will be greatfully happy.
Thanks for the feedback Tom although you should rethink what you said.
I did not trash your suggestion, nor did I make any reference to it.
Perhaps you should read the OP to see where you went wrong.
OP wants to know return type of Interface's methodNo, the OP wants to obtain the return value.
AND OP knows that instantiation won't work.He was trying to instantiate an Interface, which is not possible. In order for him invoke a Method he needs a concrete implementation. I was simply pointing out what he needs to do in order to acheive his aim.
b) there may be no known implementing classes at
runtimeIf there is no implementing class provided then he will not be able to invoke a method on its instance.
c) even if there were such a class, instantiating it
may have unwanted side effects, takes unnecessary
timeWhy is that a problem? One reason for invoking M is to see what happens.
the class may have N methods while the interface
has only one, so you might look for the correct method
too longIf you bothered to study the code I supplied I obtain a Method from the Interface class so there is no problem in "looking" for a method, besides which there can be exactly 1 method with a given signature in any class so there is no searching involved.
On a personal note, such negative replies are neither helpful to the OP and can cause a credibility problem caused by being labelled a Troll. -
Revision: 4059
Author: [email protected]
Date: 2008-11-10 11:56:38 -0800 (Mon, 10 Nov 2008)
Log Message:
The measure() and updateDisplayList() methods of TextBox and TextGraphic now return early if the inheritingStyles and nonInheritingStyles proto chains haven't been initialized, to avoid RTEs in the compose() method from invalid styles values.
QE Notes: None
Doc Notes: None
Bugs: SDK-17975
Reviewer: Jason
Ticket Links:
http://bugs.adobe.com/jira/browse/SDK-17975
Modified Paths:
flex/sdk/trunk/frameworks/projects/flex4/src/mx/graphics/TextBox.as
flex/sdk/trunk/frameworks/projects/flex4/src/mx/graphics/TextGraphic.as
flex/sdk/trunk/frameworks/projects/flex4/src/mx/graphics/graphicsClasses/TextGraphicEleme nt.asFYI - This regression has been filed here: http://bugs.adobe.com/jira/browse/SDK-31989
-
How do I get (in c) a method return value from the java side?
I have a class in the Java side, that I pass as object to the c side.
in the Java class I have the following method:
public String getPgmId()
return pgmId;
where pgmId is a private string.
I nees to get the value of pgmId, hopefully by using the getPgmId method.
what I have until now is:
JNIEXPORT jint JNICALL Java_JavaAPI_StartProgram (JNIEnv *env, jobject obj, jobject obj2)
jmethodID methID;
jstring jstr;
const char *str;
/* Get a reference to obj2 class */
jclass cls = (*env)->GetObjectClass (env, obj2);
if (cls == NULL){
return;
methID = (*env)->GetMethodID (env, cls, "getPgmId", "()Ljava/lang/String;");
}//StartProgram
my question is how from this point, can I get the return value of the method getPgmId().
tnxjString CallStringMethod(env, obj2, methID);
-
How to pass a value to a BC4J method from JSP/ADF and get a return value.
How i can access and application module method from my jsp using JSTL passing a value and hope a return value from BC4J method already exposed using interfase and droped from data control to my jsp page
Any suggestions ?
Mensaje editado por:
mr2kHi,
Check the size of that Window in which you are displaying this Text of 130 characters.
May be it is less
in that case split that string into 2 strings and pass the two strings from ITCSY structure to script and use.
reward if useful
regards,
ANJI -
How to get the return value of a method
hi there
here is the code i write a method
public void time(int x,int y){
int xx;
int yy;
xx++;
yy++;
x=xx;
y=yy;
i want to use the return value of x and y at another place,who can tell if it is possible. thank u very muchYou declare the return type of the method, and then use the return keyword to return a value which you can assign to a variable.
As the other respondent said, you cannot return more than one value from a function. If you need to return two related values, you may want to enclose them in a class and return an instance of that class. For instance:
class TimeValue {
final int x;
final int y;
public TimeValue(int x, int y) {
this.x = x;
this.y = y;
}Then your method could create a new TimeValues and return it:
public TimeValue time(int x,int y){
int xx = x;
int yy = y;
++xx;
++yy;
return new TimeValue(xx, yy);
}
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