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.

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Remote Object - not able to get the returned value from java method

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I am developing one sample flex aplication that connects to the java code and displays the returned value from the
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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 {
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<mx:RemoteObject id="remoteObj" destination="sro" />
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Java code
public
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class SimpleRemoteObject {
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out.println("Name changed in Java");
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And I have configured destination in remote-config.xml
<destination id="sro">
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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.

NEED HELP on returning values from a method

Hello Java World,
Does anyone know how to return more then 1 value from a method..
ex.
//the following returns one value
//Person Class
private String getname()
return this.name;
how can i get two values (ex. name and occupation of person)
Thank you in advance.

Create a Class which will hold the values you want and return that object. Or return a List, or return an array, or - taking your example with the person, why don't you return the whole person object?
Thomas

Capture Return Value from Contextual Events Subscriber Method

Hi
I was wondering if anyone knew whether you could capture the return value from a method exposed as a subscriber for a contextual event?
Requirement: We have 2 bounded task flows (parent-child) with the child task flow embedded as a region in a view activity in the parent task flow. Based on an action in the parent task flow we raise a contextual event which calls an application module method exposed as a data control within the child task flow. We need to be able to capture the return value from the method on the managed bean.
Example method within child task flow application module:
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Return "Y";
So here we would like to capture String value when the event is raised by the event producer (parent task flow action).
Within the Event Map on the page definition of the parent task flow view activity it is possible to set parameters to pass to the subscriber but it’s not obvious where you can capture the return value.
Many thanks!
Technology:
ADF 11.1.1.7 – ADFbc with ADF task flows and page fragments

Check this URL it may help you
One size doesn't fit all: JDev 11g: Programmatic Contextual Events

Returning multiple values from a method

I have to return a string and int array from a method (both are only of size 5 for a total of 10) What would be considered the best manner in which to do this ?
Dr there's 10 points in it for you or whoever gives me the best idea ;-P

hey here it is easy that you can return many things
what ever you want from a single method man....
you know the main thing what you have to do is.....
Just create a VECTOR or LIST object, then add all the
values what ever you want to return like string and
int array like etc...
Then make the method return type is VECTOR and after
getting the Vector you can Iterate that and you can
get all the values from that method what ever you
want....
jus try this,,,,,,,,,,
Its really work......
reply me..but it relies purely on trust that the returned collection would contain exactly the right number and type of arguments

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?
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What 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

How do you return more than one value from a method?

say I have this:
public static int myFunc(String inString)
// I want to return two values from this method
}yeah so how would i do that?

If the two values are somehow related--like a person's name and his age--define a class that has those two values as member variables--for example, Person. But only if that class and the assocation of those two quantities makes sense as an entity in your program. Don't do it just to jam to quantities into one return.
Or, if the two values are two of the same thing--person A's age and person B's age--then you can return an array or Collection.
If it doesn't fit either of those two scenarios, then your method is trying to do too much unrelated stuff and you should break it into multiple methods. For example, calculating a Person's age based on his birthdate and today's date and calculating his Body Mass Index based on his height and weight. Those two quantities should NOT be returned together.

Returning Values from Methods

We ran across some code in one of our classes that calls a private method. That method returns an object, but the code calling that method does not capture it. What happens to the return value in a case like this? I would have thought that to be a syntax error.
Example:
myMethod(myObject, i); // Call to myMethod without capturing its return value.
private myObject myMethod(MyObject myObject, int i) {
return myObject;
}What happens to the return value from myMethod?

(void) f(arg1, ..., argN); There's no
provision in Java to allow you express that same
intention.
What?!?!?public void f(arg1, ...,
argN);
In the C code, function f was defined as having a non-void return type.
The statement
(void) f(arg1, ..., argN);shows the caller is knowing ignoring that returned value.

How to get the return values from a web page

Hi all :
how to get the return values from a web page ? I mean how pass values betwen webflow and web page ?
thank you very much
Edited by: jingying Sony on Apr 15, 2010 6:15 AM
Edited by: jingying Sony on Apr 15, 2010 6:18 AM

Hi,
What kind of web page do you have? Do you have possibility to for example make RFCs? Then you could trigger events (with parameters that could "return" the values) and the workflow could react to those events. For example your task can have terminating events.
Regards,
Karri

How to use return value from TestComplete ( using COM) as a variable in the conditional statement (e.g. while loop) in TestStand

Hi,
I have setup a COM interface for TestStand(TS) to run certain scripts in TestComplete (TC). Normally, when TestComplete finishes executing the script, it returns a 0 or 1 to denote pass/fail in the TestStand step (e.g String value test step). This worked fine.
However, now I need TestComplete to return a vaule( e.g 32) to TS, and TS need to evalue this value in a while statement. So if TC return value is 32, I'd have some statement in TS ike :
While (return value != 30)
Do something..
Thanks,
Solved!
Go to Solution.

There are a hundred ways to implement what you are asking. The hard part is deciding which one would be the best for you.
What adapter are you using to communicate with TestComplete? ActiveX? Is TestComplete running asynchronously (in parallel)? If so then how is the data getting back to TestStand?
So here are some options:
1. You can use the While Step type. It's in the Flow Control folder in your Step Types pallette. Look in your examples under UsingFlowControlSteps.seq in the SequenceFlow
2. You can loop on a step and have the termination for the loop be (return value == 30). Look in the Step Properties under Looping. Also in the TestStand help
3. You could do Post Actions based on a condition and have it jump to another step. Read about it in the TestStand Reference Manual.
4. You could use a GoTo step. I don't really recommend this one. It makes code hard to maintain. Also an example in SequenceFlow called gotobeep.seq.
Hopefully this gets you thinking. Let me know if you have specific questions about any of these methods.
jigg
CTA, CLA
teststandhelp.com
~Will work for kudos and/or BBQ~

How to Sort by the length of the returned value from a query.

Hi,
I was wondering if it is possible to sort by the length of the returned value from a query?
For example if I want to get a list of people with the name 'Samuel', I would like to short by how short the length of the whole name is.
Sort by length of the name in SQL
Samuel Syda
Samuel Indranaka
Samuel Johnsons
Samuel Longhenderson
Thank you.

Hi,
Sorting is done by an ORDER BY clause at the end of the main query.
In most cases, you can ORDER BY any expression, even f it is not in the SELECT clause. In this case, it sounds like you just need:
ORDER BY LENGTH (name_column)
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all the tables involved, and the results you want from that data.
Post your query, using an ORDER BY clause like the one above, and point out where that query is producing the wrong results, and explain, using specific examples, how you get the right results from the given data in those places.
Always say what version of Oracle you're using (e.g. 11.2.0.2.0).
See the forum FAQ: https://forums.oracle.com/message/9362002

How to get return value from java and read by other application?

i want to read return value from java and the other application read it.
for example:
public class test_return {
    test_return(){
    public int check(){
        return 1;
    public static void main(String args[]){
       new test_return().check();
}from that class i make as jar file. How to read the return value (1) by other application?
thx..

If your installer is requiring some process it invokes to return a particular value on failure, then the installer is seriously broken. There are a bazillion commands your installer could invoke, and any of them could fail, which in turn could invalidate the entire install process, and any of them could return any value on failure. The only value that's consistent (in my experience) is that zero means success and non-zero means failure, with specific non-zero values being different in different programs.
About the only control you have over the JVM's exit code is that if your main method completes without throwing an exception, the JVM will have an exit code of 0, and if main throws an exception (either explicitly or by not catching one thrown from below), it will be non-zero. I'm not even sure if that's guaranteed, but I would guess that's the case.
EDIT: I'm kind of full of crap here. If you're writing the Java code, you can call System.exit(whatever). But nonetheless, if your installer requires certain exit codes from any app--java or otherwise--you have a problem.
Edited by: jverd on Oct 29, 2009 1:27 AM

RE: (forte-users) Reading return value from Javaprogram

when using the RunCommand method you can specify the an error file:
task.part.os.RunCommand(command = l_tdCommandLine,
isSynchronous = TRUE,
inputFile = Nil,
outputFile = Nil,
errorFile = l_ErrorFile.GetLocalName(TRUE));
BEGIN
l_ErrorFile.Open(SP_AM_READ);
EXCEPTION
WHEN Ex: FileResourceException DO
l_ErrorFile = NIL;
task.ErrorMgr.Clear();
END;
IF l_ErrorFile <> NIL THEN
l_tdFileContents : TextData = New();
l_ErrorFile.ReadText(l_tdFileContents);
l_ErrorFile.Close();
END IF;
Have you java program output the return value to the standard IO. This way
you will have an error file that you can read from Forte.
ka
-----Original Message-----
From: Anthony D [mailto:saigonxyahoo.com]
Sent: Tuesday, September 12, 2000 7:49 AM
To: forte-userslists.xpedior.com
Subject: (forte-users) Reading return value from Java program
Hi,
Does anyone know whether Forte application can
read a return value from a Java program?
I'm using the RunCmd method to invoke the Java
program. I'd like to read the return value from the
Java program. How do I go about doing it?
Any suggestion will be appriciated.
Thanks
AD
http://mail.yahoo.com/
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

when using the RunCommand method you can specify the an error file:
task.part.os.RunCommand(command = l_tdCommandLine,
isSynchronous = TRUE,
inputFile = Nil,
outputFile = Nil,
errorFile = l_ErrorFile.GetLocalName(TRUE));
BEGIN
l_ErrorFile.Open(SP_AM_READ);
EXCEPTION
WHEN Ex: FileResourceException DO
l_ErrorFile = NIL;
task.ErrorMgr.Clear();
END;
IF l_ErrorFile <> NIL THEN
l_tdFileContents : TextData = New();
l_ErrorFile.ReadText(l_tdFileContents);
l_ErrorFile.Close();
END IF;
Have you java program output the return value to the standard IO. This way
you will have an error file that you can read from Forte.
ka
-----Original Message-----
From: Anthony D [mailto:saigonxyahoo.com]
Sent: Tuesday, September 12, 2000 7:49 AM
To: forte-userslists.xpedior.com
Subject: (forte-users) Reading return value from Java program
Hi,
Does anyone know whether Forte application can
read a return value from a Java program?
I'm using the RunCmd method to invoke the Java
program. I'd like to read the return value from the
Java program. How do I go about doing it?
Any suggestion will be appriciated.
Thanks
AD
http://mail.yahoo.com/
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

How to get return value from Java runtime.getRuntime.exec?

I'm running shell commands from an Oracle db (11gr2) on aix.
But, I would like to get a return value from a shell comand... like you get with "echo $?"
I use a code like
CREATE OR REPLACE JAVA SOURCE NAMED common."Host" AS
import java.io.*;
public class Host {
public static int executeCommand(String command) {
    int retval=0;
    try {
        String[] finalCommand;
        finalCommand = new String[3];
        finalCommand[0] = "/bin/sh";
        finalCommand[1] = "-c";
        finalCommand[2] = command;
      final Process pr = Runtime.getRuntime().exec(finalCommand);
      pr.waitFor();
   catch (Exception ex) {
      System.out.println(ex.getLocalizedMessage());
      retval=-1;
    return retval;
/but I do not get a return value... because I don't know how to get return value..
Edited by: user9158455 on 22-Sep-2010 07:33

Hi,
Have your tried pr.exitValue() ?
I think you also need a finally block that destroys the subprocess
Regards
Peter

I am facing problem while reading values from properties file ...i am getting null pointer exception earlier i was using jdeveloper10g now i am using 11g

i am facing problem while reading values from properties file ...i am getting null pointer exception earlier i was using jdeveloper10g now i am using 11g

hi TimoHahn,
i am getting following exception in JDeveloper(11g release 2) Studio Edition Version 11.1.2.4.0 but it works perfectly fine in JDeveloper 10.1.2.1.0
Root cause of ServletException.
java.lang.NullPointerException
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at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
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at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
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at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
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at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
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The problem of return value from a method

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