Local variable hides a field

hi everyone ,
i am creating a button but it will show that local variable hides a field . this not an error or warning
JRadioButton a1Btn = new JRadioButton("Physical connectivity");
a1Btn.addActionListener(this) ;here a1Btn shows local variable hides a field.

Correct, it is not an error to have a local variable with the same name as a field of the class.
IDE's such as Eclipse often have options that will flag such name shadowing as a warning, so you'll know when you accidentally do this.
But note that you can always access the class's field by prepending "this.", for example, "this.a1Btn".

Similar Messages

Cannot insert field or paste in existing Local Variable (container of booleans)

Cannot insert field or paste in existing Local Variable (container of booleans)... TestStand 4.1.
This is very strange, especially since I have done it before.
The "paste" and "insert field" selections are greyed out and disabled from the right-click menu. I have tried everything I could imagine, and searched various combinations of posts. I am sure it is something redicoulously simple, bu I cannot find the redicule to solve this annoying issue.
The local variable is a container of booleans. It has 90 elements and I need to add one more. I cannot edit / rename or do anything with this Local. Must be karma (for thos who know me in the LabVIEW forum). Usually, you right click, insert field and it's there.. Not this one..
Has anyone seen this before? Closing and re-opening TestStand did not change anything. There is a matching cluster in LabVIEW which feeds the local in TestStand.
It is a container of custm data type. The Edit Flags are ok (edit is allowed). Can't think of any other valuable info..
Solved!
Go to Solution.

I should correct an erratum in my original post..
Since I am not the original author of the code, I am not sure it is a custom container. As a matter of fact, I don't think it is.
It does not appear in the custom data types. So it must be a Local.
I will attempt to clarify what I am dealing with... (TestStand 4.1)
Maybe pictures are worth thousands of words.
As with typical TestStand projects, there are various variables: Locals, Parameters, FileGlobals, etc.. Nothing odd here.
The one I am concerned about is the Options_Present which is a container of booleans.
I am sure I have edited this one before. Although I seem to recall that it was automatic after changing the cluster in LabVIEW.
Within the Locals, the 2 that are underligned in red do not allow to edit anything (change name, add, delete, paste).
Trying to Insert Field or paste are not possible.
Attachments:
Variables.PNG ‏8 KB
Locals.PNG ‏28 KB
cannotInsert.PNG ‏9 KB

Thread Identification from Field/Local Variable

Hello,
If i have a code that executes multiple threads , can i identify which thread is operating on a certain field ?
Thanx

Watchpoint events contain the thread that accessed the field.
See
[http://java.sun.com/javase/6/docs/jdk/api/jpda/jdi/com/sun/jdi/request/EventRequestManager.html#createAccessWatchpointRequest(com.sun.jdi.Field)]
[http://java.sun.com/javase/6/docs/jdk/api/jpda/jdi/com/sun/jdi/event/AccessWatchpointEvent.html]
However, JDI does not support watchpoints on local variables.

How to hide the field from the view in the webdynpro application?

Hi Gurus,
I got a requirement where in which ,default layout has the field name Time.......To......... which is (2 input box ) and one lable assigned to the container.........
Now my requirement is to hide this field from the layout for all cases of leave......(all types of leave)....
I got a few inputs from forum that we can achieve this by implementing the following steps..........
Create In context => Value attribute => Say Visibility
Go to its properties
Select com.sap.ide.webdynpro.uielementdefinitions.Visibility
In View Layout
Select UI Element Set Visible property to this context variable Visibility.
In wdDoModifyView() You can set this property to false
wdContext.currentContextElement().setVisibility(false);
Can you people tell me where to create the value attribute........
In the view context or in the component context...........
and field that am talking about is assign to the container you want me to assign this context variable property to all ......Like to input box ,label and the container..........
Please calrify this ASAP...........
Thanks in Advance,
Dharani

Hi Manoj......
Hi Murutuza,
As per your guidelines I have created the value attribute in View context (which has the field..... which needs to be hide)inside the value node say FieldVisibility.......and attribute name OldTimeDuration......and I set this value with uidefeneitions Visibility .......
and I bind this vaule with the field property visible(Time.......To..........)which I need to hide...........
Now in the view implementation tab ..........I have coded in the doinit method(since my requirement to hide the field from the layout in all cases).........
wdContext.currentFieldVisibilityElement().setOldTimeDuration(WDVisibility.NONE);
But if I deploy the application and see still am getting the same field dispalying in the screen.........
I even tried putting this code in wdmodifyview method.........same results........
Kindly tell me how to hide the field permenantly from the screen............(without any conditions.)
Thanks in Advance,
Dharani

How to change value of instance variable and local variable at run time?

As we can change value at run time using debug mode of Eclipse. I want to do this by using a standalone prgram from where I can change the value of a variable at runtime.
Suppose I have a class, say employee like -
class employee {
public String name;
employee(String name){
this.name = name;
public int showSalary(){
int salary = 10000;
return salary;
public String showName()
return name;
i want to change the value of instance variable "name" and local variable "salary" from a stand alone program?
My standalone program will not use employee class; i mean not creating any instance or extending it. This is being used by any other calss in project.
Can someone tell me how to change these value?
Please help
Regards,
Sujeet Sharma

This is the tutorial You should interest in. According to 'name' field of the class, it's value can be change with reflection. I'm not sure if local variable ('salary') can be changed - rather not.

Inserting in the UUT_Results table a value that we read from our data base from a local variable

We would like to include in the UUT_Results table a value that we read from our data base into a local variable during the execution of our sequence file. We found that by modifying the configure database options we were able to add a column for this variable, but the local variable was not available to be placed into an expression for that column from the local variables or parameters. Is it possible to do this, and if so, how? Station Globals were available to be included in the expression, however the sequence file may be executed on more than one system which makes the Global unavailable on systems other than the one where the sequence file originated.

You can use the TestStand API to programmatically create global variables at runtime, thus ensuring their existence. For example, you could call Engine.Globals.SetValString("GlobalStringVariableName", PropOption_InsertIfMissing, "variable value")
Of course, if you need to test multiple UUTs in parallel, a single global is not sufficient. In that case you might consider adding the field you need to the UUT datatype in the process model. You could then access the field in your sequence via RunState.Root.Locals.UUT.YourNewField = YourNewValue.
If you also want your sequence to run without using a process model, you must check for the existence of the UUT before accessing it. You could use the expression function: PropertyExists("RunState.Root.Locals.UUT.YourNewFi
eld")

How to declare local variables in PL/SQL stored programs

Where do I declare local variables in a PL/SQL stored program?
I get compiler errors with either of the options below:
FUNCTION GET_PRINCIPAL_BALANCE (CUT_OFF_DATE IN DATE, TITLE_SN IN DATE, TOTAL_BALANCE OUT NUMBER) RETURN NUMBER IS
TOTAL_BALANCE NUMBER;
BEGIN
RETURN TOTAL_BALANCE;
END;
FUNCTION GET_PRINCIPAL_BALANCE (CUT_OFF_DATE IN DATE, TITLE_SN IN DATE, TOTAL_BALANCE OUT NUMBER) RETURN NUMBER IS
BEGIN
TOTAL_BALANCE NUMBER;
RETURN TOTAL_BALANCE;
END;

Your local variable cannot have the same name as the formal out parameter. This is a procedure example, but since functions should not have out parameters anyway ...
session2> CREATE PROCEDURE p (p_id IN NUMBER, p_did OUT NUMBER) AS
2     p_did NUMBER;
3 BEGIN
4     p_did := p_id * 2;
5 END;
6 /
Warning: Procedure created with compilation errors.
session2> show error
Errors for PROCEDURE P:
LINE/COL ERROR
0/0      PL/SQL: Compilation unit analysis terminated
1/1      PLS-00410: duplicate fields in RECORD,TABLE or argument list are
         not permittedThe proper way to create a function would be something like:
CREATE FUNCTION f (p_id IN NUMBER) RETURN NUMBER AS
   l_did NUMBER;
BEGIN
l_did := p_id * 2;
RETURN l_did;
END;You should really assign a value to the variable before you return it.
John

Local variable's VariableElement not accessible through treepath

Hi,
I'm extending TreePathScanner visitor to localize and handle certain annotations associated with variables of any kind (field, parameters and local variables).
To do so I overrode the visitVariable method that, as far I understand, should be able to obtain the corresponding javax.lang.model's VariableElement for any variable (whatever its kind) based on the current three path, see code bellow.
It does work well with fields and parameter, however with local variables Trees.getElement simply returns a null. All the information is in fact in the code tree VariableTree node and I could retrieve what I needed from it but rather refrain from using com.sun. ... API if not really necessary and of course implement the processing twice.
Perhaps the javax.lang.model.... object tree is not built for elements within a method body? or is this a bug? com.sun.source.util.Trees#getElement javadoc only says that a null is returned if the element is not "available".
Thanks in advance.
import javax.lang.model.element.VariableElement;
import com.sun.source.util.TreePathScanner;
import com.sun.source.util.Trees;
import com.sun.source.tree.VariableTree;
import com.sun.source.util.TreePath;
public class MyVisitor extends TreePathScanner<Object,Trees> {
     @Override
     public Object visitVariable(VariableTree node, Trees trees) {
          TreePath path = getCurrentPath();
          VariableElement ve = (VariableElement) trees.getElement(path);
          if (ve != null) {
                        // The case for parameters and fields.
                        process(ve);
          else { // Funnily getElement return null for local variables
                        process(node);
          return super.visitVariable(node, trees);
}

I had a similar problem where trees.getElement(TreePath) was returning null. In my case it had to do with the fact that symbol resolution wasn't done yet. I was trying to invoke my TreePathScanner after calling javacTask.parse() but I had to switch to after calling javacTask.analyze() otherwise trees.getElement(TreePath) always returned null. My issues was with a TreePath for a method though.

Local variable in Data Form

Hi All,
I have a dataform in which Entity Dim is in Page. In a Business Rule attached to it there is a variable which should contain the value what ever selected in Entity in Page. Now my issue is what settings i should give while making Entity as local variable in BR in EAS.
What should i give in
Type: It has Members, Dimension, String, Integer, Real etc (I tried with Members & Dimension)
Usage Type : It has Saved Selection, Use by Value, Run-time prompt (I tried with all options)
Please give your inputs.
Thanks

Yes i am on version 11.1.2
I am running BR on save of data in Dataform.
I have not set any limits
I have declared a global variable with Member as type and Usage Type as "RTP"
Please let me know if i need to give any default value. My understanding should be no.<
Let me know if i need to click on check box saying "Do not save value entered during validation and launch as default value". My understanding - doesnot matter.<After that the global variable is appearing in BR
Let me know if i need to select checkbox for Hide. My Understanding should be yes<Thanks

Displaying variable no. of fields for different records

Hi,
I have the requirement of displaying variable no of fields for different type of record in the business object.How can this be done in VC. For example i have to show an extra field for country "IN"
Thanks in advance,
Regards,
Anupam

Hi Anupam,
Please explain ur requirement more clearly.
If understanding is right ,you are creating a Table/Form with the information of a particular company ,and u r interested to add another column to this table and this column should not be visible when to select another company. Am I right?
What is the data source is it a BAPI or Query or Query View?
1)Drag and drop a table from the Query(if suppose).Or form if u want to include in the form.
2)And if u want another field(if it is to be calculated) in ur table u can have include an expression box by clicking a "+" sign in the table and specify the formula for it in the Expression field uder the Data source field in the General Tab.
3)And if u want to hide this field when u select another country then u can set a visibility condition.
4)Go to control properties window of the new field.U can get this by selecting the new added field and by clicking on configure or by left clicking the new field and then selecting the properties.
5)Inside the General Tab, u have UI Control,below that u have Hidden which is a check box, just check it.And click on condition. Then type the condition for it to be hidden.Then it is hidden.
Please try doing the above.
Reward me with points if its helpful.
Thanks,Regards,
Sripriya Srinivasan.

Hide a field

how to hide a field(column) based on the user in basic or secondary list

hi,
          After a write stetment write
          <b>hide fieldnaem</b>
We can use HIDE technique while creating LIST level to store line -specific information for later use.
syntax: HIDE <variable>.
this statement place the contents of the variable <variable> for the current output line(SY-LINNO) into the HIDE area.
you can think of the HIDE area as a table, in which the system stores the field name, field contents and line number in which field exisisting. as soon as they are needed the system reads the values from the table(HIDE) using READ LINE statement.
Keep in mind while working with HIDE.
1) Allways keep HIDE <variable> statement after WRITE statement for more readable format.
2) All way keep HIDE <variable> statement inside the LOOP statement, because syatem stores all the hide variable in system genarated table space, we can process table data throug it's work area only.
Sample Program.
Report Zreport_hide.
*table work area
tables: lfa1,ekko,ekpo.
*selection-screen logic
select-options: s_lifnr for lfa1-lifnr obligatory.
*logic for creating internal table
data: begin of it _lfa1 occurs 0,
              it_lifnr like lfa1-lifnr,
              name1 like lfa1-name1,
       end of it_lfa1.
data: begin of it _ekko occurs 0,
              it_ebeln like ekko-ebeln,
              aedat like ekko-aedat,
       end of it_ekko.
logic for genarating basic list
start-of-selection.
select lifnr name1 from lfa1 into table it_lfa1   where lifnr in s_lifnr.
*processing the data.
loop at it_lfa1.
write:/ it_lfa1-lifnr,
          it_lfa1-name1,'
          HIDE it_lfa1-lifnr. "here hide the varible lifnr
endloop.
*logic for genarating secondary list
at line-selection.
case sy-lsind.
when 1.
select ebeln aedat from ekko into table it_ekko   where lifnr = it_lfa1-lifnr.
*processing seconadry list data.
loop at it_ekko.
write:/ it_ekko-ebeln,
          it_ekko-aedat,
endloop.
regards,
Regards
Message was edited by:
        ASHOK KUMAR

Inner class inside a method - how does it access method's local variable?

hello All:
I've learnt that, an inner class, if defined inside a method, it can access the method's local variables, only when they are defined as "final".
Anyone can help explain the rationale behind it?
Thanks a lot!
Sway

fathomBoat wrote:
In java, everything is about pass-by-reference.
Wrong! Nothing in Java is ever pass-by-reference.
Java uses pass-by-value everywhere.
It makes sense to me if the reason of enforcing a variable to be "final" is to prevent it being messed up.No, the reason is that a copy is made and if the variable weren't final then it could change later on and the developer could be confused because his inner class didn't "see" that change.
The variable being final prevents that scenario.
However, if a copy of the variable is made inside the inner class, i dont see how possible it could affect variables outside of class?Such a copy is made, but the language designers wanted to hide that fact from the developer. By forcing all accessed variables to be declared final the developer has no way to realize that he's actually working on a copy.

Print local variable from print prog into sapscript

Hi,
I have one local variable declared in the print program for one SAP-form. I want to print it in some window of that form.
How do i pass that variable to the form for printing ?
Thanks & Regards
Hrishi

Problem solved
EXCL_VAT is a quantity field and the value field in ITCSY is a Character field, so had to change the code in the following manner.
write EXCL_VAT to outtab-value.
condense outtab-value.
Regards
Hrishi

Store Counter Number in BODS using Global/Local Variable

Hi All,
Anyone done before adding a counter integer field into a table based on key via BODS?
Example:
Table 1 (contains just 1 field) <-Input:
Key 1
Key 1
Key 2
Key 2
Key 2
Table 2(contains 2 fields with INT as the 2nd field) <-Output:
Key 1      1
Key 1      2
Key 2      1
Key 2      2
Key 2      3
I was wondering if populating the Local Variable or Global Variable might work but from my understanding, inside the Data Flow , it's not possible to increase the variable value ($count = $count + 1).

Hi Maurice,
Thats a good idea!!
I had currently implemented a solution where i use Variables and Customize Functions to solve the problem.
Will give a try and see if your solution produce the same result.
Tim

Local variable modification/access events in JPDA?

Dear Folks,
I am wondering if I can monitor modification/access events for local variables in JPDA. I used to use JDI as a tool to implement my project, but unfortunately there were only modification/access events for fields. Could someone tell me whether JVMTI (or any other tool from Sun) supports this?
Another problem when I was using JDI is that given an ObjectReference, I was not able to retrieve the underlying object in the target VM? Does there exist any solution to this problem?
Thank you very much for your help!
Sunny

Hello,
There are no such JVM TI watchpoint events yet.
Please, see the RFE:
4228507 Add local variable and array element watchpoints
Thanks,
Serguei

Local variable hides a field

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