Objects and instance methods for JSP?

I've been looking through the JSP 2.0 specification and, while I'm extremely impressed with the improvements in this version, I'm also disappointed to see that everything still boils down to statically bound methods.
What I mean by this is that the template part of a JSP is like an anonomously named static method associated with the JSP class. The new tag-files in JSP 2.0 are terrific, but they also have this same kind of static binding.
As far as I know, only JPlates (www.jplates.com) allows you to develop web applications using actual instances of classes that have instance methods for expressing the template parts. Are there any other template processing systems that support real object-oriented development of dynamic content-generation applications?

By an amazing coincidence, the domain name jplates.com is registered to a Daniel Jacobs and your user name is djacobs. What are the odds of that?
If you're going to plant commercials, you need to disguise them better than this.

Similar Messages

Name space conflict between static and instance method

Hello,
there seems to be a very unfortunate name space conflict between static and instance method name. Consider:
static String description() that should return a description of a class.
String description() that should return a description of an instance.
That seems to confuse the compiler. How come? Static and instance methods don't have anything to get confused about.
Thanks for any insights :-)

Umm...jeez.
It's not a bug, it's the way it's supposed to be.
Since a static method can be called the same way an instance method
A instance = new A();
A.staticMethod();
instance.staticMethod();it's not allowed.
Also in the class, you can call
public void myMethod() {
instanceMethodInClass(); // You don't need this, it's superfluous
staticMethodInClass(); // You don't need the class name.
}If you didn't understand, then just accept the fact that it is so. Some day you'll understand it.

Tiling and collision methods for this app

I plan on making a game where the player travels down though a level. I have created basic player/objects collision games using AS2 & Mclips for browser/PC and some basic AS3 apps also, but I want to focus on making this one to run well/fast on iOS and Android via flash/AIR.
The goal will be for the player to avoid colliding with rock/tiles. There will not be too many enemies to track but a few powerups may be on the rock edges to pickup.
Can someone give me any suggestions/links for current Tiling and Collision methods for this environment? Should I use starling?

Thanks Glad, I hear that a pixel perfect collision method like bitmapdata hittest can be a tremendous overhead in CPU time, but I guess I will have to try it and see.

How to get text name text object and text id for long text

Hi,
I am trying to fetch Long text for a given order number from transaction CO04 in SAPScript. I know that I have to use Include X (OBJECT) XX ID XXX.
How do I get the text name, text object and text id for the order header long text from Transaction CO04.
Points will be awarded..
Tushar

Tushar,
When you are in CO02, and are at the Long Text Tab,click on the Icon that is next to the Order Number at the top of the screen (this icon looks like a Pencil and a Pad of Paper and is called "Change Long Text"). When you click on this it will take you to the SAPscript Editor. Now hit Goto->Header and you will get the data you require.
Hope this helps.
Cheers,
Pat.
PS. Kindly award Reward Points as appropriate.

Can we hav call transaction and session method for an application

can we hav call transaction and session method for an application ?if yes how?

Hi ,
You can. If Call Transaction fails, a batch input session can be created.
Check this example-
Call the transaction. Messages from Call Transaction are stored in the
internal table messtab
CALL TRANSACTION 'LT01' USING bdc_tab MODE 'N' UPDATE 'S'
      MESSAGES INTO messtab.
IF sy-subrc = 0.
Call transaction successfull, get the number of the Transfer Order that
was created
    LOOP AT messtab.
      IF messtab-dynumb = '0104' AND messtab-msgnr = '016'.
        w_transportorderno = messtab-msgv1.
      ENDIF.
    ENDLOOP.
ELSE.
Call transaction failed, create a batch input session instead.
    PERFORM open_group.
    PERFORM bdc_insert USING 'LT01'.
    PERFORM close_group.
ENDIF.
Regards,
Sookshma

Can one combine static and instance methods?

Hi,
Can one define a method so that is can be used as both a static or an instance method?
Basically I'm trying to simplify my class to so that I can call a method either statically with parameters or instantiated using it's own attributes.
In other words, I'm trying to accomplish both of these with one method:
zcl_myclass=>do_something_static( im_key = '1234' ).
lv_myclass_instance->do_something( ).   " key in private attributes
Why would I want to do that?
I would like to avoid instantiation in some cases for performance reasons and would like to keep it simple by having only one method to do basically the same thing.
Any input or alternative suggestions welcome.
Cheers,
Mike

Ok, I may be reaching here a bit, I know, but maybe this may give you some ideas. After creating the object, pass it back to the method call.
report zrich_0001.
*       CLASS lcl_app DEFINITION
class lcl_app definition.
public section.
    data: a_attribute type string.
    class-methods: do_something importing im_str type string
                               im_ref type ref to lcl_app optional.
endclass.
*       CLASS lcl_app IMPLEMENTATION
class lcl_app implementation.
method do_something.
    if not im_ref is initial.
       im_ref->a_attribute = im_str.
      write:/ 'Do_Something - ', im_ref->a_attribute.
    else.
      write:/ 'Do_Something - ', im_str.
    endif.
endmethod.
endclass.
data: o_app type ref to lcl_app.
start-of-selection.
create object o_app.
call method o_app->do_something(
           exporting
               im_str = 'Instansiated'
               im_ref = o_app ).
call method lcl_app=>do_something(
           exporting
               im_str = 'Static' ).
Regards,
Rich Heilman

Object and reference accessing for primitives, objects and collections

Hi,
I have questions re objects, primitives and collection accessing and references
I made a simple class
public class SampleClass {
     private String attribute = "default";
     public SampleClass()
     public SampleClass(SampleClass psampleClass)
          this.setAttribute(psampleClass.getAttribute());
          if (this.getAttribute() == psampleClass.getAttribute())
               System.out.println("INSIDE CONSTRUCTOR : same object");
          if (this.getAttribute().equals(psampleClass.getAttribute()))
               System.out.println("INSIDE CONSTRUCTOR : equal values");
     public void setAttribute(String pattribute)
          this.attribute = pattribute;
          if (this.attribute == pattribute)
               System.out.println("INSIDE SETTER : same object");
          if (this.attribute.equals(pattribute))
               System.out.println("INSIDE SETTER : equal values");
     public String getAttribute()
          return this.attribute;
     public static void main(String[] args) {
...and another...
public class SampleClassUser {
     public static void main(String[] args) {
          SampleClass sc1 = new SampleClass();
          String test = "test";
          sc1.setAttribute(new String(test));
          if (sc1.getAttribute() == test)
               System.out.println("SampleClassUser MAIN : same object");
          if (sc1.getAttribute().equals(test))
               System.out.println("SampleClassUser MAIN : equal values");
          SampleClass sc2 = new SampleClass(sc1);
          sc1.setAttribute("test");
          if (sc2.getAttribute() == sc1.getAttribute())
               System.out.println("sc1 and sc2 : same object");
          if (sc2.getAttribute().equals(sc1.getAttribute()))
               System.out.println("sc1 and sc2 : equal values");
}the second class uses the first class. running the second class outputs the following...
INSIDE SETTER : same object
INSIDE SETTER : equal values
SampleClassUser MAIN : equal values
INSIDE SETTER : same object
INSIDE SETTER : equal values
INSIDE CONSTRUCTOR : same object
INSIDE CONSTRUCTOR : equal values
INSIDE SETTER : same object
INSIDE SETTER : equal values
sc1 and sc2 : equal values
...i'm just curios why the last 3 lines are the way they are.
INSIDE SETTER : same object
INSIDE SETTER : equal values
sc1 and sc2 : equal values
how come while inside the setter method, the objects are the same object, and after leaving the setter method are not the same objects?
Can anyone point a good book that shows in detail how objects, primitives and collections are referenced, especially when passed to methods. Online reference is preferred since the availability of books can be a problem for me.
Thanks very much

You are confusing references with objects.
This compares two object references:
if( obj1 == obj2 ) { // ...Whereas this compares two objects:
if( obj1.equals(obj2) ) { // ...A reference is a special value which indicates where in memory two objects happen to be. If you create two strings with the same value they won't be in the same place in memory:
String s1 = new String("MATCHING");
String s2 = new String("MATCHING");
System.out.println( s1 == s2 ); // false.But they do match:
System.out.println( s1.equals(s2) ); // trueIf you're using a primitive then you're comparing the value that you're interested in. E.g.
int x = 42;
int y = 42;
System.out.println(x == y); // trueBut if you're comparing references you're usually more interested in the objects that they represent that the references themselves.
Does that clarify matters?
Dave.

How to set timer intervals for object + and a motion for entering stage

Hi, I am making a simple game but I have a couple problems/queries.
1) My game is a touch an object and you get a point game, currently the objects appear randomly over the screen, however I am trying to get it to slide into the screen similar to the Fruit Ninja game, but not limited to entering from one side, does anyone know how to set this?
2) As I mentioned above my objects appear randomly, I have set a timer when I change the timer from 800 to another number, it just makes all the objects on the screen last for 800 milliseconds all at the same time then disappear and appear somewhere else on the screen for another 800 milliseconds and it repeats, what I am trying to do is make them come at different intervals, for example:
Object 1 - constantly appears, so when the 800 millisecond is over, it comes back on a different part of the stage
Object 2 - I want it to appear every 5 seconds, so when the 800 millisecond is over it will come back on the stage in 5 seconds, but not instantly like Object 1
But I have no idea how to do this :/ anyone have the code needed for me to do this?
Sorry for the long questions, I only asked because I really am stuck, I have been trying to do this for over 2 weeks now.
Thanks very much.
My Code
[Code]
//importing tween classes
import fl.transitions.easing.*;
import fl.transitions.Tween;
import flash.utils.Timer;
//hiding the cursor
Mouse.hide();
var count:Number = 60;
var myTimer:Timer = new Timer(1000,count);
myTimer.addEventListener(TimerEvent.TIMER, countdown);
myTimer.start();
function countdown(event:TimerEvent):void {
myText_txt.text = String((count)-myTimer.currentCount);
if(myText_txt.text == "0"){
gotoAndStop(5)
//creating a new Star instance;
var star:Star = new Star();
var box:Box = new Box();
var bomb:Bomb = new Bomb();
//creating the timer
var timer:Timer = new Timer(800);
var timerbox:Timer = new Timer(850);
var timerbomb:Timer = new Timer(1000);
//we create variables for random X and Y positions
var randomX:Number;
var randomY:Number;
//variable for the alpha tween effect
var tween:Tween;
//we check if a star instance is already added to the stage
var starAdded:Boolean = false;
var boxAdded:Boolean = false;
var bombAdded:Boolean = false;
//we count the points
var points:int = 0;
//adding event handler to the timer;
timer.addEventListener(TimerEvent.TIMER, timerHandler);
//starting the timer;
timer.start();
function timerHandler(e:TimerEvent):void
          //first we need to remove the star from the stage if already added
          if (starAdded)
                    removeChild(star);
          if (boxAdded)
                    removeChild(box);
          if (bombAdded)
                    removeChild(bomb);
          //positioning the star on a random position
          randomX = Math.random() * 800;
          randomY = Math.random() * 1280;
          star.x = randomX;
          star.y = randomY;
          star.rotation = Math.random() * 360;
          box.x = Math.random() * stage.stageWidth;
          box.y = Math.random() * stage.stageHeight;
          box.rotation = Math.random() * 360;
          bomb.x = Math.random() * stage.stageWidth;
          bomb.y = Math.random() * stage.stageHeight;
          bomb.rotation = Math.random() * 360;
          //adding the star to the stage
          addChild(star);
          addChild(box);
          addChild(bomb);
          //changing our boolean value to true
          starAdded = true;
          boxAdded = true;
          bombAdded = true;
          //adding a mouse click handler to the star
          star.addEventListener(MouseEvent.CLICK, clickHandler);
          box.addEventListener(MouseEvent.CLICK, clickHandlerr);
          bomb.addEventListener(MouseEvent.CLICK, clickHandlerrr);
function clickHandlerr(e:Event):void
          //when we click/shoot a star we increment the points
          points += 5;
          //showing the result in the text field
          points_txt.text = points.toString();
                    if (boxAdded)
                    removeChild(box);
          boxAdded = false;
function clickHandler(e:Event):void
          //when we click/shoot a star we increment the points
          points++;
          //showing the result in the text field
          points_txt.text = points.toString();
          if (starAdded)
                    removeChild(star);
          starAdded = false;
function clickHandlerrr(e:Event):void
          gotoAndPlay(5);
[/Code]

The only thing that affects TopLink is the increment by, as increasing this is what allows TopLink to reduce the number of times it needs to go to the database to get additional numbers. Ie, an increment value of 1 means TopLink needs to go the database after each insert; an increment value of 50 allows it to insert 50 times before having to get a value from the sequence. The cache on the sequence object in the database affect the database access times. While it may improve the access times when the sequence number is obtained from the database, but I believe the network access to obtain the sequence is the greater concern and slow down for most applications. It all depends on the application usage and design though - an increment (and application cache) of 50 numbers seems to be the best default.
I cannot say what effect the cache vs nocache settings will have on your application, as it will depend on the database load. Only performance testing and tuning will truly be able to tell you whats best for your application.
Best Regards,
Chris

Housebank and payment method for vendor

Hi
While doing MIRO, i want housebank and payment method to populate from vendor master data. I maintained both these details in VM data but its not populating automatically in MIRO. Please help. (m using ECC 6)
Sadhana

Thanks Rinku.
If we keep house bank and payment method fields blank while doing data entry, system will pick them up from VM data at the time of payment run. Right??
But if the housebank field is mandatory for data entry (as in my scenario), then we have no option but to fill the fields up at the time of MIRO or FB60.
In my scenario, daily there are 150 bills processed at one centre, and the user has to fill up these two fields every time. Is there any other solution so that this trouble can be saved?
Thanks (points assigned).

FM and/or method for displaying file from frontend ?

hi there,
i have word-documents, excel-sheets, PDF'S, etc.......... on my frontend PC.
i need a function module and/or method of class to OPEN this files. do you
have any hints for me ?
regards, Martin

hi,
thanks a lot, friends. i found out that execute from cl_gui_frontend_services works perfect for me.
BUT: is it possible to load a file from APPLICATION server too ? in the example below
file is on presentation (client).
call method cl_gui_frontend_services=>execute
      exporting
        document = 'C:\Dokumente und Einstellungen\d78358\ALTMP_D01_2.PDF'
          maximized = 'X'
        exceptions
        others   = 1.

Speed and course methods for location object don't work

I am attempting to use the Location API (JSR 179) to extract the course and speed (getCourse() and getSpeed() of Location object) of the user on a Nokia N95. However, no matter what speed I am travelling at or how good the GPS signal is, NaN is returned. Other fields like latitude and longitude work fine. Why is this? Were these methods never implemented? The problem clearly does not lie with the GPS or the device, as the built-in Symbian applications have no trouble returning course or speed information. Why do these methods not work?

Hello,
Since you provided no code to show what yu are doing, and you don't give any indication of what " i have some troubles" means, I'd Bing "C# playback .vob files".
Also, see
How to ask questions in a technical forum.
Karl
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer.
My Blog: Unlock PowerShell
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How to Implement Abap Object and Access Key for se24 developers.

Hi every One,
This is Abdul Rahman, Started Learning Abap Objects i want a simple program to be executed i.e. in Local class (Abap program)and as well in global class(class builder).
Also i would like to know When ,Were and Why Abap Object should be used.
prob to Me :- When i wanted execute F8 a Class in se24 Class Builder it is asking me AcessKey , plz if this is required plz any one send Me.
I have this key 36687663221261278694 it is already used in Abap editor , it is not accepting in se24 .
plz help Me , waiting for response ..
thankyou so much
Abdul Rahman.

Hello Abdul
Here are my answers to your questions:
(1) Local classes: Do not use them.
- As long as your class is rather small (few attributes and methods), local classes are ok yet as soon as they become larger you will loose the overview
(2) Global classes: Do use them.
- Make use of global classes even if they are only used for your training. The big advantage over local classes is that you will get used to the classe builder (SE24) which has a plethora of functions.
(3) Executing global classes: Can be done if you have defined an OO-transaction.
- An OO-transaction has a class and one of its public methods as parameters (similar like report transactions). When you all the OO-transaction an instance of you class is created and the public method is called.
(4) Where and Why use ABAP Objects? Everywhere. Anytime.
- ABAP objects is about stability, maintainability and re-usability of coding. These developer aims can be much more fulfilled using ABAP OO means than in classical programming.
Regards
Uwe
PS: There are situations where local classes are quite appropriate and, using ABAP Unit testing, are obligatory.

OLE objects and OO methods - Error using OLE automation

Hi,
I'm developing an class to read/write excel sheets and i'm getting an error on the OLE method that is:
on this instruction
call method of l_obj_excel 'WORKBOOKS' = l_workb_col.
i got a dump that give me the following error UC_OBJECTS_NOT_CONVERTIBLE
The strange is that i've got the same code running on reports and it works fine only when passing it to a oo method i get that dump.
Thzs in advanced to all
Best regards
Jaime

hi check this..
Report ZMULTICOLOR_TEST no standard page heading.
this report demonstrates how to send some ABAP data to an
EXCEL sheet using OLE automation.
include ole2incl.
handles for OLE objects
data: h_excel type ole2_object, " Excel object
 h_mapl type ole2_object, " list of workbooks
 h_map type ole2_object, " workbook
 h_zl type ole2_object, " cell
 h_f type ole2_object, " font
 h_c type ole2_object. " color
DATA: FILENAME LIKE RLGRAP-FILENAME.
tables: spfli.
data h type i.
table of flights
data: it_spfli like spfli occurs 10 with header line.
*& Event START-OF-SELECTION
start-of-selection.
read flights
select * from spfli into table it_spfli.
display header
uline (61).
write: / sy-vline no-gap,
 (3) 'Flg'(001) color col_heading no-gap, sy-vline no-gap,
 (4) 'Nr'(002) color col_heading no-gap, sy-vline no-gap,
 (20) 'Von'(003) color col_heading no-gap, sy-vline no-gap,
 (20) 'Nach'(004) color col_heading no-gap, sy-vline no-gap,
 (8) 'Zeit'(005) color col_heading no-gap, sy-vline no-gap.
uline /(61).
display flights
loop at it_spfli.
 write: / sy-vline no-gap,
 it_spfli-carrid color col_key no-gap, sy-vline no-gap,
 it_spfli-connid color col_normal no-gap, sy-vline no-gap,
 it_spfli-cityfrom color col_normal no-gap, sy-vline no-gap,
 it_spfli-cityto color col_normal no-gap, sy-vline no-gap,
 it_spfli-deptime color col_normal no-gap, sy-vline no-gap.
endloop.
uline /(61).
tell user what is going on
call function 'SAPGUI_PROGRESS_INDICATOR'
 exporting
 PERCENTAGE = 0
 text = text-007
 exceptions
 others = 1.
start Excel
create object h_excel 'EXCEL.APPLICATION'.
PERFORM ERR_HDL.
set property of h_excel 'Visible' = 1.
CALL METHOD OF H_EXCEL 'FILESAVEAS' EXPORTING #1 = 'c:\kis_excel.xls' .
PERFORM ERR_HDL.
tell user what is going on
call function 'SAPGUI_PROGRESS_INDICATOR'
 exporting
 PERCENTAGE = 0
 text = text-008
 exceptions
 others = 1.
get list of workbooks, initially empty
call method of h_excel 'Workbooks' = h_mapl.
perform err_hdl.
add a new workbook
call method of h_mapl 'Add' = h_map.
perform err_hdl.
tell user what is going on
call function 'SAPGUI_PROGRESS_INDICATOR'
 exporting
 PERCENTAGE = 0
 text = text-009
 exceptions
 others = 1.
output column headings to active Excel sheet
perform fill_cell using 1 1 1 200 'Carrier id'(001).
perform fill_cell using 1 2 1 200 'Connection id'(002).
perform fill_cell using 1 3 1 200 'City from'(003).
perform fill_cell using 1 4 1 200 'City to'(004).
perform fill_cell using 1 5 1 200 'Dep. Time'(005).
loop at it_spfli.
copy flights to active EXCEL sheet
 h = sy-tabix + 1.
 if it_spfli-carrid cs 'AA'.
 perform fill_cell using h 1 0 000255000 it_spfli-carrid.
 elseif it_spfli-carrid cs 'AZ'.
 perform fill_cell using h 1 0 168000000 it_spfli-carrid.
 elseif it_spfli-carrid cs 'JL'.
 perform fill_cell using h 1 0 168168000 it_spfli-carrid.
 elseif it_spfli-carrid cs 'LH'.
 perform fill_cell using h 1 0 111111111 it_spfli-carrid.
 elseif it_spfli-carrid cs 'SQ'.
 perform fill_cell using h 1 0 100100100 it_spfli-carrid.
 else.
 perform fill_cell using h 1 0 000145000 it_spfli-carrid.
 endif.
 if it_spfli-connid lt 400.
 perform fill_cell using h 2 0 255000255 it_spfli-connid.
 elseif it_spfli-connid lt 800.
 perform fill_cell using h 2 0 077099088 it_spfli-connid.
 else.
 perform fill_cell using h 2 0 246156138 it_spfli-connid.
 endif.
 if it_spfli-cityfrom cp 'S*'.
 perform fill_cell using h 3 0 155155155 it_spfli-cityfrom.
 elseif it_spfli-cityfrom cp 'N*'.
 perform fill_cell using h 3 0 189111222 it_spfli-cityfrom.
 else.
 perform fill_cell using h 3 0 111230222 it_spfli-cityfrom.
 endif.
 if it_spfli-cityto cp 'S*'.
 perform fill_cell using h 4 0 200200200 it_spfli-cityto.
 elseif it_spfli-cityto cp 'N*'.
 perform fill_cell using h 4 0 000111222 it_spfli-cityto.
 else.
 perform fill_cell using h 4 0 130230230 it_spfli-cityto.
 endif.
 if it_spfli-deptime lt '020000'.
 perform fill_cell using h 5 0 145145145 it_spfli-deptime.
 elseif it_spfli-deptime lt '120000' .
 perform fill_cell using h 5 0 015215205 it_spfli-deptime.
 elseif it_spfli-deptime lt '180000' .
 perform fill_cell using h 5 0 000215205 it_spfli-deptime.
 else.
 perform fill_cell using h 5 0 115115105 it_spfli-deptime.
 endif.
endloop.
EXCEL FILENAME
CONCATENATE SY-REPID '_' SY-DATUM6(2) '_' SY-DATUM4(2) '_'
 SY-DATUM(4) '_' SY-UZEIT '.XLS' INTO FILENAME.
CALL METHOD OF H_MAP 'SAVEAS' EXPORTING #1 = FILENAME.
free object h_excel.
perform err_hdl.
 FORM FILL_CELL *
 sets cell at coordinates i,j to value val boldtype bold *
form fill_cell using i j bold col val.
call method of h_excel 'Cells' = h_zl
 exporting
 #1 = i
 #2 = j.
perform err_hdl.
set property of h_zl 'Value' = val .
perform err_hdl.
get property of h_zl 'Font' = h_f.
perform err_hdl.
set property of h_f 'Bold' = bold .
perform err_hdl.
set property of h_f 'Color' = col.
perform err_hdl.
endform. "FILL_CELL
*& Form ERR_HDL
 outputs OLE error if any *
--> p1 text
<-- p2 text
form err_hdl.
if sy-subrc <> 0.
 write: / 'OLE-Automation Error:'(010), sy-subrc.
 stop.
endif.
endform. " ERR_HDL
regards,
venkat

How to install eclipse and MyEclipse and use it for jsp-servlet-web service

hi ,
please help me to install eclipse 3.1 and How to integrate MyEclipse to do jsp-servlet programming and web services.
please also help me to include application server like tomcat and axis and use that environment in MyEclipse ide.
please help me.....

At the time of installation , you can't change SID XE.
After installation, you can add another service name
Check following thread for more details
Re: How to create service on Oracle 10g XE
- Virag Sharma
http://virag.sharma.googlepages.com
http://viragsharma.blogspot.com

How to get the CanGoBack property and GoBack() method for windows 8 store app

Hi Everybody,
I m working windows 8 store app with webview. Here I have two buttons for go back and go forward. But i didn't have default property for goback and goforward. How can i achieve this?

Thanks Rob Caplan
Actually I want solution for XAML.
I achieve this by using list and maintaining the the current item position of current URL.
See the Sample code:
In webview loadingcomplete event track the url navigations
private int _bacListPositionElevate = -1;
webView.LoadCompleted += (object s, NavigationEventArgs e) =>
_currentUri = e.Uri;
if (_currentUri != null)
if (_currentUri != elevateNavigationStack[_bacListPositionElevate])
elevateNavigationStack.Add(_currentUri);
_bacListPositionElevate++;
Now in the back button decrease the position like this:
_bacListPositionElevate--;
webView.Navigate(elevateNavigationStack[_bacListPositionElevate]);
BackButton.IsTapEnabled = (_backStackPositionElevate != 0);
FrwdButton.IsTapEnabled = (_backStackPositionElevate < elevateNavigationStack.Count - 1);
Now in the forward button increase the position like this:
_bacListPositionElevate++;
wvElevate.Navigate(elevateNavigationStack[_bacListPositionElevate]);
imgElevateBack.IsTapEnabled = (_backStackPositionElevate != 0);
imgElevateFwrd.IsTapEnabled = (_backStackPositionElevate < elevateNavigationStack.Count - 1);

Objects and instance methods for JSP?

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