Using an array in one class from another
If I create a new string array in a class, and then set the values in that class, how can I use these value in another class? The way I have tried is to create a new instance of the class that holds the array, but when thinking about it, if I create a new instance surely the value in the array wont have been set? hence why when I am trying to use the array all the values are null.
Thanks
You could create a member variable in one class, making the the variable of the other class' type. Then simply call one of the member object's methods, passing the array reference as an argument.
Similar Messages
-
Calling a method of one class from another withing the same package
hi,
i've some problem in calling a method of one class from another class within the same package.
for eg. if in Package mypack. i'm having 2 files, f1 and f2. i would like to call a method of f2 from f1(f1 is a servlet) . i donno exactly how to instantiate the object for f2. can anybody please help me in this regard.
Thank u in advance.
Regards,
FazliThis is what my exact problem.
i've created a bean (DataBean) to access the database. i'm having a servlet program (ShopBook). now to check some details over there in the database from the servlet i'm in need to use a method in the DataBean.
both ShopBook.java and DataBean.java lies in the package shoppack.
in ShopBook i tried to instantiate the object to DataBean as
DataBean db = new DataBean();
it shows the compiler error, unable to resolve symbol DataBean.
note:
first i compiled DataBean.java, it got compiled perfectly and the class file resides inside the shoppack.
when i'm trying to compile the ShopBook its telling this error.
hope i'm clear in explaining my problem. can u please help me?
thank u in advance.
regards,
Fazli -
Accessing a variable defined in one class from another class..
Greetings,
I've only been programming in as3 for a couple months, and so far I've written several compositional classes that take MovieClips as inputs to handle behaviors and interactions in a simple game I'm creating. One problem I keep coming upon is that I'd love to access the custom variables I define within one class from another class. In the game I'm creating, Main.as is my document class, from which I invoke a class called 'Level1.as' which invokes all the other classes I've written.
Below I've pasted my class 'DieLikeThePhishes'. For example, I would love to know the syntax for accessing the boolean variable 'phish1BeenHit' (line 31) from another class. I've tried the dot syntax you would use to access a MovieClip inside another MovieClip and it doesn't seem to be working for me. Any ideas would be appreciated. Thanks,
- Jeremy
package jab.enemy
import flash.display.MovieClip;
import flash.events.Event;
import jab.enemy.MissleDisappear;
public class DieLikeThePhishes
private var _clip2:MovieClip; // player
private var _clip3:MovieClip; //phish1
private var _clip4:MovieClip; //phish2
private var _clip5:MovieClip; //phish3
private var _clip6:MovieClip; //phish4
private var _clip10:MovieClip; // background
private var _clip11:MovieClip // missle1
private var _clip12:MovieClip // missle2
private var _clip13:MovieClip // missle3
private var _clip14:MovieClip // missle4
private var _clip15:MovieClip // missle5
private var _clip16:MovieClip // missle6
private var _clip17:MovieClip // missle7
private var _clip18:MovieClip // missle8
private var _clip19:MovieClip // missle9
private var _clip20:MovieClip // missle10
private var _clip21:MovieClip // missle11
private var _clip22:MovieClip // missle12
var ay1 = 0;var ay2 = 0;var ay3 = 0;var ay4 = 0;
var vy1 = 0;var vy2 = 0;var vy3 = 0;var vy4 = 0;
var phish1BeenHit:Boolean = false;var phish2BeenHit:Boolean = false;
var phish3BeenHit:Boolean = false;var phish4BeenHit:Boolean = false;
public function DieLikeThePhishes(clip2:MovieClip,clip3:MovieClip,clip4:MovieClip,clip5:MovieClip,clip6:M ovieClip,clip10:MovieClip,clip11:MovieClip,clip12:MovieClip,clip13:MovieClip,clip14:MovieC lip,clip15:MovieClip,clip16:MovieClip,clip17:MovieClip,clip18:MovieClip,clip19:MovieClip,c lip20:MovieClip,clip21:MovieClip,clip22:MovieClip)
_clip2 = clip2;_clip3 = clip3;_clip4 = clip4;_clip5 = clip5;_clip6 = clip6;
_clip10 = clip10;_clip11 = clip11;_clip12 = clip12;_clip13 = clip13;_clip14 = clip14;
_clip15 = clip15;_clip16 = clip16;_clip17 = clip17;_clip18 = clip18;_clip19 = clip19;
_clip20 = clip20;_clip21 = clip21;_clip22= clip22;
_clip3.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame)
function onEnterFrame(event:Event):void
vy1+= ay1;_clip3.y += vy1; vy2+= ay2;_clip4.y += vy2;
vy3+= ay3;_clip5.y += vy3; vy4+= ay4;_clip6.y += vy4;
if (phish1BeenHit ==false)
if(_clip3.y >620)
{_clip3.y = 620;}
if (phish2BeenHit ==false)
if(_clip4.y >620)
{_clip4.y = 620;}
if (phish3BeenHit ==false)
if(_clip5.y >620)
{_clip5.y = 620;}
if (phish4BeenHit ==false)
if(_clip6.y >620)
{_clip6.y = 620;}
if (_clip11.hitTestObject(_clip3) ||_clip12.hitTestObject(_clip3)||_clip13.hitTestObject(_clip3)||_clip14.hitTestObject(_cl ip3)||_clip15.hitTestObject(_clip3)||_clip16.hitTestObject(_clip3)||_clip17.hitTestObject( _clip3)||_clip18.hitTestObject(_clip3)||_clip19.hitTestObject(_clip3)||_clip20.hitTestObje ct(_clip3)||_clip21.hitTestObject(_clip3)||_clip22.hitTestObject(_clip3))
_clip3.scaleY = -Math.abs(_clip3.scaleY);
_clip3.alpha = 0.4;
ay1 = 3
vy1= -2;
phish1BeenHit = true;
if (_clip11.hitTestObject(_clip4) ||_clip12.hitTestObject(_clip4)||_clip13.hitTestObject(_clip4)||_clip14.hitTestObject(_cl ip4)||_clip15.hitTestObject(_clip4)||_clip16.hitTestObject(_clip4)||_clip17.hitTestObject( _clip4)||_clip18.hitTestObject(_clip4)||_clip19.hitTestObject(_clip4)||_clip20.hitTestObje ct(_clip4)||_clip21.hitTestObject(_clip4)||_clip22.hitTestObject(_clip4))
_clip4.scaleY = -Math.abs(_clip4.scaleY);
_clip4.alpha = 0.4;
ay2 = 3
vy2= -2;
phish2BeenHit = true;
if (_clip11.hitTestObject(_clip5) ||_clip12.hitTestObject(_clip5)||_clip13.hitTestObject(_clip5)||_clip14.hitTestObject(_cl ip5)||_clip15.hitTestObject(_clip5)||_clip16.hitTestObject(_clip5)||_clip17.hitTestObject( _clip5)||_clip18.hitTestObject(_clip5)||_clip19.hitTestObject(_clip5)||_clip20.hitTestObje ct(_clip5)||_clip21.hitTestObject(_clip5)||_clip22.hitTestObject(_clip5))
_clip5.scaleY = -Math.abs(_clip5.scaleY);
_clip5.alpha = 0.4;
ay3 = 3
vy3= -2;
phish3BeenHit = true;
if (_clip11.hitTestObject(_clip6) ||_clip12.hitTestObject(_clip6)||_clip13.hitTestObject(_clip6)||_clip14.hitTestObject(_cl ip6)||_clip15.hitTestObject(_clip6)||_clip16.hitTestObject(_clip6)||_clip17.hitTestObject( _clip6)||_clip18.hitTestObject(_clip6)||_clip19.hitTestObject(_clip6)||_clip20.hitTestObje ct(_clip6)||_clip21.hitTestObject(_clip6)||_clip22.hitTestObject(_clip6))
_clip6.scaleY = -Math.abs(_clip6.scaleY);
_clip6.alpha = 0.4;
ay4 = 3
vy4= -2;
phish4BeenHit = true;
if (_clip3.y > 10000)
_clip3.x = 1000 +3000*Math.random()-_clip10.x;
_clip3.y = 300;
_clip3.alpha = 1;
_clip3.scaleY = Math.abs(_clip3.scaleY);
ay1 = vy1 = 0;
phish1BeenHit = false;
if (_clip4.y > 10000)
_clip4.x = 1000 +3000*Math.random()-_clip10.x;
_clip4.y = 300;
_clip4.alpha = 1;
_clip4.scaleY = Math.abs(_clip4.scaleY);
ay2 = vy2 = 0;
phish2BeenHit = false;
if (_clip5.y > 10000)
_clip5.x = 1000 +3000*Math.random()-_clip10.x;
_clip5.y = 300;
_clip5.alpha = 1;
_clip5.scaleY = Math.abs(_clip5.scaleY);
ay3 = vy3 = 0;
phish3BeenHit = false;
if (_clip6.y > 10000)
_clip6.x = 1000 +3000*Math.random()-_clip10.x;
_clip6.y = 300;
_clip6.alpha = 1;
_clip6.scaleY = Math.abs(_clip6.scaleY);
ay4 = vy4 = 0;
phish4BeenHit = false;
var missleDisappear1 = new MissleDisappear(_clip11,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear2 = new MissleDisappear(_clip12,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear3 = new MissleDisappear(_clip13,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear4 = new MissleDisappear(_clip14,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear5 = new MissleDisappear(_clip15,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear6 = new MissleDisappear(_clip16,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear7 = new MissleDisappear(_clip17,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear8 = new MissleDisappear(_clip18,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear9 = new MissleDisappear(_clip19,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear10 = new MissleDisappear(_clip20,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear11 = new MissleDisappear(_clip21,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear12 = new MissleDisappear(_clip22,_clip3,_clip4,_clip5,_clip6,_clip10);I would approach it in much the same way as you would in java, by making getters and setters for all of your class variables.
Getters being for returning the values, Setters being for setting them.
So you would make a get function for the variable you want to access ala:
function get1PhishBeenHit():boolean {
return this.phish1BeenHit;
Then to access the value of that variable from outwith the class:
var result:boolean = ClassInstanceName.get1PhishBeenHit(); -
How to kill one class from another class
I need to dipose one class from another class.
So that first i have to find what are all threads running in that class and then to kill them
Assist me.Subbu_Srinivasan wrote:
I am explaining you in clear way
No you haven't been.
>
In my application i am handling many JInternalFrame.Simultaneously i am running working on more than one frame.
Due to some poor performance of some thread in one JInternalFrame,the thread is keeps on running .
i could not able to proceed further on that screen.
So i have to kill that JInternalFrame.Yoinks.
To be begin with your problem sounds like you are doing everything in one thread. So stop doing that. Second when you get it split up and if a task is taking too much time then interrupt it. No kill. Interrupt. This means the worker thread needs to check sometimes if it has been interrupted. -
Access data of one class from another class
Hi,
I am creating one class say ClassA with some data members,the same class has main() method on execution of which the data members will b assigned a value.
now i have another class say ClassB with main() method and i want to use the data in ClassA in ClassB do i have any way by which i can have access to that data.
The instance of ClassA created in ClassB is not showing any values in data members.
Can u help me find a solution for this.
Thank you.
Parag.I have tried by making one data member public so that it can have direct access from other class.But it shows null value.
The problem is that ClassA class data members are assigned values when it completes the execution of function main() so does it retains the values.
c sample code below.
public classA{
int a,b;
p s v m(String [] args)
setab();
public void setab()
//set values of a and b by doing some manipulations.
public classB{
p s v m(string []args)
classA aclass = new classA();
/* now what should i do to access the values of a & b in
aclass object*/
i strictly need to follow this way do i have a way out. -
How to add objects to panel in one class from another class
Hi this is what i am trying to do. I have a drag and adrop tool working where the users and select objects on a small panel and drag them to another panel called the tpan. What i want to do is create another class, which creates objects and now i want to display these objects on the tpan. So say i have a class DisplayTpan(), this class is used to display the objects which have been dragged from the small panel, and objects on this panel have mouselisteners attached, so that these objects can be moved around on the tpan. I have created another class called creatObj(), and from this class i want to add objects to the tpan. The DisplayTpan class extends a Jpanel, would this be he case for the CreateObj() class? In the CreateClass i have made a call to DisplayTpan t = new DisplayTPan();
t.add(object);
But this does not add the object to the panel, any ideas on how it should be done?
Problem number two i have is say, I have two objects created on that oanel, i now want to draw a line t connect the two objects, this is just simply a call to the drawLine function but how would it be possible to add a ,mouselistener to that line, so it can be extended moved around etc? Any help much appreciated thanks.Try to convert the PL/SQL code from Forms trigger into a PL/SQL library(.PLL),
and then attach that PLL in your forms.
Note that all Forms objects should be referenced indirectly, for example,
you have to rewrite
:B1.DEPT_CODE := :B2.DEPT_CODE;
:B3.TOTAL_AMOUNT := 100;
==>
copy('B2.DEPT_NO','B1.DEPT_NO');
copy('100','B3.TOTAL_AMOUNT');
This is the best way to share PL/SQL code among Oracle Forms. -
How to call main method in one class from another class
Suppose i have a code like this
class Demo
public static void main(String args[])
System.out.println("We are in First class");
class Demo1
public static void main(String args[])
System.out.println("We are in second class");
In the above program how to call main method in demo calss from Demo1 class......???????No, i dont know how to call other than main methods from other classes
And one more doubt i have i.e. Like in C can we see the execution of the program like how the code is being compiled step by step and how the value of the variable changes from step to step like(Add Watch)......... -
Better way of calling one class from another?
Hello once again,
I have another question for you all that you may or may not be able to help me with. I am currently implementing a theoretical algorithm in Java and have come up against a (probably very simple) problem.
� I have a Class (which I will call Class1 for the purpose of explanation) which passes an ArrayList along with a String to another class (Class2).
� Class2 then performs some �jiggery-pokery� on the ArrayList based on the value of string passed-in and the results are then passed back to Class1 (as an ArrayList ) where the whole process begins again.
� This loop continues until the ArrayList result in Class2 has < 2 elements and then the process terminates before instantiating Class1 and passing the ArrayList
I am currently doing this by instantiating an object of Class2 in the code of Class1 like so:
Class2 cl2 = new Class2();
cl2.jiggeryPokery(arrrayList, String);Also an object of Class1 in Class2( such that they will continue to loop):
Class1 cl1 = new Class1();
cl1.class1method(arrayList);I don�t have any problem with this code functioning (it does what it is supposed to do) but it doesn�t read or look like the most sensible way to do this.
Is there a less messy way (read: more OO) to do this? Sorry if this sounds like a stupid question to some of you but I�m fairly new to coding and Java � and we all have to learn somewhere!
Many thanks,
NiallIt sounds like you're trying to write a recursive function without having to use two classes (?). Something like this:
public void jiggeryPokery(ArrayList al, String s){
// first check the size of the ArrayList
if(al.size() >= 2){
// do something to the ArrayList & String to modify its contents
jiggeryPoker(al, s);
else{
System.out.println("My ArrayList now has " + String.valueOf(al.size()) + " elements");
} -
How to pass a variable from one class to another class?
Hi,
Is it possible to pass a variable from one class to another? For e.g., I need the value of int a for calculation purpose in method doB() but I get an error <identifier> expected. What does the error mean? I know, it's a very, very simple question but once I learn this, I promise to remember it forever. Thank you.
class A {
int a;
int doA() {
a = a + 1;
return a;
class B {
int b;
A r = new A();
r.a; // error: <identifier> expected. What does that mean ?
int doB() {
int c = b/a; // error: operator / cannot be applied to a
}Thank you!elaine_g wrote:
I am wondering why does (r.a) give an error outside the method? What's the reason it only works when used inside the (b/r.a) maths function? This is illegal syntax:
class B {
int b;
A r = new A();
r.a; //syntax error
}Why? Class definition restricts what you can define within a class to a few things:
class X {
Y y = new Y(); //defining a field -- okay
public X() { //defining a constructor -- okay
void f() { //defining a method -- okay
}... and a few other things, but you can't just write "r.a" there. It also makes no sense -- that expression by itself just accesses a field and does nothing with it -- why bother?
This is also illegal syntax:
int doB() {
A r = new A();
r.a; // error: not a statement
}Again, all "r.a" does on its own is access a field and do nothing with it -- a "noop". Since it has no effect, writing this indicates confusion on the part of the coder, so it classified as a syntax error. There is no reason to write that. -
How to transter contents of itab from one class to another...
Hello experts,
I am currently having problems on how to transfer the contents of an itab or even
the value of a variable from one class to another. For example, I have 10 records
in it_spfli in class 1 and when I loop at it_spfli in the method of class 2 it has no records!
This is an example:
class lcl_one definition.
public section.
data: gt_spfli type table of spfli.
methods get_data.
endclass.
class lcl_one implementation.
method get_data.
select * from spfli
into table gt_spfli.
endmethod.
endclass.
class lcl_two definition inheriting from lcl_one.
public section.
methods loop_at_itab.
endclass.
class lcl_two implementation.
method loop_at_itab.
field-symbols: <fs_spfli> like line of gt_spfli.
loop at gt_spfli assigning <fs_spfli>.
write: / <fs_spfli>-carrid.
endloop.
endmethod.
endclass.
start-of-selection.
data: one type ref to lcl_one,
two type ref to lcl_two.
create object: one, two.
call method one->get_data.
call method two->loop_at_itab.
In the example above, the contents of gt_spfli in class lcl_two is empty
even though it has records in class lcl_one. Help would be appreciated.
Thanks a lot guys and take care!Hi Uwe,
It is still the same. Here is my code:
REPORT zfi_ors_sms
NO STANDARD PAGE HEADING
LINE-SIZE 255
LINE-COUNT 65
MESSAGE-ID zz.
Include program/s *
INCLUDE zun_standard_routine. " Standard Routines
INCLUDE zun_header. " Interface Header Record
INCLUDE zun_footer. " Interface Footer Record
INCLUDE zun_interface_control. " Interface Control
INCLUDE zun_external_routine. " External Routines
INCLUDE zun_globe_header. " Report header
INCLUDE zun_bdc_routine. " BDC Routine
Data dictionary table/s *
TABLES: bkpf,
rf05a,
sxpgcolist.
Selection screen *
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
PARAMETERS: p_file TYPE sxpgcolist-parameters.
SELECTION-SCREEN END OF BLOCK b1.
*/ CLASS DEFINITIONS
CLASS lcl_main DEFINITION
CLASS lcl_main DEFINITION ABSTRACT.
PUBLIC SECTION.
Structure/s *
TYPES: BEGIN OF t_itab,
rec_content(100) TYPE c,
END OF t_itab.
TYPES: BEGIN OF t_upfile,
record_id(2) TYPE c, " Record ID
rec_date(10) TYPE c, " Record Date MM/DD/YYYY
prod_line(10) TYPE c, " Product Line
acc_code(40) TYPE c, " Acc Code
description(50) TYPE c, " Description
hits(13) TYPE c, " Hits
amount(15) TYPE c, " Amount
END OF t_upfile.
Internal table/s *
DATA: gt_bdcdata TYPE STANDARD TABLE OF bdcdata,
gt_bdcmsgcoll TYPE STANDARD TABLE OF bdcmsgcoll,
gt_itab TYPE STANDARD TABLE OF t_itab,
gt_header LIKE TABLE OF interface_header,
gt_footer LIKE TABLE OF interface_footer,
gt_upfile TYPE STANDARD TABLE OF t_upfile.
Global variable/s *
DATA: gv_target TYPE rfcdisplay-rfchost,
gv_err_flag(1) TYPE n VALUE 0,
gv_input_dir(100) TYPE c
VALUE '/gt/interface/FI/ORS/inbound/',
gv_inputfile_dir(255) TYPE c,
gv_eof_flag TYPE c VALUE 'N',
gv_string TYPE string,
gv_delimiter TYPE x VALUE '09',
gv_input_records(3) TYPE n,
gv_input_file_ctr(6) TYPE n,
gv_proc_tot_amt(14) TYPE p DECIMALS 2,
gv_prg_message TYPE string,
gv_gjahr TYPE bkpf-gjahr,
gv_monat TYPE bsis-monat.
Work area/s *
DATA: wa_itab LIKE LINE OF gt_itab,
wa_upfile LIKE LINE OF gt_upfile,
wa_footer LIKE LINE OF gt_footer,
wa_header LIKE LINE OF gt_header.
ENDCLASS.
CLASS lcl_read_app_server_file DEFINITION
CLASS lcl_read_app_server_file DEFINITION INHERITING FROM lcl_main.
PUBLIC SECTION.
METHODS: read_app_server_file,
read_input_file,
split_header,
process_upload_file,
split_string,
conv_num CHANGING value(amount) TYPE t_upfile-amount,
split_footer,
update_batch_control,
process_data.
ENDCLASS.
CLASS lcl_process_data DEFINITION
CLASS lcl_process_data DEFINITION INHERITING FROM
lcl_read_app_server_file.
PUBLIC SECTION.
METHODS process_data REDEFINITION.
ENDCLASS.
*/ CLASS IMPLEMENTATIONS
CLASS lcl_read_app_server_file IMPLEMENTATION
CLASS lcl_read_app_server_file IMPLEMENTATION.
*/ METHOD read_app_server_file - MAIN METHOD
METHOD read_app_server_file.
gv_target = sy-host.
PERFORM file_copy USING 'ZPPDCP' p_file 'HP-UX'
gv_target CHANGING gv_err_flag.
CONCATENATE gv_input_dir p_file INTO gv_inputfile_dir.
open application server file
PERFORM open_file USING gv_inputfile_dir 'INPUT'
CHANGING gv_err_flag.
WHILE gv_eof_flag = 'N'.
READ DATASET gv_inputfile_dir INTO wa_itab.
APPEND wa_itab TO gt_itab.
IF sy-subrc <> 0.
gv_eof_flag = 'Y'.
EXIT.
ENDIF.
CALL METHOD me->read_input_file.
ENDWHILE.
close application file server
PERFORM close_file USING gv_inputfile_dir.
IF wa_footer-total_no_rec <> gv_input_file_ctr.
MOVE 'Header Control on Number of Records is Invalid' TO
gv_prg_message.
PERFORM call_ws_message USING 'E' gv_prg_message 'Error'.
gv_err_flag = 1.
ELSEIF wa_footer-total_no_rec EQ 0 AND gv_input_file_ctr EQ 0.
MOVE 'Input File is Empty. Batch Control will be Updated' TO
gv_prg_message.
PERFORM call_ws_message USING 'I' gv_prg_message 'Information'.
CALL METHOD me->update_batch_control.
gv_err_flag = 1.
ENDIF.
IF gv_err_flag <> 1.
IF wa_footer-total_amount <> gv_proc_tot_amt.
MOVE 'Header Control on Amount is Invalid' TO gv_prg_message.
PERFORM call_ws_message USING 'E' gv_prg_message 'Error'.
gv_err_flag = 1.
ENDIF.
ENDIF.
ENDMETHOD.
*/ METHOD read_input_file
METHOD read_input_file.
CASE wa_itab-rec_content+0(2).
WHEN '00'.
CALL METHOD me->split_header.
WHEN '01'.
CALL METHOD me->process_upload_file.
ADD 1 TO gv_input_file_ctr.
ADD wa_upfile-amount TO gv_proc_tot_amt.
WHEN '99'.
CALL METHOD me->split_footer.
WHEN OTHERS.
gv_err_flag = 1.
ENDCASE.
ENDMETHOD.
*/ METHOD split_header
METHOD split_header.
CLEAR: wa_header,
gv_string.
MOVE wa_itab TO gv_string.
SPLIT gv_string AT gv_delimiter INTO
wa_header-record_id
wa_header-from_system
wa_header-to_system
wa_header-event
wa_header-batch_no
wa_header-date
wa_header-time.
APPEND wa_header TO gt_header.
ENDMETHOD.
*/ METHOD process_upload_file
METHOD process_upload_file.
CLEAR gv_string.
ADD 1 TO gv_input_records.
MOVE wa_itab-rec_content TO gv_string.
CALL METHOD me->split_string.
CALL METHOD me->conv_num CHANGING amount = wa_upfile-amount.
APPEND wa_upfile TO gt_upfile.
ENDMETHOD.
*/ METHOD split_string
METHOD split_string.
CLEAR wa_upfile.
SPLIT gv_string AT gv_delimiter INTO
wa_upfile-record_id
wa_upfile-rec_date
wa_upfile-prod_line
wa_upfile-acc_code
wa_upfile-description
wa_upfile-hits
wa_upfile-amount.
ENDMETHOD.
*/ METHOD conv_num
METHOD conv_num.
DO.
REPLACE gv_delimiter WITH ' ' INTO amount.
IF sy-subrc <> 0.
EXIT.
ENDIF.
ENDDO.
ENDMETHOD.
*/ METHOD split_footer
METHOD split_footer.
CLEAR: wa_footer,
gv_string.
MOVE wa_itab TO gv_string.
SPLIT gv_string AT gv_delimiter INTO
wa_footer-record_id
wa_footer-total_no_rec
wa_footer-total_amount.
CALL METHOD me->conv_num CHANGING amount = wa_footer-total_amount.
APPEND wa_footer TO gt_footer.
ENDMETHOD.
*/ METHOD update_batch_control
METHOD update_batch_control.
DATA: lv_sys_date TYPE sy-datum,
lv_sys_time TYPE sy-uzeit,
lv_temp_date(10) TYPE c.
CONCATENATE wa_header-date4(4) wa_header-date2(2)
wa_header-date+0(2)
INTO lv_temp_date.
MOVE lv_temp_date TO wa_header-date.
APPEND wa_header-date TO gt_header.
Update ZTF0001 Table
PERFORM check_interface_header USING wa_header 'U' 'GLOB'
CHANGING gv_err_flag.
Archive files
PERFORM archive_files USING 'ZPPDARC' gv_inputfile_dir 'HP-UX'
gv_target CHANGING gv_err_flag.
ENDMETHOD.
METHOD process_data.
SORT gt_upfile ASCENDING.
CLEAR wa_upfile.
READ TABLE gt_upfile INDEX 1 INTO wa_upfile.
IF sy-subrc = 0.
MOVE: wa_upfile-rec_date+6(4) TO gv_gjahr,
wa_upfile-rec_date+0(2) TO gv_monat.
ENDIF.
ENDMETHOD.
ENDCLASS.
CLASS lcl_process_data IMPLEMENTATION
CLASS lcl_process_data IMPLEMENTATION.
METHOD process_data.
CALL METHOD super->process_data.
IF NOT gt_upfile[] IS INITIAL.
ENDIF.
ENDMETHOD.
ENDCLASS.
Start of selection *
START-OF-SELECTION.
DATA: read TYPE REF TO lcl_read_app_server_file,
process TYPE REF TO lcl_process_data.
CREATE OBJECT: read, process.
CALL METHOD read->read_app_server_file.
CALL METHOD process->process_data. -
Transfering text from one class to another
Hi, I'm having a lot of trouble with getting the text from a textArea in a frame to transfer from one class to another.
I could really use any help given.
Thanks
Here's where the text should come from
import javax.swing.*;
import BreezySwing.*;
import java.util.*;
public class UserFrame extends GBFrame {
//String Design = null;
private
JTextArea InputArea = addTextArea
("...",1,1,1,1);
JButton drawButton = addButton
("Draw" ,3,1,1,1);
// UserPanel dPanel = new UserPanel();
GraphicsInputPanel dPanel = new GraphicsInputPanel();
GBPanel panel = addPanel(dPanel, 1, 2, 1, 1);
public void buttonClicked (JButton buttonObj){
GraphicsInputPanel.setdesign(InputArea.getText());
// rbPanel setDesign(graphicCodeArea.getText());
public static void main(String[] args) {
UserFrame tpo = new UserFrame();
tpo.setSize(400, 300);
tpo.setVisible(true);
and here's where it should be going
import BreezySwing.*;
import java.awt.*;
import java.util.*;
public class GraphicsInputPanel extends GBPanel{
String design;
public void setdesign (String d){
design = d;
public void paintComponent (Graphics g){
super.paintComponent(g);
StringTokenizer lines = new StringTokenizer(design, "\n");
while (lines.hasMoreTokens()){
String line = lines.nextToken();
if (design.equals ("Blue")){
g.setColor(Color.blue);
}else if (design.equals("Green")){
g.setColor(Color.green);
g.fillRect(0,0,100,100);
public void setDesign(String d){
design = d;
repaint();
}Hello Saqib,
The requirement to transfer asset with value date in the past year contradict the objective of audit trail established in the system although it is technically possible to do. Perhaps you should convince your client to adopt the standard approach, i.e. value date as at the date of asset transfer.
Kind regards,
John Chin -
Fire event from one class to another.
I have a Login JFrame class that allows users to enter username and password. I then have another JFrame class which will monitor when someone logs in. I am trying to get the username and password to appear on the monitor login frame text area when the user presses enter on the login frame.
I can get it ot work by passing the Monitor class into the Login classes constructor but I want to be able to open the classes separately.When I try to open separatley at present I get java.lang.NullPointerException
at project.LoginGUI.actionPerformed(LoginGUI.java:70) which is referring to the following code:
if(listen.equals("OK")){
GymMonitor.username.setText(username.getText());
Both classes are in the same package. What I want to know is how to fire an event from one class to another? when the class you are firing to is constructed separately.
I hope this question is not too verbose.
ThanksGenerally for something like this you would use a listener.
Your login window is its own entity--it has a user interface, and it gets some information which someone else could ask it for. It could even generate its own events, such as when the user presses "OK". You would first define an interface for anyone who wants to know when someone logs in:
public interface ILoginListener extends java.util.EventListener
public void login(LoginEvent event);
}You would then define the LoginEvent class to contain information like what the user entered for username and password. You could give your login dialog a couple of methods:
private Vector myListeners = new Vector();
public void addLoginListener(ILoginListener listener) {
myListeners.add(listener);
public void removeLoginListener(ILoginListener listener) {
myListeners.remove(listener);
protected void fireLogin(LoginEvent event) {
for (Iterator it = myListeners.iterator(); it.hasNext(); ) {
ILoginListener listener = (ILoginListener)it.next();
listener.login(event);
}You'd have your login dialog call fireLogin every time the user logged in.
Then, you could implement ILoginListener in your monitor window:
public void login(LoginEvent event) {
// now do something with the event you just got.
}All the code I put in here is really generic stuff. You'll write this kind of stuff hundreds of times probably during your career. I haven't tested it though.
Hope this helps. :) -
Calling a drawLine() from one class to another from an ActionEvent
I have several JPanel objects called and placed on a JFrame. The JFrame has a RadioButton group with radio buttons. If I select a radio button and call a drawLine() method from a JPanel, I receive a "NullPointerException". Is it not possible to call this graphic method from one class to another?
Thanks for any input you can provide.
JohnRemember that each panel draws it's own current state. So you need the ActionPerformed to change the state in your target panel.
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
public class PanelComm extends JPanel {
private SubPanelOne subPanelOne = new SubPanelOne();
private SubPanelTwo subPanelTwo = new SubPanelTwo();
public class SubPanelOne extends JPanel {
public SubPanelOne () {
setLayout ( new BorderLayout() );
setBorder ( BorderFactory.createTitledBorder ( "SubPanel One" ) );
Reactor reactor = new Reactor();
ButtonGroup group = new ButtonGroup();
JPanel radioPanel = new JPanel(new GridLayout(0, 1));
JRadioButton buttonOne = new JRadioButton ( "One" );
buttonOne.addActionListener ( reactor );
group.add ( buttonOne );
radioPanel.add ( buttonOne );
JRadioButton buttonTwo = new JRadioButton ( "Two" );
buttonTwo.addActionListener ( reactor );
group.add ( buttonTwo );
radioPanel.add ( buttonTwo );
JRadioButton buttonThree = new JRadioButton ( "Three" );
buttonThree.addActionListener ( reactor );
group.add ( buttonThree );
radioPanel.add ( buttonThree );
add ( radioPanel ,BorderLayout.LINE_START );
protected void paintComponent ( Graphics _g ) {
super.paintComponent ( _g );
Graphics2D g = (Graphics2D)_g;
g.setRenderingHint ( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
public class SubPanelTwo extends JPanel {
private JLabel text = new JLabel();
public SubPanelTwo () {
setLayout ( new BorderLayout() );
setBorder ( BorderFactory.createTitledBorder ( "SubPanel Two" ) );
text.setFont ( new Font ( "Verdana" ,Font.PLAIN ,30 ) );
text.setHorizontalAlignment ( JLabel.CENTER );
add ( text ,BorderLayout.CENTER );
protected void paintComponent ( Graphics _g ) {
super.paintComponent ( _g );
Graphics2D g = (Graphics2D)_g;
g.setRenderingHint ( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
public void setChoice ( String cmd ) {
text.setText ( cmd );
public class Reactor implements ActionListener {
public void actionPerformed ( ActionEvent e ) {
subPanelTwo.setChoice ( e.getActionCommand() );
public PanelComm () {
setLayout ( new GridLayout ( 1 ,2 ) );
add ( subPanelOne );
add ( subPanelTwo );
// main
public static void main ( String[] args ) {
JFrame f = new JFrame ( "Panel Communication" );
f.setDefaultCloseOperation ( JFrame.EXIT_ON_CLOSE );
f.getContentPane().add ( new PanelComm() ,BorderLayout.CENTER );
f.setSize ( 320 ,120 );
f.setVisible ( true );
} // main
} -
Moving a method from one class to another issues
Hi, im new. Let me explain what i am trying to achieve. I am basically trying to move a method from one class to another in order to refactor the code. However every time i do, the program stops working and i am struggling. I have literally tried 30 times these last two days. Can some one help please? If shown once i should be ok, i pick up quickly.
Help would seriously be appreciated.
Class trying to move from, given that this is an extraction:
class GACanvas extends Panel implements ActionListener, Runnable {
private WorldMenuItems speedMenuItems, designMenuItemsPlantGrowth, designMenuItemsPlantCount;
private WorldMenuItems designMenuItemsPlantEaten, designMenuItemsApproximatePopulation;
private WorldMenuItems designMenuItemsEatersBorn,designMenuItemsMutationProbability;
private WorldMenuItems designMenuItemsCrossoverProbability;
MenuBar getMenuBar() {
menuBar = new MenuBar();
addControlItemsToMenuBar();
addSpeedItemsToMenuBar();
addWorldDesignItemsToMenuBar();
return menuBar;
This is the method i am trying to move (below)
public void itemsInsideWorldDesignMenu() {
designMenuItemsPlantGrowth = new WorldMenuItems("Plants Grow",
new String[] { "In Rows", "In Clumps", "At Random",
"Along the Bottom", "Along the Edges" }, 1);
designMenuItemsPlantCount = new WorldMenuItems("Number Of Plants",
new String[] { "50", "100", "150", "250", "500" }, 3);
designMenuItemsPlantEaten = new WorldMenuItems("When a Plant is Eaten",
new String[] { "It grows back somewhere",
"It grows back nearby", "It's Gone" }, 0);
designMenuItemsApproximatePopulation = new WorldMenuItems(
"Approximate Population", new String[] { "10", "20", "25",
"30", "40", "50", "75", "100" }, 2);
designMenuItemsEatersBorn = new WorldMenuItems("Eaters are Born",
new String[] { "At the Center", "In a Corner",
"At Random Location", "At Parent's Location" }, 2);
designMenuItemsMutationProbability = new WorldMenuItems(
"Mutation Probability", new String[] { "Zero", "0.25%", "0.5%",
"1%", "2%", "3%", "5%", "10%" }, 3);
designMenuItemsCrossoverProbability = new WorldMenuItems(
"Crossover Probability", new String[] { "Zero", "10%", "25%",
"50%", "75%", "100%" }, 4);
Class Trying to move to:
class WorldMenuItems extends Menu implements ItemListener {
private CheckboxMenuItem[] items;
private int selectedIndex = -1;
WorldMenuItems(String menuName, String[] itemNames) {
this(menuName, itemNames, -1);
WorldMenuItems(String menuName, String[] itemNames, int selected) {
super(menuName);
items = new CheckboxMenuItem[itemNames.length];
for (int i = 0; i < itemNames.length; i++) {
items[i] = new CheckboxMenuItem(itemNames);
add(items[i]);
items[i].addItemListener(this);
selectedIndex = selected;
if (selectedIndex < 0 || selectedIndex >= items.length)
selectedIndex = 1;
items[selectedIndex].setState(true);
public int getSelectedIndex() {
return selectedIndex;
public void itemStateChanged(ItemEvent evt) { // This works on other systems
CheckboxMenuItem newSelection = (CheckboxMenuItem)evt.getSource();
for (int i = 0; i < items.length; i++) {
if (newSelection == items[i]) {
items[selectedIndex].setState(false);
selectedIndex = i;
newSelection.setState(true);
return;Ok i've done this. I am getting an error on the line specified. Can someone help me out and tell me what i need to do?
GACanvas
//IM GETTING AN ERROR ON THIS LINE UNDER NAME, SAYING IT IS NOT VISIBLE
WorldMenuItems worldmenuitems = new WorldMenuItems(name, null);
public MenuBar getMenuBar() {
menuBar = new MenuBar();
addControlItemsToMenuBar();
addSpeedItemsToMenuBar();
worldmenuitems.addWorldDesignItemsToMenuBar();
return menuBar;
class WorldMenuItems extends Menu implements ItemListener {
private WorldMenuItems speedMenuItems, designMenuItemsPlantGrowth, designMenuItemsPlantCount;
private WorldMenuItems designMenuItemsPlantEaten, designMenuItemsApproximatePopulation;
private WorldMenuItems designMenuItemsEatersBorn,designMenuItemsMutationProbability;
private WorldMenuItems designMenuItemsCrossoverProbability;
GACanvas gacanvas = new GACanvas(null);
private CheckboxMenuItem[] items;
private int selectedIndex = -1;
WorldMenuItems(String menuName, String[] itemNames) {
this(menuName, itemNames, -1);
WorldMenuItems(String menuName, String[] itemNames, int selected) {
super(menuName);
items = new CheckboxMenuItem[itemNames.length];
for (int i = 0; i < itemNames.length; i++) {
items[i] = new CheckboxMenuItem(itemNames);
add(items[i]);
items[i].addItemListener(this);
selectedIndex = selected;
if (selectedIndex < 0 || selectedIndex >= items.length)
selectedIndex = 1;
items[selectedIndex].setState(true);
public int getSelectedIndex() {
return selectedIndex;
public void itemStateChanged(ItemEvent evt) { // This works on other systems
CheckboxMenuItem newSelection = (CheckboxMenuItem)evt.getSource();
for (int i = 0; i < items.length; i++) {
if (newSelection == items[i]) {
items[selectedIndex].setState(false);
selectedIndex = i;
newSelection.setState(true);
return;
public void itemsInsideWorldDesignMenu() {
designMenuItemsPlantGrowth = new WorldMenuItems("Plants Grow",
new String[] { "In Rows", "In Clumps", "At Random",
"Along the Bottom", "Along the Edges" }, 1);
designMenuItemsPlantCount = new WorldMenuItems("Number Of Plants",
new String[] { "50", "100", "150", "250", "500" }, 3);
designMenuItemsPlantEaten = new WorldMenuItems("When a Plant is Eaten",
new String[] { "It grows back somewhere",
"It grows back nearby", "It's Gone" }, 0);
designMenuItemsApproximatePopulation = new WorldMenuItems(
"Approximate Population", new String[] { "10", "20", "25",
"30", "40", "50", "75", "100" }, 2);
designMenuItemsEatersBorn = new WorldMenuItems("Eaters are Born",
new String[] { "At the Center", "In a Corner",
"At Random Location", "At Parent's Location" }, 2);
designMenuItemsMutationProbability = new WorldMenuItems(
"Mutation Probability", new String[] { "Zero", "0.25%", "0.5%",
"1%", "2%", "3%", "5%", "10%" }, 3);
designMenuItemsCrossoverProbability = new WorldMenuItems(
"Crossover Probability", new String[] { "Zero", "10%", "25%",
"50%", "75%", "100%" }, 4);
public void addWorldDesignItemsToMenuBar() {
gacanvas = new GACanvas(null);
itemsInsideWorldDesignMenu();
Menu designMenuItems = new Menu("WorldDesign");
designMenuItems.add(designMenuItemsPlantGrowth);
designMenuItems.add(designMenuItemsPlantCount);
designMenuItems.add(designMenuItemsPlantEaten);
designMenuItems.add(designMenuItemsApproximatePopulation);
designMenuItems.add(designMenuItemsEatersBorn);
designMenuItems.add(designMenuItemsMutationProbability);
designMenuItems.add(designMenuItemsCrossoverProbability);
gacanvas.menuBar.add(designMenuItems); -
Moving Variable from one class to another.
I need to get a Variable from one class to another how would I do this?
Well this is a very tipical scehario for every enterprise application. You always create logger classes that generate log files for your application, as that is the only way to track errors in your system when its in the production enviorment.
Just create a simple class that acts as the Logger, and have a method in it that accepts a variable of the type that you are are trying to pass; most commonly a String; but can be overloaded to accept constom classes. e.g.
class Logger
public void log(String message)
writeToFile("< " + new Date() + " > " + message);
public void log(CustomClass queueEvent)
log("queue message was: " + queueEvent.getMessage() + " at: " + queueEven.getEventTime());
}Hope this makes things clearer
Regards
Omer
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