How to write contents of an ArrayList to JTable

I have an ArrayList named 'innercell'. It contains the following contents
cs123, 0.34567
cs234, 0.5673
cs234,cs456, 0.5674
this arraylist is added to another arraylist 'cells'
cells.add(innercell);
now the contents of the 'cells' arraylist is
cs123, 0.34567
cs234, 0.5673
cs234,cs456, 0.5674
i have created a JTable and its variable name is 'jtable' (object) (*i'm using NetBeans IDE 6.0*)
and the model of this JTable is as below (it is the generated code by NetBeans IDE 6.0)
jtable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null},
{null, null},
{null, null},
{null, null},
{null, null},
{null, null},
{null, null},
{null, null},
{null, null}
new String [] {
"Title 1", "Title 2"
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
i have only 2 columns in the table, and 9 rows
now i want 2 place contents of 'cells' arraylist to JTable as below
Tittle 1 Title 2
cs123 0.34567
cs234 0.5673
cs234,cs456 0.5674
to write in this form i'm using following code
String[] columnNames={"Title 1","Title 2"};
Object[][] rowdata=new Object[9][2];
str=items;//items is the string value.the possible 'items' values {cs123,...}
sup=value;//value is the double value. the possible 'value' are {0.5674,......}.i'm not given how i'm geting these values
for(int k=0;k<2;k++){
if(k==0)
rowdata[i][k]=str;
else
rowdata[i][k]=sup;
jtable=new JTable(rowdata,columnNames);//is this statement is right to add the contents of arraylist to the table?
jtable.setVisible(true);
but it is not working....i'm getting "NullPointerException"

Swing related questions should be posted in the Swing forum.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting], so the posted code retains its original formatting.
Don't use an IDE to generate your code. Learn how to write your own code. Its hard enough to learn how to use Java without learning how to use the IDE as well.
Use the DefaultTableModel. You can build the model using Vectors or Arrays or by adding individuals rows of data to the model. There is no need to create a custom TableModel.

Similar Messages

How to add contents of an arrayList to a JList

Hi,
I am trying to figure out how to add the contents of an arraylist to a Jlist.
Basically I have 3 classes which are as follow:
1. AuctionItems(String name, int bid) which represents an item in auction
2. AuctionItemsFactory which creates AuctionItems and adds them to an arraylist called stock
3. AuctionBidsGui1 which is the interface where the user can see the items in the auction and select them from a JList.
But I dont know how to read the contents of the stock(arraylist) into the JList which is in AuctionBidsGui1. Below are the 3 classes mentioned above
public class AuctionItems {
     String name;
     int bid;
     public AuctionItems(){
          name = null;
          bid = 0;
     public AuctionItems(String name, int bid){
          this.name = name;
          this.bid = bid;
     public String getName(){
          return name;
     public int getBid() {
          return bid;
public class AuctionItemsFactory {
     private ArrayList<AuctionItems> stock;
     int size;
     public AuctionItemsFactory() {
          stock = new ArrayList<AuctionItems>();
     public void addItems(AuctionItems item) {
          stock.add(item);
//removes last element of the arrayList
     public void removeItems() {
          int n = stock.size() - 1;
          stock.remove(n);
     public void printNumOfItems() {
          int n = stock.size();
          System.out.println(n);
     public int numberOfItems(){
          return stock.size();
     public void printItems(){
          for (AuctionItems item : stock) System.out.println(item);
and this one is a small part of the AuctionBidsGui1 class which represents the JList where the list of the items will go.
public void addItemListWidgets() {
          itemsList = new JList();
          itemsList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
          itemsList.setLayoutOrientation(JList.VERTICAL);
          itemsList.setVisibleRowCount(10);
          itemsList.setSelectedIndex(0);
          JScrollPane itemsListScroller = new JScrollPane(itemsList); // put the list in the scroller
          itemsListScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
          itemsListScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
          itemsListPanel.add(itemsListScroller);
     }

I know that I have to use the toArray() but i dont know what type of method to use for this because i will need to implement a method in my AuctionItemsFactory class which will copy the contents of the arraylist into an array so then i can call this methos from my AuctionBidGui1 class.
I would appreciate if you could give me a bit more hints.

How to write content of the file under folder

Hi Experts,
I have following scenario, I have list of files under folder in local desktop(for eg D:\mani)
I have only filename, using this filename i want to search and get content of the particular file and write in some other location? how to do that? give your suggestions?
Regards,
P.Manivannan

You could go two ways here:
The first possibility requires that (a) you know what operating system you are working with, and (b) you only need to copy the file, and not do anything else with the contents of it. In this case, probably the easiest way to do this is to use a Runtime exec command for the file you want to copy:
java.lang.Runtime.getRuntime().exec( "cp D:\mani D:\mani2" );Otherwise, if you need your code to be portable, you can't assume anything about the operating system. Since java.io.File doesn't provide a copy method, you will need to read the entire contents of the file into the vm, and then write them out to a new file. Also, if you need to use the contents of your file in some other way, as well, then you also need to read the entire contents into the vm. In this second case, how you read the file may depend on what kind of data the file contains.
In general, the following code should work for you:
final FileInputSteam fis = new FileInputStream ( new File( "D:\mani" ) );
final FileOutputStream fos = new FileOutputStream( new File( "D:\mani2" ) );
final byte [] buf = new byte[ 1024 ];
int bytesRead;
while ( ( bytesRead = fis.read( buf ) ) != 0 )
fos.write( buf, 0, bytesRead );Don't forget to catch or throw IOException.
Hope this helps.
- Adam

How to write contents of one file to another file

We have some file Recon80 (RECON80HB01141005.TXT) which need to be modified . i.e we need to add 2 more columns in the file and write the file record into other file with trailer information. Please suggest to accomplish along with code snippet in SSIS 2008.
PFA

Easiest way is to use script task to add header and footer information.
http://agilebi.com/jwelch/2008/02/08/adding-headers-and-footers-to-flat-files/
Please Mark This As Answer if it solved your issue
Please Mark This As Helpful if it helps to solve your issue
Visakh
My MSDN Page
My Personal Blog
My Facebook Page

How to write the JTables Content into the CSV File.

Hi Friends
I managed to write the Database records into the CSV Files. Now i would like to add the JTables contend into the CSV Files.
I just add the Code which Used to write the Database records into the CSV Files.
void exportApi()throws Exception
          try
               PrintWriter writing= new PrintWriter(new FileWriter("Report.csv"));
               System.out.println("Connected");
               stexport=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
               rsexport=stexport.executeQuery("Select * from IssuedBook ");
               ResultSetMetaData md = rsexport.getMetaData();
               int columns = md.getColumnCount();
               String fieldNames[]={"No","Name","Author","Date","Id","Issued","Return"};
               //write fields names
               String rec = "";
               for (int i=0; i < fieldNames.length; i++)
                    rec +='\"'+fieldNames[i]+'\"';
                    rec+=",";
               if (rec.endsWith(",")) rec=rec.substring(0, (rec.length()-1));
               writing.println(rec);
               //write values from result set to file
                rsexport.beforeFirst();
               while(rsexport.next())
                    rec = "";
                     for (int i=1; i < (columns+1); i++)
                         try
                                rec +="\""+rsexport.getString(i)+"\",";
                                rec +="\""+rsexport.getInt(i)+"\",";
                         catch(SQLException sqle)
                              // I would add this System.out.println("Exception in retrieval in for loop:\n"+sqle);
                     if (rec.endsWith(",")) rec=rec.substring(0,(rec.length()-1));
                    writing.println(rec);
               writing.close();
     }With this Same code how to Write the JTable content into the CSV Files.
Please tell me how to implement this.
Thank you for your Service
Jofin

Hi Friends
I just modified my code and tried according to your suggestion. But here it does not print the records inside CSV File. But when i use ResultSet it prints the Records inside the CSV. Now i want to Display only the JTable content.
I am posting my code here. Please run this code and find the Report.csv file in your current Directory. and please help me to come out of this Problem.
import javax.swing.*;
import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
public class Exporting extends JDialog implements ActionListener
     private JRadioButton rby,rbn,rbr,rbnore,rbnorest;
     private ButtonGroup bg;
     private JPanel exportpanel;
     private JButton btnExpots;
     FileReader reading=null;
     FileWriter writing=null;
     JTable table;
     JScrollPane scroll;
     public Exporting()throws Exception
          setSize(550,450);
          setTitle("Export Results");
          this.setLocation(100,100);
          String Heading[]={"BOOK ID","NAME","AUTHOR","PRICE"};
          String records[][]={{"B0201","JAVA PROGRAMING","JAMES","1234.00"},
                           {"B0202","SERVLET PROGRAMING","GOSLIN","1425.00"},
                           {"B0203","PHP DEVELOPMENT","SUNITHA","123"},
                           {"B0204","PRIAM","SELVI","1354"},
                           {"B0205","JAVA PROGRAMING","JAMES","1234.00"},
                           {"B0206","SERVLET PROGRAMING","GOSLIN","1425.00"},
                           {"B0207","PHP DEVELOPMENT","SUNITHA","123"},
                           {"B0208","PRIAM","SELVI","1354"}};
          btnExpots= new JButton("Export");
          btnExpots.addActionListener(this);
          btnExpots.setBounds(140,200,60,25);
          table = new JTable();
          scroll=new JScrollPane(table);
          ((DefaultTableModel)table.getModel()).setDataVector(records,Heading);
          System.out.println(table.getModel());
          exportpanel= new JPanel();
          exportpanel.add(btnExpots,BorderLayout.SOUTH);
          exportpanel.add(scroll);
          getContentPane().add(exportpanel);
          setVisible(true);
      public void actionPerformed(ActionEvent ae)
          Object obj=ae.getSource();
          try {
          PrintWriter writing= new PrintWriter(new FileWriter("Report.csv"));
          if(obj==btnExpots)
               for(int row=0;row<table.getRowCount();++row)
                         for(int col=0;col<table.getColumnCount();++col)
                              Object ob=table.getValueAt(row,col);
                              //exportApi(ob);
                              System.out.println(ob);
                              System.out.println("Connected");
                              String fieldNames[]={"BOOK ID","NAME","AUTHOR","PRICE"};
                              String rec = "";
                              for (int i=0; i <fieldNames.length; i++)
                                   rec +='\"'+fieldNames[i]+'\"';
                                   rec+=",";
                              if (rec.endsWith(",")) rec=rec.substring(0, (rec.length()-1));
                              writing.println(rec);
                              //write values from result set to file
                               rec +="\""+ob+"\",";
                               if (rec.endsWith(",")) rec=rec.substring(0,(rec.length()-1));
                               writing.println(rec);
                               writing.close();
     catch(Exception ex)
          ex.printStackTrace();
     public static void main(String arg[]) throws Exception
          Exporting ex= new Exporting();
}Could anyone Please modify my code and help me out.
Thank you for your service
Cheers
Jofin

I am new in indesign scripting, please tell me how to write a script to get content of a element in xml and then sort all the content

I am new in indesign scripting, please tell me how to write a script to get content of a element in xml and then sort all the content

Hi,
May the below code is useful for you, but I dont know how to sort.
Edit the tag as per your job request.
alert(app.activeDocument.xmlElements[0].contents)
//Second alert
var xe = app.activeDocument.xmlElements[0].evaluateXPathExpression("//marginalnote");
alert(xe.length)
for(i=0; i<xe.length; i++)
alert(xe[i].texts[0].contents)
Regards
Siraj

How to write program to list the system directory(content of pc)

how to write a program that will display all the folder n directory of the pc like:
+My Computer
+c:
+d:

Copy this line and save it in a file named "dirlist.bat":
for %%* in (%1) do dir /b %2 %1To use it, change to the directory it's in and at the command prompt type
dirlist directory [/s] directory is the name of the directory that you want listed.
/s is optional and will list the contents of all subdirectories also.
(You didn't say it had to be Java - use the right tool for the job)

How to write an element in a JTable Cell

Probably it's a stupid question but I have this problem:
I have a the necessity to build a JTable in which, when I edit a cell and I push a keyboard button, a new Frame opens to edit the content of the cell.
But the problem is how to write something in the JTable cell, before setting its model. Because, I know, setCellAT() method of JTree inserts the value in the model and not in the table view. And repainting doesn't function!
What to do??
Thanks

Hi there
Depending on your table model you should normally change the "cell value" of the tablemodel.
This could look like:
JTable table = new JTable();
TableModel model = table.getModel();
int rowIndex = 0, columnIndex = 0;
model.setValueAt("This is a test", rowIndex, columnIndex);
The tablemodel should then fire an event to the view (i.e. JTable) and the table should be updated.
Hope this helps you

How to write the folder path in standard webi report - Most Accessed Documents

How to write the folder path in standard webi report - Most Accessed Documents
All
   -> Public Folders
                  -> Auditor
                  -> ABCD
I want to give path of folder 'ABCD' and all the reports/ subfolders under it?
Prompt - 'Enter the Folder Path(Add % at the end to include Sub Folders)' ?
Give me exact path syntax

Hi Daniel,
But when I give my URL as
http://serverA:80/irj/portal??NavigationTarget=ROLES://portal_content/crm-practice/14-Feb/Test_Page
I am able to access the iview but the thing is I am getting TLN,Toolarea,Masthead,etc.
I will tell my requirement,
ServerA (EP 7.0) has some iviews,pages...
I need to access these iviews from serverB(EP 6.0)....
In ServerB only the iviews has to be displayed in the content area but not TLN,Toolarea,etc.
Kindly help me in this regard.
Thanks and regards,
Purushothaman.
Message was edited by: Purushothaman Vyasarao

How to write Sync service in ABAP

Dear Experts,
              i m very new to ABAP dev, can anybody help me how to write a sync service in ABAP and how to call a function module in to that sync service.
               My requirement is i want to upload the data from the clint and download the data to client from the backend. i had written the function module to create a customer in CRM, now i want to push the data to create a customer from the client, for this i need to write a sync service for above requirement,
            plz help me out how to write a sync service.
                       Regards
                        eswar

Hi Jyotirmoy,
Check this thread for Subquery
http://help.sap.com/saphelp_nw04/helpdata/en/dc/dc7614099b11d295320000e8353423/content.htm
Correlated, non-scalar subquery:
REPORT demo_select_subquery_1.
DATA: name_tab TYPE TABLE OF scarr-carrname,
      name LIKE LINE OF name_tab.
SELECT carrname
INTO TABLE name_tab
FROM scarr
WHERE EXISTS ( select *
                   FROM spfli
                   WHERE carrid   = scarr~carrid AND
                         cityfrom = 'NEW YORK'        ).
LOOP AT name_tab INTO name.
WRITE: / name.
ENDLOOP.
This example selects all lines from database table SCARR for airlines that fly from New York.
Scalar subquery:
REPORT demo_select_subquery_2.
DATA: carr_id TYPE spfli-carrid VALUE 'LH',
      conn_id TYPE spfli-connid VALUE '0400'.
DATA: city TYPE sgeocity-city,
      lati TYPE p DECIMALS 2,
      longi TYPE p DECIMALS 2.
SELECT SINGLE city latitude longitude
INTO (city, lati, longi)
FROM sgeocity
WHERE city IN ( select cityfrom
                    FROM spfli
                    WHERE carrid = carr_id AND
                          connid = conn_id      ).
WRITE: city, lati, longi.
This example reads the latitude and longitude of the departure city of flight LH 402 from database table SGEOCITY.
Thanks,
Vinay

How to write Protect endprotect concept in Smartforms

hi
can any one suggest me
How to write Protect endprotect concept in Smartforms
i have some content to coem without break in SMARTFORM
how to do that
Thanks & Regards
kalyan
<thread moved, has nothing to do with ABAP Objects. Please choose your forums more carefully in future>
Edited by: Mike Pokraka on Sep 26, 2008 12:50 AM

Hi,
For 4.7 version if you are using tables, there are two options for protection against line break:
- You can protect a line type against page break.
- You can protect several table lines against page break for output in the main area.
Protection against page break for line types
- Double-click on your table node and choose the Table tab page.
- Switch to the detail view by choosing the Details pushbutton.
- Set the Protection against page break checkbox in the table for the relevant line type. Table lines that use this line type are output on one page.
Protection against page break for several table lines
- Expand the main area of your table node in the navigation tree.
- Insert a file node for the table lines to be protected in the main area.
- If you have already created table lines in the main area, you can put the lines that you want to protect again page break under the file using Drag&Drop. Otherwise, create the table lines as subnodes of the file.
- Choose the Output Options tab page of the file node and set the Page Protection option. All table lines that are in the file with the Page Protection option set are output on one page.
In 4.6, Alternatively in a paragraph format use the Page protection attribute to determine whether or not to display a paragraph completely on one page. Mark it if you want to avoid that a paragraph is split up by a page break. If on the current page (only in the main window) there is not enough space left for the paragraph, the entire paragraph appears on the next page.
Regards,
Himanshu Verma

How to write a file using mod pl/sql

hi,
i am having a submit button in my procedure. which should inturn create .sql file in a file path.
is there any way to create a fileusing htp and htf methods.
Thanks in advance
Hari

>
i am having a submit button in my procedure. which should in turn create .sql file in a file path.
is there any way to create a file using htp and htf methods.
>
Why are you wasting your time coding from scratch using the PL/SQL Web Toolkit instead of the APEX framework?
From Re: how to write a file using mod pl/sql it appears that you are not using APEX, so a number of the approaches APEX offers are not relevant. You appear to be looking for a file download solution using the <tt>wpg_docload.download_file</tt> method, such as:
create or replace procedure download_file (
    p_filename in     varchar2
, p_mimetype in     varchar2
, p_content   in out nocopy blob)
is
begin
-- Set up HTTP header.
-- Use "application/octet" as default MIME type.
owa_util.mime_header(nvl(p_mimetype, 'application/octet'), false);
-- Set the size so the browser knows how much to download.
htp.p('Content-length: ' || dbms_lob.getlength(p_content));
-- Filename will be used as default by the browser in "Save as..."
htp.p('Content-Disposition: attachment; filename="' || p_filename || '"');
-- Close header.
owa_util.http_header_close();
-- Stream the file content to the browser.
wpg_docload.download_file(p_content);
end download_file;

How to write data to existing file using spool command?

Hi,
I am calling a stored procedure from a shell script. This stored procedure is having a CLOB object as an OUT parameter. How to write the data in CLOB object a existing file which is there in my client system. Below is the shell and sql scripts.
Shell script
( echo "hello" ) > /root/file.txt
sqlplus -s $user/$pass@$tns @/root/proc.sql /root/file.txt << EOF
EOFSQL script
set pages 0
set trimspool off
set serveroutput off
set feedback off
set term off
set echo off
variable out CLOB
define file='&1'
begin
pack.proc(:out);
end;
spool &file
select :out from dual;
spool offThis code writes contents of the OUT variable to file.txt, but my existing data ('hello') is lost. Please help me.
I figured the it...Use append in the spool command... :)
Edited by: Balaji on Jul 19, 2012 8:55 PM

>
Hi Balaji
I figured the it...Use append in the spool command... :Please mark the thread as answered as per the FAQ.
Paul...

OSM7 how to write the xq in Order State Policy

In Order State Policy I set for
     state:In Progress Order State
     request: Cancel Order
a xq code in the Condition Transiction form, which check a xml field and return true or false base on the content, but it does not works.
Now, can I log the input of Order State Policy and how can I debug the xq?
Please helpme to undestund how to write and debug the xq code?
below my xq:
declare namespace saxon="http://saxon.sf.net/";
declare namespace xsl="http://www.w3.org/1999/XSL/Transform";
let $taskData := fn:root(.)/GetOrder.Response
let $ponr := $taskData/_root/PONR
let $ponr_value := fn:normalize-space( $ponr/text() )
return
if (fn:exists($taskData) )
then (
if ("NO" = $ponr_value) then (
true()
else (
false()
else(
     false()
input example:
<GetOrder.Response>
<_root
<PONR>NO</PONR>

So, I can debug the xq adding the line below step by step...
fn:trace($taskData, "label")
Below my final xq that I put on the policy.
declare namespace saxon="http://saxon.sf.net/";
declare namespace xsl="http://www.w3.org/1999/XSL/Transform";
let $taskData := fn:root(.)/GetOrder.Response
let $ponr := $taskData/_root/PONR
let $ponr_value := fn:normalize-space( $ponr/text() )
return
if (fn:exists($taskData) )
then (
if ( $ponr_value = "NO" ) then (
true()
else (
          fn:error(fn:QName("urn:com:metasolv:oms:xmlapi:1", "PointOfNoReturn"), "PONR reached.")
else(
     fn:error(fn:QName("urn:com:metasolv:oms:xmlapi:1", "PointOfNoReturn"), "PONR reached taskData does not exist.")
)

How to write comments for a class

hi
how to write comments for a class

I'm reeling with incredulity, and as such am unable to do anything except just post some code
// this is a single line comment
/* this is a multiline comment.
it can be spread over as many lines as you
want */Or are you asking about how to decide what the content should be?

How to write contents of an ArrayList to JTable

Similar Messages

Maybe you are looking for