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  • Blackberry read local properties file in project

    - by Dachmt
    Hi, I have a config.properties file at the root of my blackberry project (same place as Blackberry_App_Descriptor.xml file), and I try to access the file to read and write into it. See below my class: public class Configuration { private String file; private String fileName; public Configuration(String pathToFile) { this.fileName = pathToFile; try { // Try to load the file and read it System.out.println("---------- Start to read the file"); file = readFile(fileName); System.out.println("---------- Property file:"); System.out.println(file); } catch (Exception e) { System.out.println("---------- Error reading file"); System.out.println(e.getMessage()); } } /** * Read a file and return it in a String * @param fName * @return */ private String readFile(String fName) { String properties = null; try { System.out.println("---------- Opening the file"); //to actually retrieve the resource prefix the name of the file with a "/" InputStream is = this.getClass().getResourceAsStream(fName); //we now have an input stream. Create a reader and read out //each character in the stream. System.out.println("---------- Input stream"); InputStreamReader isr = new InputStreamReader(is); char c; System.out.println("---------- Append string now"); while ((c = (char)isr.read()) != -1) { properties += c; } } catch (Exception e) { } return properties; } } I call my class constructor like this: Configuration config = new Configuration("/config.properties"); So in my class, "file" should have all the content of the config.properties file, and the fileName should have this value "/config.properties". But the "name" is null because the file cannot be found... I know this is the path of the file which should be different, but I don't know what i can change... The class is in the package com.mycompany.blackberry.utils Thank you!

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  • Best way to get database result as XML?

    - by John
    I am querying a database and getting the result set as an arraylist. I would like to return this list as XML, but not sure how to do it. Does anyone have an example of returning a result set as XML and is using an Arraylist the best way to do this?

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  • Abstract Base Class or Class?

    - by Mohit Deshpande
    For my semester project, my team and I are supposed to make a .jar file (library, not runnable) that contains a game development framework and demonstrate the concepts of OOP. Its supposed to be a FRAMEWORK and another team is supposed to use our framework and vice-versa. So I want to know how we should start. We thought of several approaches: 1. Start with a plain class public class Enemy { public Enemy(int x, int y, int health, int attack, ...) { ... } ... } public class UserDefinedClass extends Enemy { ... } 2. Start with an abstract class that user-defined enemies have to inherit abstract members public abstract class Enemy { public Enemy(int x, int y, int health, int attack, ...) { ... } public abstract void draw(); public abstract void destroy(); ... } public class UserDefinedClass extends Enemy { ... public void draw() { ... } public void destroy() { ... } } 3. Create a super ABC (Abstract Base Class) that ALL inherit from public abstract class VectorEntity { ... } public abstract class Enemy extends VectorEntity { ... } public class Player extends VectorEntity { ... } public class UserDefinedClass extends Enemy { ... } Which should I use? Or is there a better way?

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  • Enum.values() vs EnumSet.allOf( ). Which one is more preferable?

    - by Alexander Pogrebnyak
    I looked under the hood for EnumSet.allOf and it looks very efficient, especially for enums with less than 64 values. Basically all sets share the single array of all possible enum values and the only other piece of information is a bitmask which in case of allOf is set in one swoop. On the other hand Enum.values() seems to be a bit of black magic. Moreover it returns an array, not a collection, so in many cases it must be decorated with Arrays.asList( ) to be usable in any place that expects collection. So, should EnumSet.allOf be more preferable to Enum.values? More specifically, which form of for iterator should be used: for ( final MyEnum val: MyEnum.values( ) ); or for ( final MyEnum val: EnumSet.allOf( MyEnum.values ) );

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  • Pentaho - Reporting Tool - Is the .prpt file (report template file) contains datasource information

    - by Yatendra Goel
    I am new Pentaho Reporting Tool. I have the following question: When I created a report using Pentaho Report Designer, it output a report file having .prpt extension. After that I found an example on internet where the following code were used to display the report in html format:| protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ResourceManager manager = new ResourceManager(); manager.registerDefaults(); String reportPath = "file:" + this.getServletContext().getRealPath("sampleReport.prpt"); try { Resource res = manager.createDirectly(new URL(reportPath), MasterReport.class); MasterReport report = (MasterReport) res.getResource(); HtmlReportUtil.createStreamHTML(report, response.getOutputStream()); } catch (Exception e) { e.printStackTrace(); } } And the report got printed successfully. So as we haven't specified any datasource information here, I think that the .prpt file contains that information in it. If that's true than Isn't Jasper is better Reporting tool than Pentaho because when we display Jasper reports, we have to provide datasource details also so in that way our report is flexible and is not bound to any particular database.

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  • Single DispatcherServlet with Multiple Controllers

    - by jwmajors81
    I am trying to create some restful web services using Spring MVC 3.0. I currently have an issue that only 1 of my 2 controllers will work at any given time. As it turns out, whichever class comes first when sorted alphabetically will work properly. The error I get is: handleNoSuchRequestHandlingMethod No matching handler method found for servlet request: path '/polinq.xml', method 'GET', parameters map[[empty]] I had a very simliar message earlier also, except instead of the map being empty it was something like map[v--String(array)] Regardless of the message though, currently the LocationCovgController works and the PolicyInquiryController doesn't. If I change the change of the PolicyInquiryController to APolicyInquiryController, then it will start funcitoning properly and the LocationCovgController will stop working. Any assistance would be greatly appreciated. Thank you very much, Jeremy The information provided below includes the skeleton of both controller classes and also the servlet config file that defines how spring should be setup. Controller 1 package org.example; @Controller @RequestMapping(value = "/polinq.*") public class PolicyInquiryController { @RequestMapping(value = "/polinq.*?comClientId={comClientId}") public ModelAndView getAccountSummary( @PathVariable("comClientId") String commercialClientId) { // setup of variable as was removed. ModelAndView mav = new ModelAndView("XmlView", BindingResult.MODEL_KEY_PREFIX + "accsumm", as); return mav; } } Controller 2 package org.example; @Controller @RequestMapping(value = "/loccovginquiry.*") public class LocationCovgController { @RequestMapping(value = "/loccovginquiry.*method={method}") public ModelAndView locationCovgInquiryByPolicyNo( @PathVariable("method")String method) { ModelAndView mav = new ModelAndView("XmlView", BindingResult.MODEL_KEY_PREFIX + "loccovg", covgs); return mav; } } Servlet Config <context:component-scan base-package="org.example." /> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" p:order="0"> <property name="mediaTypes"> <map> <entry key="atom" value="application/atom+xml"/> <entry key="xml" value="application/xml"/> <entry key="json" value="application/json"/> <entry key="html" value="text/html"/> </map> </property> <property name="defaultContentType" value="text/html"/> <property name="ignoreAcceptHeader" value="true"/> <property name="favorPathExtension" value="true"/> <property name="viewResolvers"> <list> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </list> </property> <property name="defaultViews"> <list> <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/> </list> </property> </bean> <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" /> <bean id="XmlView" class="org.springframework.web.servlet.view.xml.MarshallingView"> <property name="marshaller" ref="marshaller"/> </bean> <oxm:jaxb2-marshaller id="marshaller"> <oxm:class-to-be-bound name="org.example.policy.dto.AccountSummary"/> <oxm:class-to-be-bound name="org.example.policy.dto.InsuredName"/> <oxm:class-to-be-bound name="org.example.policy.dto.Producer"/> <oxm:class-to-be-bound name="org.example.policy.dto.PropertyLocCoverage"/> <oxm:class-to-be-bound name="org.example.policy.dto.PropertyLocCoverages"/> </oxm:jaxb2-marshaller>

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  • codingBat separateThousands using regex (and unit testing how-to)

    - by polygenelubricants
    This question is a combination of regex practice and unit testing practice. Regex part I authored this problem separateThousands for personal practice: Given a number as a string, introduce commas to separate thousands. The number may contain an optional minus sign, and an optional decimal part. There will not be any superfluous leading zeroes. Here's my solution: String separateThousands(String s) { return s.replaceAll( String.format("(?:%s)|(?:%s)", "(?<=\\G\\d{3})(?=\\d)", "(?<=^-?\\d{1,3})(?=(?:\\d{3})+(?!\\d))" ), "," ); } The way it works is that it classifies two types of commas, the first, and the rest. In the above regex, the rest subpattern actually appears before the first. A match will always be zero-length, which will be replaceAll with ",". The rest basically looks behind to see if there was a match followed by 3 digits, and looks ahead to see if there's a digit. It's some sort of a chain reaction mechanism triggered by the previous match. The first basically looks behind for ^ anchor, followed by an optional minus sign, and between 1 to 3 digits. The rest of the string from that point must match triplets of digits, followed by a nondigit (which could either be $ or \.). My question for this part is: Can this regex be simplified? Can it be optimized further? Ordering rest before first is deliberate, since first is only needed once No capturing group Unit testing part As I've mentioned, I'm the author of this problem, so I'm also the one responsible for coming up with testcases for them. Here they are: INPUT, OUTPUT "1000", "1,000" "-12345", "-12,345" "-1234567890.1234567890", "-1,234,567,890.1234567890" "123.456", "123.456" ".666666", ".666666" "0", "0" "123456789", "123,456,789" "1234.5678", "1,234.5678" "-55555.55555", "-55,555.55555" "0.123456789", "0.123456789" "123456.789", "123,456.789" I haven't had much experience with industrial-strength unit testing, so I'm wondering if others can comment whether this is a good coverage, whether I've missed anything important, etc (I can always add more tests if there's a scenario I've missed).

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  • Override the Local module directory for cvs using Hudson

    - by Roberto
    Hi guys, I'm using Hudson and I need to change the checkout directory for cvs. Instead of checkout/update the project under the workspace dir, I'd like to specify a dir (as you can do for svn, changing the Local module directory conf) that will match the cvs tree structure. Eg. under cvs dir1/dir2/project on my box workspace/dir1/dir2/project is that possible with cvs and Hudson? Maybe there's a way to override the cvs call? Thanks! Roberto

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  • servlet-mapping for Wordpress on Tomcat using Quercus

    - by Jeremy
    I have a web app running in Tomcat and I'm trying to add a Wordpress blog to it using Quercus. It works if I hit a .php file in my blog, but links to my articles are structured like http://myapp.com/blog/2011/01/my-first-post/ which don't work. Below is my web.xml: <welcome-file-list> <welcome-file>index.do</welcome-file> <welcome-file>index.php</welcome-file> </welcome-file-list> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/myapp-service.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>myapp</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>myapp</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>Quercus Servlet</servlet-name> <servlet-class>com.caucho.quercus.servlet.QuercusServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Quercus Servlet</servlet-name> <url-pattern>*.php</url-pattern> </servlet-mapping> I've tried many combos of url-pattern such as /blog, /blog/*, etc. I can't get anything to work. Any help is appreciated. Thanks!

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  • IText can't keep rows together, second row spans multiple pages but won't stick with first row.

    - by J2SE31
    I am having trouble keeping my first and second rows of my main PDFPTable together using IText. My first row consists of a PDFPTable with some basic search criteria. My second row consists of a PdfPTable that contains all of the tabulated results. Everytime the tabulated results becomes too big and spans multiple pages, it is kicked to the second page automatically rather than showing up directly below the search criteria and then paging to the next page. How can I avoid this problem? I have tried using setSplitRows(false), but I simply get a blank document (see commented lines 117 and 170). How can I keep my tabulated data (second row) up on the first page? An example of my code is shown below (you should be able to just copy/paste). public class TestHelper{ private TestEventHelper helper; public TestHelper(){ super(); helper = new TestEventHelper(); } public TestEventHelper getHelper() { return helper; } public void setHelper(TestEventHelper helper) { this.helper = helper; } public static void main(String[] args){ TestHelper test = new TestHelper(); TestEventHelper helper = test.getHelper(); FileOutputStream file = null; Document document = null; PdfWriter writer = null; try { file = new FileOutputStream(new File("C://Documents and Settings//All Users//Desktop//pdffile2.pdf")); document = new Document(PageSize.A4.rotate(), 36, 36, 36, 36); writer = PdfWriter.getInstance(document, file); // writer.setPageEvent(templateHelper); writer.setPdfVersion(PdfWriter.PDF_VERSION_1_7); writer.setUserunit(1f); document.open(); List<Element> pages = null; try { pages = helper.createTemplate(); } catch (Exception e) { e.printStackTrace(); } Iterator<Element> iterator = pages.iterator(); while (iterator.hasNext()) { Element element = iterator.next(); if (element instanceof Phrase) { document.newPage(); } else { document.add(element); } } } catch (Exception de) { de.printStackTrace(); // log.debug("Exception " + de + " " + de.getMessage()); } finally { if (document != null) { document.close(); } if (writer != null) { writer.close(); } } System.out.println("Done!"); } private class TestEventHelper extends PdfPageEventHelper{ // The PdfTemplate that contains the total number of pages. protected PdfTemplate total; protected BaseFont helv; private static final float SMALL_MARGIN = 20f; private static final float MARGIN = 36f; private final Font font = new Font(Font.HELVETICA, 12, Font.BOLD); private final Font font2 = new Font(Font.HELVETICA, 10, Font.BOLD); private final Font smallFont = new Font(Font.HELVETICA, 10, Font.NORMAL); private String[] datatableHeaderFields = new String[]{"Header1", "Header2", "Header3", "Header4", "Header5", "Header6", "Header7", "Header8", "Header9"}; public TestEventHelper(){ super(); } public List<Element> createTemplate() throws Exception { List<Element> elementList = new ArrayList<Element>(); float[] tableWidths = new float[]{1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.25f, 1.25f, 1.25f, 1.25f}; // logger.debug("entering create reports template..."); PdfPTable splitTable = new PdfPTable(1); splitTable.setSplitRows(false); splitTable.setWidthPercentage(100f); PdfPTable pageTable = new PdfPTable(1); pageTable.setKeepTogether(true); pageTable.setWidthPercentage(100f); PdfPTable searchTable = generateSearchFields(); if(searchTable != null){ searchTable.setSpacingAfter(25f); } PdfPTable outlineTable = new PdfPTable(1); outlineTable.setKeepTogether(true); outlineTable.setWidthPercentage(100f); PdfPTable datatable = new PdfPTable(datatableHeaderFields.length); datatable.setKeepTogether(false); datatable.setWidths(tableWidths); generateDatatableHeader(datatable); for(int i = 0; i < 100; i++){ addCell(datatable, String.valueOf(i), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+1), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+2), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+3), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+4), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+5), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+6), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+7), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true); addCell(datatable, String.valueOf(i+8), 1, Rectangle.NO_BORDER, Element.ALIGN_RIGHT, smallFont, true); } PdfPCell dataCell = new PdfPCell(datatable); dataCell.setBorder(Rectangle.BOX); outlineTable.addCell(dataCell); PdfPCell searchCell = new PdfPCell(searchTable); searchCell.setVerticalAlignment(Element.ALIGN_TOP); PdfPCell outlineCell = new PdfPCell(outlineTable); outlineCell.setVerticalAlignment(Element.ALIGN_TOP); addCell(pageTable, searchCell, 1, Rectangle.NO_BORDER, Element.ALIGN_LEFT, null, null); addCell(pageTable, outlineCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null); PdfPCell pageCell = new PdfPCell(pageTable); pageCell.setVerticalAlignment(Element.ALIGN_TOP); addCell(splitTable, pageCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null); elementList.add(pageTable); // elementList.add(splitTable); return elementList; } public void onOpenDocument(PdfWriter writer, Document document) { total = writer.getDirectContent().createTemplate(100, 100); total.setBoundingBox(new Rectangle(-20, -20, 100, 100)); try { helv = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED); } catch (Exception e) { throw new ExceptionConverter(e); } } public void onEndPage(PdfWriter writer, Document document) { //TODO } public void onCloseDocument(PdfWriter writer, Document document) { total.beginText(); total.setFontAndSize(helv, 10); total.setTextMatrix(0, 0); total.showText(String.valueOf(writer.getPageNumber() - 1)); total.endText(); } private PdfPTable generateSearchFields(){ PdfPTable searchTable = new PdfPTable(2); for(int i = 0; i < 6; i++){ addCell(searchTable, "Search Key" +i, 1, Rectangle.NO_BORDER, Element.ALIGN_RIGHT, font2, MARGIN, true); addCell(searchTable, "Search Value +i", 1, Rectangle.NO_BORDER, Element.ALIGN_LEFT, smallFont, null, true); } return searchTable; } private void generateDatatableHeader(PdfPTable datatable) { if (datatableHeaderFields != null && datatableHeaderFields.length != 0) { for (int i = 0; i < datatableHeaderFields.length; i++) { addCell(datatable, datatableHeaderFields[i], 1, Rectangle.BOX, Element.ALIGN_CENTER, font2); } } } private PdfPCell addCell(PdfPTable table, String cellContent, int colspan, int cellBorder, int horizontalAlignment, Font font) { return addCell(table, cellContent, colspan, cellBorder, horizontalAlignment, font, null, null); } private PdfPCell addCell(PdfPTable table, String cellContent, int colspan, int cellBorder, int horizontalAlignment, Font font, Boolean noWrap) { return addCell(table, cellContent, colspan, cellBorder, horizontalAlignment, font, null, noWrap); } private PdfPCell addCell(PdfPTable table, String cellContent, Integer colspan, Integer cellBorder, Integer horizontalAlignment, Font font, Float paddingLeft, Boolean noWrap) { PdfPCell cell = new PdfPCell(new Phrase(cellContent, font)); return addCell(table, cell, colspan, cellBorder, horizontalAlignment, paddingLeft, noWrap); } private PdfPCell addCell(PdfPTable table, PdfPCell cell, int colspan, int cellBorder, int horizontalAlignment, Float paddingLeft, Boolean noWrap) { cell.setColspan(colspan); cell.setBorder(cellBorder); cell.setHorizontalAlignment(horizontalAlignment); if(paddingLeft != null){ cell.setPaddingLeft(paddingLeft); } if(noWrap != null){ cell.setNoWrap(noWrap); } table.addCell(cell); return cell; } } }

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  • Working with Jasper Reporsts

    - by Chandu
    Hi all, can I integrate the jasper report viewer to my swing application as like if I click on view report button from my application then viewer should be opened. If so could you advice me with code snippet for this integration and in this viewer the save as type should be restricted for PDF only rather than every other download option filter available . Please advice me in this regard. Regards, Chandu

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  • Perf4j Not Logging to Separate File

    - by Jehud
    I setup some stop watch calls in my code to measure some code blocks and all the messages are going into my primary log and not into the timing log. The perfStats.log file gets created just fine but all the messages go to the root log which I didn't think was supposed to happen according to the docs I've read. Is there something obvious I'm missing here? Example log4j.xml <!-- This file appender is used to output aggregated performance statistics --> <appender name="fileAppender" class="org.apache.log4j.FileAppender"> <param name="File" value="perfStats.log"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%m%n"/> </layout> </appender> <!-- Loggers --> <!-- The Perf4J logger. Note that org.perf4j.TimingLogger is the value of the org.perf4j.StopWatch.DEFAULT_LOGGER_NAME constant. Also, note that additivity is set to false, which is usually what is desired - this means that timing statements will only be sent to this logger and NOT to upstream loggers. --> <logger name="org.perf4j.TimingLogger" additivity="false"> <level value="INFO"/> <appender-ref ref="CoalescingStatistics"/> </logger> <root> <priority value="info"/> <appender-ref ref="STDOUT-DEBUG"/> </root>

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  • How to determine if a file will be logically moved or physically moved.

    - by Frederic Morin
    The facts: When a file is moved, there's two possibilities: The source and destination file are on the same partition and only the file system index is updated The source and destination are on two different file system and the file need to be moved byte per byte. (aka copy on move) The question: How can I determine if a file will be either logically or physically moved ? I'm transferring large files (700+ megs) and would adopt a different behaviors for each situation. Edit: I've already coded a moving file dialog with a worker thread that perform the blocking io call to copy the file a meg at a time. It provide information to the user like rough estimate of the remaining time and transfer rate. The problem is: how do I know if the file can be moved logically before trying to move it physically ?

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  • Why can't the compiler/JVM just make autoboxing "just work"?

    - by Pyrolistical
    Autoboxing is rather scary. While I fully understand the difference between == and .equals I can't but help have the follow bug the hell out of me: final List<Integer> foo = Arrays.asList(1, 1000); final List<Integer> bar = Arrays.asList(1, 1000); System.out.println(foo.get(0) == bar.get(0)); System.out.println(foo.get(1) == bar.get(1)); That prints true false Why did they do it this way? It something to do with cached Integers, but if that is the case why don't they just cache all Integers used by the program? Or why doesn't the JVM always auto unbox to primitive? Printing false false or true true would have been way better. EDIT I disagree about breakage of old code. By having foo.get(0) == bar.get(0) return true you already broke the code. Can't this be solved at the compiler level by replacing Integer with int in byte code (as long as it is never assigned null)

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  • Check if thread is EDT is necessary?

    - by YuppieNetworking
    Hello, I have an UI implemented with Swing. One component does some work that may take some time, so I use SwingUtilities.invokeLater. However, I was reading some old code and found this in an ActionListener: if (!SwingUtilities.isEventDispatchThread()) { SwingUtilities.invokeLater(new Runnable() { public void run() { // code X } }); } else { // code X } I thought that it made sense since it separates code X from the EDT. However, I found it error-prone since I have used it a couple of times and both times I forgot the else part. The question is: is the SwingUtilities.isEventDispatchThread() checking necessary? Or could I assume that I am not in the EDT and always use invokeLater? Thanks a lot.

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  • Referencing a file via classpath in spring context

    - by Gandalf StormCrow
    I'm trying to set org.springframework.beans.factory.config.PropertyPlaceholderConfigurer spring bean, I have jdbc.properties in src/main/config .. when I put this file in src/main/resources and put classpath: in value my app deploys successfuly. This works when jdbc.properties is located in src/main/resources <property name="location" value="classpath:jdbc.properties" /> However I'm required to put any configuration inside src/main/config , how do I point springs towards this location in the right way?

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  • scjp certification future validity

    - by abson
    Is this the right time to go for a scjp certification?With Oracle being the authority won't SCJP lose its value as and when OCJP gets announced instead of the former? my worry is will one be able to go for the next level like SCWCD?

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  • How to limit JTextArea max Rows and Coloums?

    - by Billbo bug
    I am using JTextArea in JScrollPane I want to limit the maximum number of lines possible and the maximum chars in each line. I need that the string will be exactly like on the screen, each line will end with '\n' (if there another line after it) and the user will be able to insert only X lines and Y chars in each line. I tried to limit the lines but i don't know exactly how many lines do i have because of the line wrapping, The line wrapping is starting new line visualy on the screen(because of the width of the JTextArea) but in the string of the component it is really the same line with no '\n' to indicate new line. I do not have an idea how to limit the max chars in each line while typing. There are 2 stages: The typing of the string- keep that the user will not be able to type more then X lines and Y chars in each line. (even if the line wrap only visualy or the user typed '/n') Insert the string to the DB- after cliking 'OK' convert the string that every line will end with "/n" even if the user did not typed it and the line was wrapped only visualy. There are few problems if i will count the chars in the line and insert '/n' in the end of the line, thats why i decided to do it in two stages. In the first stage ehile the user is typing i would rather only limit it visualy and force line wrpping or something similar. Only in the second stage when i save string i will add the '/n' even if the user did not typed it in the end of the lines! Does anyone have an idea? I know that i will have to use DocumentFilter OR StyledDocument. Here is sample code that limit only the lines to 3:(but not the chars in row to 19) private JTextArea textArea ; textArea = new JTextArea(3,19); textArea .setLineWrap(true); textArea .setDocument(new LimitedStyledDocument(3)); JScrollPane scrollPane = new JScrollPane(textArea public class LimitedStyledDocument extends DefaultStyledDocument /** Field maxCharacters */ int maxLines; public LimitedStyledDocument(int maxLines) { maxCharacters = maxLines; } public void insertString(int offs, String str, AttributeSet attribute) throws BadLocationException { Element root = this.getDefaultRootElement(); int lineCount = getLineCount(str); if (lineCount + root.getElementCount() <= maxLines){ super.insertString(offs, str, attribute); } else { Toolkit.getDefaultToolkit().beep(); } } /** * get Line Count * * @param str * @return the count of '\n' in the String */ private int getLineCount(String str){ String tempStr = new String(str); int index; int lineCount = 0; while (tempStr.length() > 0){ index = tempStr.indexOf("\n"); if(index != -1){ lineCount++; tempStr = tempStr.substring(index+1); } else{ break; } } return lineCount; } }

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