Eclipse RCP Step by Step

Error :  symbol lookup error: /usr/lib64/xulrunner-1.9.2.17/ libxul.so: undefined symbol: gdk_screen_get_resolution Solution : 1. Locate the XULRunner library.  # cd /usr/lib # ls -ld xul* lrwxrwxrwx 1 root root 21 2012-02-20 17:32 xulrunner-1.8.0 -> xulrunner-1.8.old lrwxrwxrwx 1 root root 21 20012-02-20 10:44 xulrunner-1.8.0.1 -> xulrunner-1.8.new lrwxrwxrwx 1 root root 18 2012-08-07 10:43 xulrunner-1.9 -> xulrunner-1.9.0.11 drwxr-xr-x 12 root root 4096 2012-08-07 10:45 xulrunner-1.9.0.11 2. If you are not able to locate the XULRunner in your system then, download from following location and install it : http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases 3. Modify eclipse.ini file with the xulrunner path found. append the following line at the end of the file. -Dorg.eclipse.swt.browser.XULRunnerPath=/usr/local/xulrunner-1.9.0.11/ 4. Restart your RCP.

Native Library in Eclipse RCP Plug-in Adding native library in eclipse RCP is little-bit bit tricky part. Mainly native library has extensions like .so or .dll . There are multiple ways to define this kind of libraries to the eclipse RCP plug-in. (Follow steps one by one anyone of them will work.) Here we take one example : Suppose you have following directory structure <dirPath>/NativeLibraryDirectory/      --- nativeFile.jar      --- nativeLib.so 1. Adding library to the project For adding library to the project , right click on Project name -> select "Properties..." -> then go to "Java Build Path" Add nativeFile.jar from External jar button. Expand nativeFile.jar and double click on "native library location" enter the path "<dirPath>/NativeLibraryDirectory/" 2. Using LD_LIBRARY_PATH Set following environment before starting the Eclipse. setenv LD_LIBRARY_PATH <dirPath>/NativeLibraryDirectory/:$LD_

If you are seeing following error at the beginning of the Eclipse or any RCP based product then here is the solution: Error Message: "Could not launch the product because the associated workspace is currently in use by another Eclipse application." or “Workspace in use or cannot be created chose a different one.” Solution :  go to workspace location remove file <workspace location>/.metadata/.lock Reason: Through eclipse, user can create multiple Workspace locations. One Workspace location can be edited by one user at a time. A workspace contains the data related to various project configuration and local file storage. To avoid multiple users to access the same workspace, eclipse is maintaining a ".lock" file inside the Workspace. Eclipse will remove this ".lock" file when you will close the Eclipse. But in some cases, the Eclipse will crash due to some error, due to which it could not able to remove ".lock" file from

How to run Maven from another directory ? Supposing my Maven project is found in /home/harikr/some/project/location and my current location is /home/harikr/abc/location/ however am I able to run Maven build while not ever-changing to project location cd /some/location/project? Solution : mvn -f  /home/harikr/some/project/location/pom.xml

Singleton Design Pattern Singleton Design Pattern means able to create only one object of the class. When you want to restrict some class from being created multiple objects, this design pattern is being used. First step of creating the class singleton is to make it's constructor private so other class can't call it anytime and create and object of it. Then create a static method "getInstance" which will return the object of the same class . Here its SingletonExampleClass . This method (getInstance) is created static , because this class has private constructor so we won't have it's object with us to access this class first time. Synchronized block is used stop multiple threads to access the instantiation code block at the same time, else it will be able to create multiple objects. now assume that two thread are there T1 and T2. Not Thread T1 access this method first and acquire the lock. While Thread T1 was accessing the code inside Synchronized bl

How to resolve : print() on closed filehandle in perl Error "print() on closed filehandle" generated in the following condition ( it is on of possible cause of it) -------------------------- BEGIN Code --------------------------------------- my $inputFile = '/this/is/path/of/your/input/file.txt'; open(MYINPUTFILE, ">","$inputFile"); print MYINPUTFILE "any data"; close(MYINPUTFILE); -------------------------- END Code --------------------------------------- here if you don't have permission to access the path '/this/is/path/of/your/input/file.txt' or the path (of parent directory) does not exist then it will throuw the error : print() on closed filehandle To resolve this better to make practice as follow while opening the file: -------------------------- BEGIN Code --------------------------------------- open(MYINPUTFILE, ">","$inputFile") or die "ERROR ::: unable access the file&

There are three  reason,for this java.io.FileNotFoundException to be thrown at run-time and the reasons are follows: Reason1:    "If the given file is not available in the specified location then this error will occur". As you see,this is the most obvious reason for this exception as indicated by the Exception itself. Example: import java.io.*; public class Example1{ public static void main(String[] args){ FileReader reader = new FileReader("c:/javaInterviewExam.txt"); BufferedReader br = new BufferedReader(reader); String strcontent =null; while ((strcontent = br.readLine()) != null){ System.out.println(strcontent); } br.close(); } } In the above code during the execution of the line BufferedReader br=new BufferedReader(reader); if the file exam.txt is not found in the given location then the following error message will appear. Error message: java.io.FileNotFoundException: c:\ javaInterviewExam .txt (The system can

There are couple of ways to do it , 1. first is configure surefire with testFailureIgnore=true. 2. Second way is execute following line from the command line.  mvn install -Dmaven.test.failure.ignore=true

Error While installing Maven in Eclipse Cannot complete the install because one or more required items could not be found.   Software being installed: m2e - Maven Integration for Eclipse 1.4.0.20130601-0317 (org.eclipse.m2e.feature. feature.group 1.4.0.20130601-0317)   Missing requirement: Maven POM XML Editor 1.4.0.20130601-0317 (org.eclipse.m2e.editor.xml 1.4.0.20130601-0317) requires 'bundle org.slf4j.api 1.6.2' but it could not be found   Cannot satisfy dependency:     From: Maven Integration for Eclipse (Editors) 1.4.0.20130601-0317 (org.eclipse.m2e.editor 1.4.0.20130601-0317)     To: bundle org.eclipse.m2e.editor.xml [1.4.0,1.5.0)   Cannot satisfy dependency:     From: m2e - Maven Integration for Eclipse 1.4.0.20130601-0317 (org.eclipse.m2e.feature. feature.group 1.4.0.20130601-0317)     To: org.eclipse.m2e.editor [1.4.0.20130601-0317] Solution : 1. Goto : Help -> Install New Software 2. Add following URL in "Work with:" http:

Java was started but returned exit code=13 Cause of the Error : This error mainly comes due when you execute the build of the Eclipse RCP. Here I ‘m providing the probable solution to resolve this error. This error mainly comes when there is error in the "Product Configuration". So when this kind of error comes, try to create new "Product Configuration" and re generate the build of it. Here are the steps to create the new "Product Configuration". Follow all the steps and generate the new Build and then try and check if it works ok or not. How to Create new "Product Configuration" ? Right click on project name, then select “New” -> “Other…” Select “Plug-in Development” -> “Product Configuration” Enter “File name:”   Select your project in “use an existing product:” Click on Finish   Open “Dependencies” and click on “Add Required Plug-ins” Rig

Before we start working on Eclipse RCP we required the Window builder. Windows builder is not necessary to create the Eclipse RCP application. Using Windowbuilder, designing the RCP application will be more easy and comfortable, so Here I explain the steps to install Window Builder inEclipse environment. It is very easy to add Windw builder plug-in in it. Following are the steps. Goto “help” -> “Install New Software…” Enter following URLs as per the version of the Eclipse : Eclipse 3.7 (Indigo) http://dl.google.com/eclipse/inst/d2wbpro/latest/3.7 Eclipse 3.6 (Helios) http://dl.google.com/eclipse/inst/d2wbpro/latest/3.6 Eclipse 3.5 (Galileo) http://dl.google.com/eclipse/inst/d2wbpro/latest/3.5 Click on “Next” Click on “Next” Select radio button for “I accept the terms of the license agreements”. Click on Finish. At the end (after installation completes), it will ask to restart the Eclipse. Click on Restart option

Error : Bad : modifier in $ (/) Error occurrence : $> setenv PATH $PATH:/data/data12/harikr/data45/ Bad : modifier in $ (/). Solution : $> setenv PATH $ { PATH } :/data/data12/harikr/data45

package com.file.read; import java.io.FileReader; import java.io.BufferedReader; import java.io.IOException; public class ReadFileInJava { public static void main(String[] args) { BufferedReader buffRead = null; try { String eachLine; buffRead = new BufferedReader(new FileReader("C:\\readfile.txt")); while ((eachLine = buffRead.readLine()) != null) { System.out.println(eachLine); } } catch (Exception e) { e.printStackTrace(); } finally { try { /* * close the BufferReader if there is any exception. */ if (buffRead != null)buffRead.close(); } catch (IOException ex) { ex.printStackTrace(); } } } }

Following are the steps to create Basic Eclipse RCP plugin. Click on File. Select "Project ..." from sub Menu. 3. select "Plug-in Project" 4. click on "Next >" 5. Enter Project name. 6. click on "Next >" 7. select the option "This plug-in will make contribution to the UI" 8. Select "yes" as an option for the question "Would you like to create a rich client application?" 9. Click on "Next >" 10. Select "RCP 3.x Mail Template" 11. click on "Finish" Once you click on finish, the Plug-in project will be created as shown below:

eclispe RCP error : !SESSION 2012-07-11 10:17:35.813 ----------------------------------------------- eclipse.buildId=unknown java.version=1.6.0_24 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -product test.product Command-line arguments: -product test.product -data /home/harik/workspace/sample/../runtime-test.product(5) -dev file:/home/harik/workspace/sample/.metadata/.plugins/org.eclipse.pde.core/test.product (5)/dev.properties -os linux -ws gtk -arch x86_64 -consoleLog !ENTRY org.eclipse.equinox.app 0 0 2012-07-11 10:17:36.351 !MESSAGE Product test.product could not be found. !ENTRY org.eclipse.osgi 4 0 2012-07-11 10:17:36.395 !MESSAGE Application error !STACK 1 java.lang.RuntimeException: No application id has been found. Solution : Goto "Run->Run Configurations...", Select "Plug-ins" tab and click the "Add Reuired Plugin" button