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Saturday, 7 May 2016

How to enable debug in java application?

To enable debugging in java applications add the jvm arguments,

For Java versions < 5.0 use the following Xdebug and Xrunjdwp args,

    -Xdebug

  -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000

 The above options will work in version greater than JDK 5.0 but not recommended and will not be faster since it will run in interpreted mode instead of JIT, which will be slower.


For latest version you can use the following and the above jvm arguments to enable debugging,

    it is better to use the -agentlib:jdwp single option


    -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000

Friday, 6 May 2016

Ant script to run maven clean and maven install commands

Following is an useful ant script to run the frequent maven commands using the m2 plugin in eclipse,

  <target name="maven clean">
      <artifact:mvn mavenHome="${maven.home}" fork="true">
          <arg value="clean" />
      </artifact:mvn>
  </target>

  <target name="maven install">
      <artifact:mvn mavenHome="${maven.home}" fork="true">
          <arg value="install" />
      </artifact:mvn>
  </target>

  <target name="maven clean-install">
      <artifact:mvn mavenHome="${maven.home}" fork="true">
          <arg value="clean" />
          <arg value="install" />
      </artifact:mvn>
  </target>

This will be useful for projects using maven and ant as build tools.

Saturday, 20 February 2016

Print all the request parameters map in java

This piece of utility code would print all the key-value pairs in the request object.

 Map<String, String[]> params = request.getParameterMap();

 Iterator<String> i = params.keySet().iterator();



 while ( i.hasNext() ){

 String key = (String) i.next();

 String value = ((String[]) params.get( key ))[ 0 ];

 System.out.println("Requst Params Key: ["+key+"] - Val: ["+value+"]");

 }


Here in the above code "request" is an object of "HttpServletRequest".

Wednesday, 10 February 2016

Thursday, 20 August 2015

How to add an existing project to GitHub Repository?

Follow these 10 simple steps to upload your local project to a GitHub repository.

1.  Download, Install and Configure Git hub for windows/Mac OS by visiting https://desktop.github.com/. You can download Windows or Mac version based on your Operating System.
2.  After installing Git, Open Git power shell from Start -> Type "git shell" without quotes and open the "Git Shell" command line program.
3.  Now navigate to your project root folder using the command line too,
cd F:/My_Project

4.  Now issue the following command
$ git init

5.  This command would show you "Initialized empty Git repository in your project root folder"
   eg: Initialized empty Git repository in F:/My_Project
   And you could see a .git folder created under My_Project folder
6.  Add all your files to the repo using the following command,
$ git add *
7.  To check files to be committed,
$ git status

8.  Now commit all the code using the command,
$ git commit -m 'First Committ'
   You'll see something like this,
[master (root-commit) 8201309] First commit
   20 files changed, 439 insertions(+)
   create mode 100644 .classpath
   create mode 100644 .project
   ....
 
9.  Now navigate to Github and create a new repository with any unique name you want to. I am going to give it MyProject here and it will create a github repository with url https://github.com/USERNAME/MyProject
     - Now once the MyProject repository is create we need to push our local My_Project content to it. So enter the following two command,
$ git remote add origin https://github.com/USERNAME/MyProject.git

$ git push -u origin master
10.   Once you issue the above command, you'll see something like this,
Counting objects: 45, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (30/30), done.
Writing objects: 100% (45/45), 8.48 KiB | 0 bytes/s, done.
Total 45 (delta 0), reused 0 (delta 0)
To https://github.com/USERNAME/MyProject.git
             * [new branch]      master -> master
Branch master set up to track remote branch master from origin.

Now visit the https://github.com/USERNAME/MyProject to see your project files pushed to the GitHub.

Monday, 4 May 2015

How to skip the login screen Windows 7 PC


Skip Login Screen in Window 7


- Lakshman

There is a way to skip the logon window screen even if you haven't deleted your password.
 So try the following,

1. Go to Start-->Type Computer Management-->Click on Computer Management.  or 
             Start -->Run --> compmgmt.msc
2. Expand "Local Users and Groups", highlight "Users" and you should see your account in the right
 pane. Right click on your account and set a password.

Follow these steps:

    1. Click Start, click Run, and type "control userpasswords2" without quotes. 



   









 2. Highlight your account and uncheck the
       "Users must enter a username and password to use this computer".


    3. Click Apply.

    4. Enter the password, then click OK.

    5. Click OK again and you're all done.

Now just pressing the power button should get you to the desktop directly without clicking anything.


    Thursday, 19 February 2015

    How to get rid of mdi064.dll Windows startup error message?


    Every morning I just start up my PC just to see a bunch of popups and malware dll's starting up. However I happened to clean up all of 'em except this loner "mdi064.dll",

    The message read:
                "There was a problem starting          
                  C:\User\%USERNAME%\AppData\Local\Temp\\mdi064.dll
                  The specific module could not be found"

    And I was really frustrated about this little popup and din't know how to get rid of it anyway. Some sites suggested that I download and run a full system scan of the free version of MalwarebytesSo, I want to know where these startup programs run from and I found the msconfig command to see the list of starup programs that start with Windows.

    Some info about why this is a Malware:
    •   The library "mdi064.dll" has been detected as malware by 8 anti-virus scanners.
    •   It is automatically set to start up on every windows logon via the current user registry key 'tsiVideo'
    Now, How to disable this item from starting up?.

         Windows key + R and type the run command "msconfig"

    And press Enter key, and now you will see "System configuration utility" interface

    Check for this "tsiVideo" Startup item and disable it(Remove the checkbox). This is the bugger which contains the startup link to the mdi064.dll file located at "C:\Users\admin\AppData\Local\Temp\\". Since its detected as a malware and deleted by your antivirus software, it will no longer be available at that location and shows the dll file is missing.

    After disabling this item, restart the computer to take effect. And you will no longer see this weird popup again.

    If you still facing this problem or if the above steps solved your problem please leave a comment. I'll be at your help anytime.