JDK Difference 1.8 vs 1.7 vs 1.6 .... 1.1

Java 8 (a.k.a 1.8) JSR 337, what's new Language changes: lambda expressions (JSR 335, includes method handles) continuation of Project Coin (small language improvements) annotations on Java types Library changes: Improved Date and Time API	Java 7 (a.k.a 1.7) JSR 336, features and enhancements Language changes: Project Coin (small changes) switch on Strings try-with-resources diamond operator Library changes: new abstracted file-system API (NIO.2) (with support for virtual filesystems) improved concurrency libraries elliptic curve encryption more incremental upgrades Platform changes: support for dynamic languages
Java 6 (a.k.a 1.6) JSR 270. features and enhancements Mostly incremental improvements to existing libraries, no new language features (except for the @Override snafu).	Java 5 (a.k.a 1.5) JSR 176, features and enhancements Language Changes: generics (that's the big one) annotations enum types varargs, enhanced for loops (for-each) Library changes: concurrency utilities in java.util.concurrent
Java 1.4 JSR 59 Language changes: the assert keyword Library changes: regular expressions support NIO integrated XML handling	Java 1.3 Mostly minor improvements, really. Platform changes: HotSpot JVM: improvement over the original JIT
Java 1.2 Language changes: the strictfp keyword Library changes: a unified collections system Swing as a new UI-System on top of AWT Platform changes a real JIT, greatly improving speed	Java 1.1 Language changes: inner classes Library changes: AWT event changes JDBC, RMI reflection
Java 1.0 Initial release, everything is new ;-)

Java File content detector - Apache Tika

1. renamed sample.txt to sample.pdf

2. Add tika-core-1.11.jar in your lib

3. java class
    Output : text/plain File is of type - .txt


import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.tika.config.TikaConfig;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.mime.MimeType;
import org.apache.tika.mime.MimeTypeException;

public class TikaExample
{

    public static void main ( String [] args ) throws IOException, MimeTypeException
    {

      TikaConfig config = TikaConfig.getDefaultConfig ();

        // renamed sample.txt to sample.pdf
        File file = new File ( "D:/drvijay/Reliance/testing/sample.exe" );
        InputStream stream = new FileInputStream ( file );
        // whatever the source you get inputstream, please add buffer for mark/reset support,
        // else u may get exception
        InputStream bufferedIn = new BufferedInputStream ( stream );

        final Metadata metadata = new Metadata ();
        metadata.set ( Metadata.RESOURCE_NAME_KEY, file.getName () );
        MediaType mediaType = config.getMimeRepository ().detect ( bufferedIn, metadata );
        // MediaType mediaType = config.getMimeRepository ().detect ( bufferedIn, new Metadata() );
        MimeType mimeType = config.getMimeRepository ().forName ( mediaType.toString () );
        String extension = mimeType.getExtension ();

        System.out.println ( mimeType + " File is of type - " + extension );
    }
}

Chrome Hangs or Freezed

Follow these simple steps.

 1. Goto->start->run and type 

%appdata%

go back to appdata folder from roming folder. or simply open C:/Users/youruser/AppData

C:\Users\youruser\AppData\Local\Google\Chrome\User Data
 
1.1 delete default (folder) and  localstate (file)

 2. download google cleanup tool and run it

https://www.google.com/chrome/cleanup-tool/

2. open chrome as administrator
    Place mouse on chrome icon -> right click -> run as adminstrator


3.  disable shock/flash plugin 
type in chrome browser :

chrome://plugins

4. in chrome settings -> advance settings 

    4.1 change your download path,
     4.2 uncheck the [ use hardware acceralation when available ]
     4.3 uncheck the continue running background apps


ENJOY madi

Git or bitbucket checkout public key - Self signed certificate issue

git-Checkout
************

1. generate your self signed private key from "putty-gen.exe" or "open ssl" etc..
    > generate new key
    > save private key ex: D:/drvijay/self-private.ppk


2. type  the below command in cmd 1. to ignore ssl verify, 2. add your self certificate , 


3. check out 

    > git config --global http.sslverify false
    > git config --system http.sslCAPath D:/drvijay/self-private.ppk

    > git clone https://@url/repo.git
    > pwd: test123


-- Enjoy

linux Ubuntu Postgresql Setup Installation

Type the below commands.

postgresql
**********
    sudo apt-get install postgresql postgresql-contrib
    apt-cache search postgres
    sudo apt-get install pgadmin3


create default user/role postgres
**********************************
    sudo -u postgres psql postgres
    \password postgres
    p0stgr3s
    p0stgr3s

linux Ubuntu SVN Setup Installation

svn
***
Type the below commands.
**********************

    sudo apt-get install subversion apache2 libapache2-svn

checkout
********
    svn co --username vijay svn://182.71.255.164/svn/repos/FastRaq/trunk/3.Implementation/Code/middleware
    enter pwd

linux Ubuntu Maven Setup Installation

Maven
*****
Type the below commands.

    sudo apt-get install maven
    sudo update-alternatives --config mvn

linux Ubuntu JDK Java Setup Installation

java 1.8
*******

Type the below commands.

    Installing Java 8
        $ sudo add-apt-repository ppa:webupd8team/java
        $ sudo apt-get update
        $ sudo apt-get install oracle-java8-installer
    Verify java
        $ java -version
    Configuring Java Environment
        $ sudo apt-get install oracle-java8-set-default

linux Ubuntu Git Setup Installation

Git
***
Type the below commands.

    sudo apt-get install git-core
    git clone https://github.com/ebhaiah/middleware-soa.git

Linux - Ubuntu - Mongodb Installation Setup

mongodb
*******


1.    Install MongoDB
    Import the public key used by the package management system.

    sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

2Create a list file for MongoDB.

    echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list

3 Reload local package database.

    sudo apt-get update

4 Install the MongoDB packages.

    sudo apt-get install -y mongodb-org

4.1 Install a specific release of MongoDB.

    sudo apt-get install -y mongodb-org=3.0.7 mongodb-org-server=3.0.7 mongodb-org-shell=3.0.7 mongodb-org-mongos=3.0.7 mongodb-org-tools=3.0.7

5. Start MongoDB.

    sudo service mongod start

5.1 Verify that MongoDB has started successfully
    Verify that the mongod process has started successfully by checking the contents of the log file at /var/log/mongodb/mongod.log for a line reading

6 Stop MongoDB.

    sudo service mongod stop

7 Restart MongoDB.
   
    sudo service mongod restart

8. mongodb - uninstall

    sudo service mongod stop
    sudo apt-get purge mongodb-org*
    sudo rm -r /var/log/mongodb
    sudo rm -r /var/lib/mongodb