Eclipse file not found exception while reading the resource

Put the resource file in base directory.

/src

/bin

resource.properties

and read it like new File("resource.properties");

Use xpath on chrome console

$x("//img")

Eclipse Che install on windows

Tried all the install methods on the downloads page the stuff that worked for me on windows 7 was .

Get the git from the repo.
https://github.com/codenvy/che

Follow the read me and build from source with mvn clean install


che.bat start and tomcat is started.

http://localhost:8080/ide ( please note localhost:8080 won't open any thing)

cordova not found

By default your node modules will be installed under the user folder and the path will not be registered with the windows PATH variable.

So add the path to the path variable and run the cordova example.

its not the case with the OOB node modules , they will be available in the path.

It got me confused for a while,

install custom apk to android emulator

if you have got an apk out of phonegap and you are wondering how to test it on android device.

export the apk from the build.phonegap.com and run the below command from android studio.

E:\sdk_android\platform-tools>adb.exe install "hello-debug.apk"

find mysql port

go to bin 

mysql.exe 

 SHOW GLOBAL VARIABLES LIKE 'PORT';

Garbage Collection and JVM tuning

To tune jvm you might need to look at the heap size and how it is growing.

You might have to look at how objects are moving different areas of heap 

from EDEN to s0 - s1 to old generation.

A very cool tool you can get from jvisualvm located in jdk/bin

get the tool up and running and install a plugin which says Visual GC which will give you 

realtime information about the heap.

check pictures..

TO cd to a folder in windows using wild characters

cd  e:\bea\jdk150~1\bin

 will take to you whatever is there after 0 and 1 e.g >cd  e:\bea\jdk150_10\bin\java

lol.

export display from a unix system to windows

Download MochaX server and run it on windows.
Unix prompt $ export DISPLAY=XXXX:0
try xclock - if you see a clock the display is exported.

Now run your program and your display will be exported to the windows.

Analyze the heap captured from jvisualvm

Get a heap dump and run the oql console.
you will find some sample queries on the right hand side.

Create your own custom query like this

select s from java.lang.String s where s.toString().startsWith("userName")

if your code base has this string object it will come in the query results and 

from there you can find the references of the objects in the object tree.

Create ant build on a demo project

Download ant zip from apache.org

Create a project - with java code in src directory

put the below xml as build.xml in same directory.

Run the ant from command line as 

>ant compile jar run

if you want to specify a special build file you can do so with 

> ant -buildfile build.xml compile jar run

<project>

   <target name="clean">

       <delete dir="build"/>

   </target>

   <target name="compile">

       <mkdir dir="build/classes"/>

       <javac srcdir="src" destdir="build/classes"/>

   </target>

   <target name="jar">

       <mkdir dir="build/jar"/>

       <jar destfile="build/jar/HelloWorld.jar" basedir="build/classes">

           <manifest>

               <attribute name="Main-Class" value="javatest.JavaTest"/>

           </manifest>

       </jar>

   </target>

   <target name="run">

       <java jar="build/jar/HelloWorld.jar" fork="true"/>

   </target>

</project>

How to get npm running behind a corporate network - using proxy

E:\Tools\nodejs>npm config set proxy http://proxy:8080

E:\Tools\nodejs>npm config set https-proxy http://proxy:8080

Create a war file from jar command

jar cvf xxxx.war *    // navigate inside folder and run it

* will include all the files

Find Eclipse Version

How to find the eclipse version ?


Go to Help --> About Eclipse.

find the icon which says eclipse.org  and click on it.

In the details section check the feature name as Eclipse Platform --> Check the version in the bottom
section

In this case 3.7 is the Eclipse version.