Skip to main content

How to use My Eclipse in Java part2

Q) What are different kinds of java projects we can develop in myeclipse ?

java project => J2se
web project => jsp/servlet/struts/spring
ejb project  => ejb
web service project => web service
Enterprise Application Project => ejb + servlets/jsp

Q) How to create java project?
file -> new -> java project=>enter project name

Q) What is the package convention?


Inversedomainname.projectname.modulename.technology/usecase


package convention
 com.companyName.projectName.moduleName.useCase

Q.) How to get Content assist?

--> The content assistant allows you to get input help
in an editor. It can be invoked by CTRL + Space.

Q.) How to get Quick Fix ?

--> Whenever there is a problem in the code Eclipse will highlight it as an error. Then Select error part and press (Ctrl+1)

-->Quick Fix is extremely powerful, it allows you to create new local / instance variables, new methods, classes, put try and catch around your exceptions, assign a statement to a variable etc.

Q.) how to Add external library (.jar ) to the Java classpath?

--> right click on project -> new -> folder -> "mylib"
--> copy and paste jar files into "mylib" folder.
--> right click on jar file-> Build path -> Add to Build path

or

--> right click on project -> Build path -> Configure Buildpath -> libraries -> Add External jars -> Select required jar file.


Q.)  Add source code for jar ?

--> Open the Java Build Path page of a project (Projects > Properties > Java Build Path). On the Libraries page                      expand the library's node and select the Source attachment attribute and press Edit

            Maintain the location to the source attachement.

Q.) Add the Javadoc for a jar

                                                                                                      
--> Download the javadoc of the jar and put it somewhere in your filesystem.

--> Open the Java Build Path page of a project (Projects > Properties > Java Build Path). On the Libraries page                      expand the library's node and select the Javadoc location attribute and press Edit

            Maintain the location to the api.

Important Preference Settings


Window->Preferences -> java -> Editor -> Typing
Window -> Preferences -> java -> Editor -> Save Actions

=> You can export your Preferences settings from one workspace via
 File -> Export -> General -> Preferences -> Give file name and location
File -> Import -> General -> Preferences -> select exiting preference file



 Similar you can import them again into your workspace.

Comments

Post a Comment

Popular posts from this blog

Applications of Insulating Materials

All electrical systems require some kind of insulation to prevent short circuits and leaking currents. 3 forms of insulators: solid, liquid and gaseous Performance of these insulators depend on the temperature Classification according to their temperature rating. Impregnation: Letting the solid material absorb some liquid With the advent of new materials, the classification has been modified by International Electrotechnical Commission: The transformer insulation: (a) conductor or turn-to-turn insulation, (b) coil-to-coil insulation, (c) low voltage coil-to-earth insulation, (d) high voltage coil-to-low voltage coil insulation, and (e) high voltage coil-to-ground insulation. Transformer oil -- provides the required dielectric strength and insulation -- cools the transformer by circulating itself through the core and the coil structure. -- should be in the liquid state over the complete operating range of temperatures between -40°C and+50°C. -- gets o...
15 comments
Read more

MULTILEVEL INVERTER

                                       MULTILEVEL INVERTER Historical Review From the late nineteenth century through the middle of the twentieth century, DC-to-AC   power conversion   was accomplished using   rotary converters   or   motor-generator   sets (M-G sets). In the early twentieth century,   vacuum tubes   and   gas filled tubes began to be used as switches in inverter circuits. The most widely used type of tube was the   thyratron . The origins of electromechanical inverters explain the source of the term   inverter . Early AC-to-DC converters used an induction or synchronous AC motor direct-connected to a generator (dynamo) so that the generator's commutator reversed its connections at exactly the right moments to produce DC. A later development is the synchronous converter, in which the motor and generator windin...
Post a Comment
Read more

JSTL-JSP Standard Tag Library part 2

Evolution of JSTL-JSP Standard Tag Library As JSP grew in popularity, it became clear that different sites' custom tags fell into familiar, frequently used patterns. For example, many pages needed to loop over data to print tables and lists. Vendors of JSP containers and members of the open-source community tried to address these needs by providing collections of tags --tag libraries--that solved common problems. While many JSP page authors used these libraries, nothing tied them together. To address this fragmentation, the Java Community Process --the same group that now maintains and standardizes JSP itself --decided to offer a standard tag library. JSTL 1.0, to include tags for the following common tasks:          •Looping over data to produce tables, lists, etc.          •Conditional operations          •Importing and processing data from other web pages         ...
Post a Comment
Read more