Java/j2Ee Discussions

[innovative]

[quote name='anish' timestamp='1374972203' post='1304020226']
I'm looking for online training, class room training ante kastam emo, I'm working in SAP , want to come out of that ,youtube videos ante complete end -end training unnaya ?
[/quote]

Depends on you actually .. online training iche vallu vuntaru mee frds circle lo inquiry cheyyi .. u wil find one easily ..
inka youtube lo end to end training impossible .. topic based iythe, then i would say youtube is a good source..

start with a good java book .. [size=4] [/size]

[pavan_613]

.

[king420]

Jailer and Innovative

[Ever_forEver]

endi vayya idi munduku vellatleee??

[king420]

Jailer mama...different Logger levels ni explain cheyavaa
logger.info
logger.debug
logger.warn
logger.error
logger.fatal

asalu ivi enduku....emitiii elaaa

[king420]

Jquery code sample

[CODE]
$.ajax({
url: "/api/getWeather",
data: {
zipcode: 97201
},
success: function( data ) {
$( "#weather-temp" ).html( "<strong>" + data + "</strong> degrees" );
}
});
[/CODE]

[king420]

babuluu while posting sample code use

<> (code) tag so it will appear as above

[king420]

JQUERY syntax
[color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
The jQuery syntax is tailor made for [b]selecting[/b] HTML elements and performing some [b]action[/b] on the element(s).[/size][/font][/color][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
Basic syntax is: [b]$([i]selector[/i]).[i]action[/i]()[/b][/size][/font][/color][list]
[*]A $ sign to define/access jQuery
[*]A ([i]selector[/i]) to "query (or find)" HTML elements
[*]A jQuery [i]action[/i]() to be performed on the element(s)
[/list][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
Examples:[/size][/font][/color][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
$(this).hide() - hides the current element.[/size][/font][/color][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
$("p").hide() - hides all <p> elements.[/size][/font][/color][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
$(".test").hide() - hides all elements with class="test".[/size][/font][/color][color=#000000][font=verdana, helvetica, arial, sans-serif][size=3]
$("#test").hide() - hides the element with id="test".[/size][/font][/color]

[king420]

sample code click function

[CODE]
$("#btn1").click(function(){
alert("Text: " + $("#test").text());
});
$("#btn2").click(function(){
alert("HTML: " + $("#test").html());
});
[/CODE]

[roome6]

haffy mama., asala Java lo munigi teluthunnavu kada., how is ur learning experience., ?? Java gurinchi idea leni vallaki use avutundhi kada.

[chandu1987]

Evaraina java lo ft unnara?? Unte..interview prep tips and ee ee concepts concentrate cheyyalo evaranna selavisthara??

[cherlapalli_jailer]

[quote name='HAPPYNESS' timestamp='1376242535' post='1304100481']
Jailer mama...different Logger levels ni explain cheyavaa
logger.info
logger.debug
logger.warn
logger.error
logger.fatal

asalu ivi enduku....emitiii elaaa
[/quote]
these all things can be set in log4j properties as all of us know

now let us discuss purpose and use of them

they r mainly used to help developer debug at various levels

when we r building a large applications it is really tough trace where the mistake was

unual practice

INFO, ERROR , DEBUG

when developing we use above 3

like if we are writing a meihod of say 10 lines
We normlly add one info stmt

u can use any number of debug stmts

in way
when you run ur application with help of debug stmts u will know each and every line of code (how it is executing) again it is upto us
how many DEBUG stmts we want in a method

more over u can have any number of debug stmts in ur class/method

when it come to INFO restrict to 1 or 2 per method

error : mostly catch block will have the error stmts

why INFO should be restricted ?
Coz in production and UAT u will have INFO level turn on...so more the print stmts it will effect the performance drastically
so be sensible in using INFO

why we can have more debug stmts?
normally in dev mode we turn on DEBUG mode so we know exactly how our code is behaving..

initial system test and QA test also we can turn on DEBUG mode till QA complains the slow ness

but production and UAT u can not have DEBUG on coz it may bring the system down coz normally we opt to print every thing in debug mode (that is the purpose)

so when we use debug ?

some times we get peculiar run time errors in production which you cannot reproduce in QA
and with the help INFO stmt if we cannot figure out the error

then u can turn on debug mode in production for a brief period and see the error occured and take the DEBUG logs

and find the issue and fix it

for this DEBUG stmts are very useful

more over If u write more DEBUG stmts u will get complete grip on DATA of the application

so while writing INFO stmt be sensible and careful

while writing the DEBUG stmts be more generous and write as much as u can

WARN and FATAL are some thing when u developing product .....we use it ...but no need to worry

mainly INFO , DEBUG ERROR(in catch)

[kiran karthik]

SCJP prepare ayye vallaki [url="http://www.examlab.org/"]http://www.examlab.org[/url]

chala helpful ga undi

[innovative]

[quote name='dhruva' timestamp='1376257818' post='1304101346']
Evaraina java lo ft unnara?? Unte..interview prep tips and ee ee concepts concentrate cheyyalo evaranna selavisthara??
[/quote]

req specific ga vuntadhi interview .. and some times, it depends on company ...

[size=4]ur question is more generic .. FT iythe java lo core concepts iythe pakka ga prep iyyi vellu ... and small puzzles ki alogrithms adugutharu konni companies (amazon for ex) .. [/size]

[kiran karthik]

[quote name='innovative' timestamp='1376804926' post='1304130846']

req specific ga vuntadhi interview .. and some times, it depends on company ...

[size=4]ur question is more generic .. FT iythe java lo core concepts iythe pakka ga prep iyyi vellu ... and small puzzles ki alogrithms adugutharu konni companies (amazon for ex) .. [/size]
[/quote]
em algorithms?