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Write a function to check for valid username

write a function to check for null username, special characters, non-printable characters and white space characters in username, and throw appropriate exceptions

Skills: J2EE, Java

See more: write space google drive, winapi check function, write technical white paper, pagerank check function, check hard drive space, php xss check function, onsubmit check function, check special characters flash, javascript age check function, sql2000 date check function

About the Employer:
( 12 reviews ) Sterling, United States

Project ID: #14671508

70 freelancers are bidding on average $17 for this job

$60 USD in 1 day
(178 Reviews)
6.6
NovaSofts

Hello Sir We have been working on Freelancer for 2 years and providing the best services to our [url removed, login to view] can check our profile for checking our [url removed, login to view] can provide perfect Quality work. thanks Relevant Skills More

$19 USD in 1 day
(116 Reviews)
6.5
abedin94

H , this is sid . I am a software engineer for 2 years . i am a pro in the java field . You can give me the project . Its a piece a cake for me . Relevant Skills and Experience J2EE, Java Proposed Milestones $17 USD More

$17 USD in 1 day
(68 Reviews)
5.6
$15 USD in 1 day
(79 Reviews)
5.2
$17 USD in 1 day
(13 Reviews)
5.2
imanolie

Hi there, I am an experienced java developer. I can do this for you in minutes. Relevant Skills and Experience java Proposed Milestones $20 USD - Project completion

$20 USD in 0 days
(14 Reviews)
5.0
neerajagrawal201

Hi, We are serving in the field of Website & Software Design, HTML, CSS, Java, PHP, C#, javascript, bootstrap, [url removed, login to view], .NET, SQL, Biometrics, Android native/hybrid, since 2015. We also started providing service in More

$10 USD in 1 day
(39 Reviews)
5.0
tgchauhan1711

Hello sir I am expert in java and j2ee and skills you mentioned. Please see my profile and skills. Please give me more details about your project. thank you Relevant Skills and Experience I have 2 year exper More

$12 USD in 1 day
(10 Reviews)
4.2
mahmoudgamal008

I have more than 5 years of experience in java and I can do this task right now

$25 USD in 0 days
(8 Reviews)
3.4
anuragiitk

I am an IITK graduate and I have 9 years of experience in software development. I have 100% completion rate and I have finished all the projects with the highest level of customer satisfaction. Relevant Skills and Exp More

$111 USD in 1 day
(17 Reviews)
5.1
anhnh23

Hi there, I have a bachelor’s degree in Computer Science & I have 5+ years in Java; Solving problem and optimizing system are my passion. Satisfied customers is my key strategy. Relevant Skills and Experience Object-o More

$15 USD in 1 day
(18 Reviews)
3.7
microservices

A proposal has not yet been provided

$10 USD in 1 day
(17 Reviews)
3.8
kbmanoj

I have good exposure in java j2ee development.I would like to take up the [url removed, login to view]! Relevant Skills and Experience java j2ee Proposed Milestones $15 USD - development support

$15 USD in 1 day
(5 Reviews)
4.4
BhavinJethava

Hi, I have more then 5 years of experience in JAVA,Web technologies like Spring , Hibernate and Desktop application like JAVAFX. Kindly share your requirements in details I will serve you best with my best efforts. More

$17 USD in 1 day
(4 Reviews)
3.2
$15 USD in 1 day
(9 Reviews)
3.3
colinxxyy

i can do this for you, check username valid or invalid base on some rules. Relevant Skills and Experience i can do this for you, check username valid or invalid base on some rules. Proposed Milestones $15 USD - 15

$15 USD in 1 day
(1 Review)
3.2
mehfuza

Dear Sir, I have done data validation in JavaScript and surely can do this in Java or other language. Relevant Skills and Experience I have experience of programming in Java, C and C++. Proposed Milestones $10 USD - More

$10 USD in 1 day
(5 Reviews)
3.3
sumit4job

I have worked with enterprise application which was developed using java / spring. can fulfill ur requirements very easily

$17 USD in 1 day
(2 Reviews)
2.8
$20 USD in 1 day
(8 Reviews)
2.4
skavras

It is a very simple task and I will do this for you with pleasure. Question: usually such functions are needed in JavaScript not in Java. Do need it in Java exactly? I can both, just need to know :) Relevant Skills an More

$15 USD in 1 day
(1 Review)
2.3