CODE EXAMPLE FOR JAVA

regular expression java

//Ther are three type of REGULAR EXPRESSION     
   //first
   ^(.+)@(.+)$   "^(.+)@(.+)$""
   //second
   ^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,6}$
     //third
   ^[w!#$%&'*+/=?`{|}~^-]+(?:.[w!#$%&'*+/=?`{|}~^-]+)*@(?!-)(?:[a-zA-Z0-9-]+.)+[a-zA-Z]{2,6}$