Validating Email in Java

[KALYAN23]

I have a question about validation. I am developing a project in Java. For this project I am not able to get the Email entered to be Validated. I need to validate the email so that on a valid email can be accepted. What criteria should be taken into account while validating an Email in Java. Can anyone suggest a suitable solution ?

[Praetor]

Well I can help you with the criteria for validation of email. But try to code it youself. An email should always start with either an alphabet or a number. It can contain A-Z or a-z or numerics 0-9 , an Underscore "_" and now-a-days even a period "." It should contain an @ symbol and a valid domain name. A simple example would be: emailidname@emailprovidername.domain name No spaces are allowed. Also the following are not valid ( ) ; < > @ : , \ [ ]

[Katty]

Validating an email is not an easy task in java. There are various conditions to be taken care of. Try running this code:

package mypck.regex;
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class ValidEmail
 {
 
	  private Pattern pat;
	  private Matcher mat;
 
	  private static final String epat = 
   "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
 
	  public ValidEmail()
               {
		  pat = Pattern.compile(epat);
	   }
 	 
	  public boolean validate(final String hex){
 
		  mat = pat.mat(hex);
		  return mat.matches();
 
	  }
}

[kelfro]

I also had a same issue when I had to do it for the first time. Here is code that can help you to validate email in Java programming language.

package temp;


public class valmail
{
private String eid="";

public valmail(String eid)
{
 this.eid = eid;
}

public boolean chk()
{
 if (eid == null)
 return false;
 
 if(eid.equals(""))
 return false;
 
 int pos1 = eid.indexOf("@");
 int pos2 = eid.indexOf("@",pos1+1);

 if (pos2>=0)
 return false;
 
 int pos1a = eid.indexOf(".");
 int pos2a = eid.indexOf(".",pos1a+1);

 if (pos2a>=0)
 return false;
 
 return true;
}

}

You can edit the code to fit to your project's requirement. Best of Luck.