Here is the code which I trying to read the principal
,but I am getting null.

import javax.security.jacc.*;
import java.security.*;
import javax.security.auth.Subject;
import java.util.*;
public class SamplePolicy extends Policy
{
public boolean implies(ProtectionDomain domain, Permission permission){

Principal[] subjects = domain.getPrincipals();
if(subjects !=null && subjects.length>0){
sub = subjects[0].getName();
}

Can any one help me out.

Thanks,
B.Saroj kumar

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