Pure Java ldap

Ldap.java

Hashtable env = new Hashtable(11);
authEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
authEnv.put(Context.PROVIDER_URL, "ldap://ldap.example.com:389";);
authEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
authEnv.put(Context.SECURITY_PRINCIPAL, userName);
authEnv.put(Context.SECURITY_CREDENTIALS, passWord);
try {
    DirContext authContext = new InitialDirContext(authEnv);
} catch (AuthenticationException authEx) {
    System.out.println("Authentication failed!");
} catch (NamingException namEx) {
    System.out.println("Something went wrong!");
    namEx.PrintStackTrace();
}