Use this markup in a class to make a connection to an LDAP server.

package com.example;

import java.util.Properties;
import javax.naming.Context;
import javax.naming.ldap.InitialLdapContext;

public class ldapDemo {

  public static void main(String[] args) throws Exception {

    Properties env = new Properties();
    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, "ldap://example.com:389");
    env.put(Context.SECURITY_AUTHENTICATION, "simple");
    env.put(Context.SECURITY_PRINCIPAL, "your_username");
    env.put(Context.SECURITY_CREDENTIALS, "your_password");

    try {
      new InitialLdapContext(env, null);  
      System.out.println("Successfully connected to LDAP");
 
    } 

    catch (AuthenticationException ex) {
         System.out.println("Failed - Unable to connect to LDAP");
          ex.printStackTrace();
    }  
  }
}