import javax.naming.*;import javax.naming.directory.*;import java.util.Hashtable;/** * Demonstrates how to create an initial context to an LDAP server * using SSL. For this example to work, JSSE must be installed and * configured, and the issuer of the LDAP server's certificate must  * be in the JSSE trust store. * * usage: java Ssl */class Ssl {    public static void main(String[] args) {	// Set up environment for creating initial context        Hashtable<String, Object> env = new Hashtable<String, Object>(11);	env.put(Context.INITIAL_CONTEXT_FACTORY, 	    "com.sun.jndi.ldap.LdapCtxFactory");	env.put(Context.PROVIDER_URL, "ldap://localhost:636/o=JNDITutorial");	// Specify SSL	env.put(Context.SECURITY_PROTOCOL, "ssl");	// Authenticate as S. User and password "mysecret"	env.put(Context.SECURITY_AUTHENTICATION, "simple");	env.put(Context.SECURITY_PRINCIPAL, "cn=S. User, ou=NewHires, o=JNDITutorial");	env.put(Context.SECURITY_CREDENTIALS, "mysecret");	try {	    // Create initial context	    DirContext ctx = new InitialDirContext(env);	    System.out.println(ctx.lookup("ou=NewHires"));	    // ... do something useful with ctx	    // Close the context when we're done	    ctx.close();	} catch (NamingException e) {	    e.printStackTrace();	}    }}