How to access IBM WCM library using JAVA API?

sad<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c-rt"%>
<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt"%>
<%@ taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt-rt"%>

<%@ taglib uri="/WEB-INF/tld/portal-internal.tld" prefix="wps-internal"%>
<%@ taglib uri="/WEB-INF/tld/resolver-v6.tld" prefix="portal-resolver"%>
<%@ taglib uri="/WEB-INF/tld/people.tld" prefix="pa"%>
<%@ taglib uri="/WEB-INF/tld/menu.tld" prefix="menu"%>

<%@ taglib uri="/WEB-INF/tld/engine.tld" prefix="wps"%>
<%@ page session="true" contentType="text/html"
 import="java.util.*,java.lang.*,com.ibm.portal.um.*,com.ibm.workplace.wcm.api.*"%>

<%@ taglib uri="/WEB-INF/tld/portal.tld" prefix="portal"%>

<%@ page import="java.util.*,javax.servlet.jsp.JspWriter,java.io.*"%>
<%@ page import="com.ibm.workplace.wcm.api.*"%>
<%@ page import="com.ibm.workplace.wcm.api.exceptions.*"%>
<%@page import="java.util.*"%>
<%@page import="java.io.*"%>
<%@page import="java.net.*"%>
<%@page import="java.text.*"%>

<%@ page

<c:set var="prefLanguage" value="ar" />
import="java.text.*,java.util.*,java.lang.*,java.util.logging.*,com.ibm.workplace.wcm.api.*,com.ibm.portal.um.*"%>
<wps:if locale="en">
 <c:set var="prefLanguage" value="en" />
</wps:if>

<wps:if locale="ar">

</wps:if>


<%
 try {
  DocumentId docId = null;
  DocumentIdIterator itemsIterator = null;

.getDocumentLibrary("Web Content");
Workspace myworkspace = WCM_API.getRepository()
    .getSystemWorkspace();

  if (myworkspace == null) {
   out.println("Unable to get a valid workspace.<br/>");
  } else {
   out.println("Found workspace<br/>");
  }
  myworkspace.login();

  //Set the workspace to the correct library.

  DocumentLibrary MyLibrary = myworkspace


out.print("<br/><br/>Document id: " + docId.getId());
if (MyLibrary == null) {
   out.println("Library is null<br/>");
  } else {
   out.println("<br/>My lib is not null");
   myworkspace.setCurrentDocumentLibrary(MyLibrary);
  }
  itemsIterator = myworkspace.findByName(
    DocumentTypes.AuthoringTemplate, "Article");
  docId = (DocumentId) itemsIterator.next();


itemsIterator = myworkspace.findByName(DocumentTypes.Content,
    "Sample Article");
  docId = (DocumentId) itemsIterator.next();
  out.print("<br/><br/>Document id: " + docId.toString());
  myworkspace.logout();
 }

 catch (Exception e) {

  out.println("Exception " + e.getMessage());
  e.printStackTrace();

}