Class is present. But it complaints

 package org.myorg;

 import java.security.PrivilegedExceptionAction;

 import org.apache.hadoop.conf.*;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileStatus;

 public class Write{

  public static void main(String args[]) {

    try {
        UserGroupInformation ugi = UserGroupInformation.createRemoteUser("hbase");

        ugi.doAs(new PrivilegedExceptionAction<Void>() {

            public Void run() throws Exception {

                Configuration conf = new Configuration();
                conf.set("fs.defaultFS", "hdfs://10.236.173.95:8020/user/hbase");
                conf.set("hadoop.job.ugi", "hbase");

                FileSystem fs = FileSystem.get(conf);


                 fs.createNewFile(new Path("/user/hbase/test"));

                 System.out.println("File Created");

                return null;
            }
        });
    } catch (Exception e) {
        e.printStackTrace();
    }
   }
 }

This is my java program. I have downloaded my jar from this site. I can see UserGroupInformation class is there. I checked createRemoteUser method is a member of this class.

I compile this program using

  javac -classpath hadoop-0.20.1-dev-core.jar -d Write/ Write.java

My directory structure contains

 jarfile WriteDirectory Write.java

I am getting the following error

 Write.java:16: error: cannot find symbol
        UserGroupInformation ugi =   UserGroupInformation.createRemoteUser("hbase");
                                                       ^
 symbol:   method createRemoteUser(String)
 location: class UserGroupInformation
 Write.java:18: error: cannot find symbol
        ugi.doAs(new PrivilegedExceptionAction<Void>() {
           ^
 symbol:   method doAs(<anonymous PrivilegedExceptionAction<Void>>)
 location: variable ugi of type UserGroupInformation
 2 errors

What could be the reason?