How to insert xml file data to atble having column type as xmltype

Hello , I have a table defined as

CREATE TABLE TEST_TABLE (docid VARCHAR2(200), type VARCHAR2(200),xmlfile XMLTYPE) ;

and from java , i m trying to insert xml data as below

 String query = "INSERT INTO TEST_TABLE (docid,type,xmlfile) VALUES (?,?,XMLType(?)) ";

     

      // Get the statement Object

      PreparedStatement statement = jdbcConection.getJdbcConnection().prepareStatement(query);

      // Get the OracleClob instance from xmlString

      statement.setString(1, "0BCFF8F0");

      statement.setString(2, "Topic");

      clob =(OracleClob) jdbcConection.getJdbcConnection().createClob();

      clob.setString(1, "am new to xml db");   

      statement.setObject(3, clob);

      // Execute the prepared statement

      if (statement.executeUpdate () == 1)

      {

        System.out.println ("Successfully inserted");

      }

getting the error java.sql.SQLException: ORA-22922: nonexistent LOB value