CREATE TABLE TBCOMPANY
(
  COMPANYID         NUMBER(10)                  NOT NULL,
  COMPANY_ADDRESS   VARCHAR2(255 CHAR),
  COMPANY_DESC      VARCHAR2(255 CHAR),
  COMPANY_NAME      VARCHAR2(255 CHAR),
  COMPANY_TYPE_ID   NUMBER(10),
  COMPANY_VERTICAL  VARCHAR2(255 CHAR)
)ALTER TABLE TBCOMPANY ADD (
  PRIMARY KEY
(COMPANYID)
Code:
CREATE TABLE TBCOMPANYTYPE
(
  COMPANY_TYPE_ID    NUMBER(10)                 NOT NULL,
  COMPANY_TYPE_DESC  VARCHAR2(255 CHAR)
)ALTER TABLE TBCOMPANYTYPE ADD (
  PRIMARY KEY
(COMPANY_TYPE_ID)

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "TBCOMPANYTYPE")
public class TBCompanyType {
   
   public Integer company_id;
   public String company_type_desc;

   public TBCompanyType(){}
   
   public TBCompanyType(String companyTypeDesc) {
      
      this.company_type_desc = companyTypeDesc;
   }
   
   @Id
   @GeneratedValue
   @Column(name = "COMPANY_TYPE_ID")
   public Integer getCompany_type_id() {
      return company_id;
   }

   public void setCompany_type_id(Integer company_id) {
      this.company_id = company_id;
   }
   
   @Column(name = "COMPANY_TYPE_DESC")
   public String getCompany_type_desc() {
      return company_type_desc;
   }
   
   public void setCompany_type_desc(String companyTypeDesc) {
      company_type_desc = companyTypeDesc;
   }
   
   
   

}

Code:
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Table;



@Entity
@Table(name = "TBCOMPANY")
public class TBCompany  implements java.io.Serializable{
private Integer companyid;

   
   private String company_name;

   
   private String company_desc;

   
   private String company_vertical;

   
   private String company_address;
   
   /**
    *
    */
   private static final long serialVersionUID = 1L;
   
   public TBCompany(){}

   public TBCompany(String companyName, String companyDesc,
         String companyVertical, String companyAddress, Integer companyTypeId,TBCompanyType companyType) {
      
      
      this.company_name = companyName;
      this.company_desc = companyDesc;
      this.company_vertical = companyVertical;
      this.company_address = companyAddress;
      
      this.companyType = companyType;
   }

   
   
   
   
   
   private com.novire.DO.TBCompanyType companyType;
   
   public void setCompanyid(Integer companyid) {
      this.companyid = companyid;
   }
   
   @Id()
     @Column(name = "COMPANYID")
     @GeneratedValue
   public Integer getCompanyid() {
      return companyid;
   }

   
   @Column(name = "COMPANY_NAME", length = 255)
   public String getCompany_name() {
      return company_name;
   }

   public void setCompany_name(String companyName) {
      company_name = companyName;
   }
   @Column(name = "company_desc", length = 255)
   public String getCompany_desc() {
      return company_desc;
   }

   public void setCompany_desc(String companyDesc) {
      company_desc = companyDesc;
   }
   @Column(name = "company_vertical", length = 255)
   public String getCompany_vertical() {
      return company_vertical;
   }

   public void setCompany_vertical(String companyVertical) {
      company_vertical = companyVertical;
   }
   @Column(name = "company_address", length = 255)
   public String getCompany_address() {
      return company_address;
   }

   public void setCompany_address(String companyAddress) {
      company_address = companyAddress;
   }
   
   public void setCompanyType(com.novire.DO.TBCompanyType companyType) {
      this.companyType = companyType;
   }

   @ManyToOne(cascade = CascadeType.ALL)
   public TBCompanyType getCompanyType() {
      return this.companyType;
   }
   

   

}

public List<TBCompany> listCompany() {
      List<TBCompany> companies = null;
      try {
         session = HibernateUtil.getSessionFactory().getCurrentSession();
         transaction = session.beginTransaction();
//         companies = session.createQuery("from TBCompany").list();
         DetachedCriteria criteria = DetachedCriteria.forClass(TBCompany.class);
         Criteria criteria1 = criteria.getExecutableCriteria(session);
         companies = criteria1.list();
      } catch (Exception e) {
         e.printStackTrace();
      }
      return companies;
      
   }

Hibernate: select this_.COMPANYID as COMPANYID3_1_, this_.companyType_COMPANY_TYPE_ID as companyT6_3_1_, this_.company_address as company2_3_1_, this_.company_desc as company3_3_1_, this_.COMPANY_NAME as COMPANY4_3_1_, this_.company_vertical as company5_3_1_, tbcompanyt2_.COMPANY_TYPE_ID as COMPANY1_2_0_, tbcompanyt2_.COMPANY_TYPE_DESC as COMPANY2_2_0_ from TBCOMPANY this_ left outer join TBCOMPANYTYPE tbcompanyt2_ on this_.companyType_COMPANY_TYPE_ID=tbcompanyt2_.COMPANY_TYPE_ID
Aug 26, 2010 3:39:21 PM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 904, SQLState: 42000
Aug 26, 2010 3:39:21 PM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: ORA-00904: "THIS_"."COMPANYTYPE_COMPANY_TYPE_ID": invalid identifier

org.hibernate.exception.SQLGrammarException: could not execute query
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
...........................Many lines
Caused by: java.sql.SQLException: ORA-00904: "THIS_"."COMPANYTYPE_COMPANY_TYPE_ID": invalid identifier

   at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:124)

   ... 102 more