converterbean.java

卡内基梅隆大学软件工程课件,很全面

/*
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */

import java.rmi.RemoteException; 
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.math.*;

public class ConverterBean implements SessionBean {
 
      BigDecimal yenRate = new BigDecimal("121.6000");
      BigDecimal euroRate = new BigDecimal("0.0077");

   public BigDecimal dollarToYen(BigDecimal dollars) {

      BigDecimal result = dollars.multiply(yenRate);
      return result.setScale(2,BigDecimal.ROUND_UP);
   }

   public BigDecimal yenToEuro(BigDecimal yen) {

      BigDecimal result = yen.multiply(euroRate);
      return result.setScale(2,BigDecimal.ROUND_UP);
   }

   public ConverterBean() {}
   public void ejbCreate() {}
   public void ejbRemove() {}
   public void ejbActivate() {}
   public void ejbPassivate() {}
   public void setSessionContext(SessionContext sc) {}

} // ConverterBean