class CAAddressAdapter extends AddressValidator { 
  private CAAddress objCAAddress; 
  public CAAddressAdapter(CAAddress address) { 
    objCAAddress = address; 
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  } 
  public boolean isValidAddress(String inp_address, 
     String inp_zip, String inp_state) { 
    return objCAAddress.isValidCanadianAddr(inp_address, 
           inp_zip, inp_state); 
  } 
}//end of class 

　　当客户对象调用CAAddressAdapter（adapter）上的isValidAddress方法时, 适配器在内部调用CAAddress(adaptee)上的isValidCanadianAddr方法。

 
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　　Figure 20.7: Address Validation Application?Using Object Adapter

　　从这个例子可以看出，适配器可以使Customer（client）类访问借口不兼容的CAAddress(adaptee)所提供的服务！