桥接模式

 /*汽车基类*/ 
public abstract class Car {     
   /**      * 安装导航仪      * @param navigator      */     
   public abstract void installNavigator(INavigator navigator);          
   /**      * 开启导航      * 开启导航是调用导航接口实现类的方法      */     
   public abstract void open(); 
}
 /*宝马牌汽车*/ 
public class BMWCar extends Car {   
   /**导航仪*/     INavigator navigator = null;          
   @Override     public void installNavigator(INavigator n) {       
     System.out.println("宝马成功安装了："+n.toString());         
     navigator = n;     
   }     
   @Override     public void open() {       
     navigator.work();     
   } 
 } 
 /*法拉利牌汽车*/ 
 public class FerrariCar extends Car {   
   /**导航仪*/     INavigator navigator = null;         
   @Override     public void installNavigator(INavigator n) {       
     System.out.println("法拉利成功安装了："+n.toString());        
     navigator = n;     
  }               
  @Override     public void open() {       
    navigator.work();     
  }      
 }
 /*导航仪接口*/ 
 public interface INavigator {      
 /**      *  导航实现      */  
   void work(); 
 }
 /*高德导航仪*/ 
 public class AmapNavigator implements INavigator {  
   @Override  public void work() {      
     System.out.println("我是高德导航仪！");  
   }     
   @Override     public String toString() {       
     return "【高德导航仪】";     
   } 
  } 
   /*北斗导航仪*/ 
  public class BdNavigator implements INavigator {   
     @Override     public String toString() {       
       return "【北斗牌导航仪】";     
     }          
     @Override     public void work() {       
       System.out.println("我是北斗导航仪！");     
     } 
  }

public class Main {   
  public static void main(String[] args) {       
    test1() ;         
    test1_1() ;          
  }     
  public static void test1(){       
    INavigator bdNavigator = new BdNavigator();         //法拉利安装北斗导航         
    Car ferrariCar = new FerrariCar() ;         
    ferrariCar.installNavigator(bdNavigator);         
    ferrariCar.open();     
  }     
  public static void test1_1(){         
    INavigator amapNavigator = new AmapNavigator();         //宝马安装了高德导航仪         
    Car ghostCar = new BMWCar();         
    ghostCar.installNavigator(amapNavigator);         
    ghostCar.open();     
  } 
}