package com.bjpowernode.adapter; 
 
/** 
 * PS2接口，圆口 
 * @author eason 
 * 
 */ 
public interface PS2Port { 
  public void workWithPS2(); 
} 

package com.bjpowernode.adapter; 
 
/** 
 * USB接口，U口 
 * @author eason 
 * 
 */ 
public interface USBPort { 
  public void workWithUSB(); 
} 
 

package com.bjpowernode.adapter; 
 
/** 
 * 对象适配器 
 * 将PS2接口装换成USB接口 
 * 所以此类类型是USB接口(implements USBPort) + 成员变量ps2Port 
 * @author eason 
 * 
 */ 
public class PS2ToUSB implements USBPort{ 
 
  private PS2Port ps2Port; 
   
  public PS2ToUSB(PS2Port ps2Port) { 
    this.ps2Port = ps2Port; 
  } 
   
  @Override 
  public void workWithUSB() { 
    System.out.println("转换的关键在这里,本来是"); 
    ps2Port.workWithPS2(); 
    System.out.println("经过你的转换，现在是USB工作中"); 
  } 
   
} 
 

package com.bjpowernode.adapter; 
 
/** 
 * 测试类 
 * client 
 * @author eason 
 * 
 */ 
public class TestAdapter { 
 
  public static void main(String[] args) { 
    //我现在有一个PS2接口 
    PS2Port ps2Port = new PS2Port() { 
      @Override 
      public void workWithPS2() { 
        System.out.println("PS2工作中"); 
      } 
    }; 
     
    //但是我需要的是一个USB接口啊,对我(client)来说，我只认识USB接口 
    //经过PS2ToUSB的转换，PS2接口变成了USB接口 
    USBPort ps2ToUsbPort = new PS2ToUSB(ps2Port); 
     
    ps2ToUsbPort.workWithUSB(); 
     
  } 
 
} 

package com.bjpowernode.adapter; 
 
/** 
 * 类适配器 
 * @author eason 
 * 
 */ 
public class PS2ToUSB implements USBPort, PS2Port{ 
 
  //重写workWithUSB，把工作交给workWithPS2 
  @Override 
  public void workWithUSB() { 
    workWithPS2(); 
  } 
   
}