javase接口的联系

package zhang.javase.TestInterface;
/**

• 接口的运用
  *接口可以理解成usb接口,而手机,打印机可以看成接口的实现类
• @作者:小章鱼
  /
  public class TestUsb {
  public static void main(String[] args) {
  computer com = new computer();
  com.dowork(new pinter());
  System.out.println("--------------");
  Flash f = new Flash();
  com.dowork(f);
  System.out.println("--------------");
  // 接口实现匿名对象的实现(方法一)
  USB phone = new USB() {
  @Override
  public void start() {
  System.out.println(“phone is working”);
  }
  @Override
  public void end() {
  System.out.println(“phone is working over”);
  }
  };
  com.dowork(phone);
  System.out.println("--------------------");
  // 接口实现匿名对象的实现
  com.dowork(new USB() {
  @Override
  public void start() {
  System.out.println(“mac is working”);
  }
  @Override
  public void end() {
  System.out.println(“mac is working over”);
  }
  });
  }
  }
  /*
• @作者:小章鱼

*电脑类
*/
class computer {
//此处体现了接口的多态性
public void dowork(USB mydevice) {
System.out.println(“设备已被连接”);
mydevice.start();
System.out.println("please let size equals " + USB.size);
mydevice.end();
System.out.println(“已将你的设备安全退出”);
}
}

interface USB {
final double size = 12.5;

void start();

void end();

}

class pinter implements USB {
@Override
public void start() {
System.out.println(“printer is working”);
}

@Override
public void end() {
	System.out.println("printer is working over");
}

}

class Flash implements USB {
@Override
public void start() {
System.out.println(“flash is working”);
}

@Override
public void end() {
	System.out.println("flash is working over");
}

}