java.lang.IllegalArgumentException:Input == null的异常处理

问题如下; java.lang.ExceptionInInitializerError Caused by: java.lang.IllegalArgumentException: input == null! at javax.imageio.ImageIO.read(ImageIO.java:1388) at com.pleanwar.fiying.FlyingObject.loadImage(FlyingObject.java:52) at com.pleanwar.hero.HeroAirPlean.(HeroAirPlean.java:22) Exception in thre