相对路径得到ImageIcon和Image

public class CreateImageIcon
{
 public static ImageIcon createImageIcon(String path,String description, Class klass)
 {
  java.net.URL imgURL = klass.getResource(path);
  if (imgURL != null)
  {
  return new ImageIcon(imgURL, description);
  }
  else
  {
   System.err.println("Couldn't find file: " + path);
   return null;
  }
 }
}

下面就可以得到Image

return CreateImageIcon.createImageIcon(fileName, "", ImageTest.class).getImage();