一个关于image的奇怪异常 Uncaught error fetching image:

[meng_taiqian]

控制台给出的异常信息如下：
Uncaught error fetching image:
java.lang.NullPointerException
at sun.awt.image.URLImageSource.getConnection(URLImageSource.java:97)
at sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:107)
at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:240)
at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)
at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)
而经过调试发现出错的代码是：
private Color initialColor = FWT.COLOR_MSGTEXT_FOREGROUND;
类FWT中：public static final Color COLOR_MSGTEXT_FOREGROUND = Color.RED;
请问这里出现空指针异常时闹哪样，而且我这里也没有任何和image相关的东西啊！！！！！！分数不多，麻烦各位大神帮忙分析下！！

[meng_taiqian]

有人吗？？？？？？

[业余草]

又得，java窗体不懂