错误代码：

java.lang.NullPointerException

 at sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264)

 at sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:219)

 at sun.awt.FontConfiguration.init(FontConfiguration.java:107)

 at sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:774)

 at sun.font.SunFontManager$2.run(SunFontManager.java:441)

 at java.security.AccessController.doPrivileged(Native Method)

 at sun.font.SunFontManager.<init>(SunFontManager.java:386)

 at sun.awt.FcFontManager.<init>(FcFontManager.java:35)

 at sun.awt.X11FontManager.<init>(X11FontManager.java:57)

 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)