我看到的代码：
static Class class$java$lang$Byte; /* synthetic field */
static Class class$java$lang$Character; /* synthetic field */
static Class class$java$lang$Double; /* synthetic field */
static Class class$java$lang$Float; /* synthetic field */
static Class class$java$lang$Integer; /* synthetic field */
static Class class$java$lang$Long; /* synthetic field */
static Class class$java$lang$Short; /* synthetic field */
有谁知道他们是在做什么啊？