Java中参数的省略号表示类型的vararg.因此,在您的情况下,…意味着您可以将任意数量的String参数传递给doInBackground方法.

因此,您可以调用此方法doInBackground(“String1”,“String2”,“String3”)或doInBackground(“String1”)或doInBackground(“String1”,“String3”,“String4”)或任何其他形式.

The three periods after the final parameter’s type indicate that the final argument may be passed as an array or as a sequence of arguments. Varargs can be used only in the final argument position. Given the new varargs declaration for MessageFormat.format,the above invocation may be replaced by the following shorter and sweeter invocation

最后有它的通常含义.顺便说一句,这个功能在Java5或更新版本中可用.

正如以上两个链接所提到的,它只不过是含糖的数组.基本上,当你定义myMethod(T … vararg)时,Java会将其视为myMethod(T [] vararg).当你调用myObj.myMethod(t1,t2,t3,…,tn)时,Java将它传递给myObj.myMethod(new T [] {t1,tn}).