How WebService returns a String [] of zero length

亡魂小石头

Hello prawns, I have a String [] of zero length from the server. Why is the Null value at the client? How can I tell if the server passed Null or zero-length String []?

浪客贼心

How do you declare a variable
String [] a;
with
String [] a = new String [0];

are different

亡魂小石头

I tried, and return new String[0] is also a null value after it reaches the client

zzy_daniel

This is because the server is lazy and does not pass a String with a length of 0. The client cannot get it and treat him as NULL.