How can i read a string with nextToken() of StreamTokenizer

I need for my class paper to read a string from a file and i used the StreamTokenizer's method nextToken but i can not read a string with it. my code is:
StreamTokenizer st = new StreamTokenizer(the code that gets the input from the file)
String line;
while ((line !=br.readLine()) != null) {
String surname = (st.nextToken()).trim();
but it gets me some error of:
int can not be dereferenced
what should I do to get the string i need?

Look at the API for java.io.StreamTokenizer. In particular, look at the return type for nextToken().
Good luck.

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