I have a quick question.
What is the difference between the following:
String test = req.getParameter("Something").trim();
String test = "";
test = req.getParameter("Something").trim();
If Something is not in the querystring I get an error.
For some reason when i use the first example I get a nullpointer exception. If I use the second example it works with out a problem. I am using JRun 2.3.
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Viewers will learn one way to get user input in Java.
Introduce the Scanner object:
Declare the variable that stores the user input:
An example prompting the user for input:
Methods you need to invoke in order to properly get user input: