I need help setting up a samll command line app that functions as a bank. I want to echo a small menu to the user and give the user choices on withdrawls, deposits etc. I understand how to accept parameters with the initial java command but don't know how to set it up to wait for additional input. Any advice is greatly appreciated.
thanks,
Dan
this is about the simplest form of user input. i pulled it out of my samples library, but it was probably originally from www.javaalmanac.com (as is most of my stuff :p)
public class UserInput {
public static void main (String[] args) {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println ("Enter some text");
String input = "";
try {
input = reader.readLine();
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("you typed: " + input);
}
}
The idiom with BufferedReader (for multiple lines of input) is:
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String line;
while((line = in.readLine()) != null) {
// line now contains one line of input
// when the user stops giving input, such as at end of file or when a user
// typing input enters control-d on unix systems, readLine will return null
// and this loop will end
}
Scanner apparently is now (as of JDK 1.5) the preferred way of doing this kind of thing, but I'm not very familiar with it.
