how to accept i/p's from user

[amal shah]

how to accept i/p's from user in a command prompt?

when we want to print data to standard o/p we use system.out.print(data)
..but how do we accept data from user and store it in a variable
/*system.in()...*/ is it? or is something to do with Handler class

i am beginner pls help!
Thank's
amal

[Stephen Foy]

I presume you mean by "ips" as inputs, not a users actual IP address.
You can get input from a user by using the "Scanner" class.

import java.util.Scanner; << imports the scanner class
 
Scanner in = new Scanner(System.in) << Creates a new scanner object in
 
System.out.println("Enter a number: "); 
int number = in.nextInt(); << read the input

[Ellie Barnes]

If you are indeed looking for command line input, you could also do it this way:

    
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String userin = reader.readLine();
 

You would need to provide some exception handling to go with this too, enclose your code in a try.......catch block.

Event handling which you mention is usually used to get input from a GUI (e.g. a user clicks a button), whereas this kind of system prompt input is not event driven (maybe it can be?)

Hope that's helpful


[ June 03, 2006: Message edited by: Ellie Barnes ]

[amal shah]

thank's ellie that helped...stephen the scanner class don't seem to appear in java doc 1.4..well how to go about with this scanner class

[marc weber]

Originally posted by amal shah:
thank's ellie that helped...stephen the scanner class don't seem to appear in java doc 1.4..well how to go about with this scanner class

The java.util.Scanner was new with Java 1.5. So if you're using 1.4 or earlier, you should use the approach outlined by Ellie.

Or you can upgrade to Java 5.0.

[Charles Lyons]

Or you can upgrade to Java 5.0.

Or indeed look forward to the new java.io.Console class in Java SE 6!

[Edwin Dalorzo]

Could use Jakarta Commons CLI, also.