Java Input

JStew · 03-10-2003, 06:22 AM

I have been trying to find an efficient way to handle input with Java. It seems there are no simple answers.

This is what I have been trying to use: INPUT

There's an imported file here called ITPInput.java that you compile into the directory with your main .java file. It compiles and so does the main .java file but when I try to run java main.java i get this error:
Exception in main java.lang.NoClassDefFoundError: input

Does anyone know of a way for my programs to accept user input that is somewhat simple?

in pseudocode this is what im trying to do:

print "What is your name?"
input name

print "Hello, " + name

something that is really simple.

acid_kewpie · 03-10-2003, 07:14 AM

i seem to remember using system.in.read or something very similar. but that might have been a hack my university insisted on.

acid_kewpie · 03-10-2003, 07:21 AM

i seem to remember using system.in.read or something very similar. but that might have been a hack my university insisted on.

JStew · 03-10-2003, 08:02 AM

that would seem to make sense, but i think in this imported file it has to be a call by value, but after searching all morning, i think ill just stick with this import until something just hits me in the head....

pperon · 03-10-2003, 08:05 AM

I actually wrote this before I realized that you were probably interested in command line input. Sorry...

Code:

import javax.swing.JOptionPane;

public class InputDemo {
        public static void main(String argv[]) {
                String name = JOptionPane.showInputDialog("What is your name?");
                JOptionPane.showMessageDialog(null, "Hello, " + name, "Hello", JOptionPane.INFORMATION_MESSAGE);    
                System.exit(0);                                                                 
        }
}

...so here's the command line way:

Code:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class InputDemo2 {
                      
   public static void main (String argv[]) {
      System.out.print("What is your name? ");
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      String name = null;
      try {
         name = br.readLine();
      } catch (IOException ioe) { 
      }
      System.out.println("Hello " + name);

   }

}

Hope this help.

-Phil

JStew · 03-10-2003, 09:09 AM

Phil: yeah, i just needed the command line... i havent gotten into the applets and such just yet, but I'm sure I could use it very soon. Thanks!