Reading inputs in java

Question

Hello everyone I'm trying to improve my Java skills by solving some problems from ACM, now the thing is my sample input looks like this :

 3 100
 34 100
 75 250
 27 2147483647
 101 304
 101 303
 -1 -1

So at first I'm just trying to read them but its not working here is the java code:

import java.io.BufferedInputStream;
import java.util.Scanner;

public class Main {

    public static void main(String args[]) {
        Scanner stdin = new Scanner(new BufferedInputStream(System.in));
        while (stdin.hasNext()) {
            System.out.println(stdin.nextInt() + " and the next " + stdin.nextInt());
        }
    }
}

I'm trying to send these inputs as an argument, and not by reading them from file, here is how:

The program just spins(executes) but not printing anything. How can I fix this?

akf · Accepted Answer · 2010-04-05 12:37:32Z

5

The arguments you have specified in your wizard are not input to the program via std in. Instead, they are passed in in the String[] args arguments passed into your main method. As it looks as though you are running in Eclipse, you can go to the Console tab that gets generated and type into that window. Alternatively, you can iterate over the args param to get those values.

answered Apr 5, 2010 at 12:37

akf

39.6k8 gold badges89 silver badges96 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

npinti · Accepted Answer · 2010-04-05 12:46:04Z

1

I am not using Eclipse, but this should print the numbers you have inputed. You are passing the numbers as string arguments, so this: "3 100" is actually equal to

String str = 3 + " " + 100;

This should print the numbers:

public static void main(String[] args) 
{
    for (String arg : args)
    {
        System.out.println(arg);
    }
}

answered Apr 5, 2010 at 12:46

npinti

52.2k5 gold badges74 silver badges98 bronze badges

Comments

Roman · Accepted Answer · 2010-04-05 12:45:40Z

0

Try this:

Scanner sc = new Scanner (System.in);
while (sc.hasNextInt()) {
    System.out.println(sc.nextInt());
}

After you start the program you should provide some numbers as an input.

answered Apr 5, 2010 at 12:45

Roman

66.4k93 gold badges247 silver badges341 bronze badges

Collectives™ on Stack Overflow

Reading inputs in java

3 Answers 3

Comments

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Related