Multi Argument Input String

Question

What I'm trying to do

I'm trying to find an easy way to input multiple arguments in one String and pass parts of it on to get computed.

For example, terminal instructions are usually a String of multible instructions sudo foo bar = [sudo][foo][bar]

I don't know how to do this in java, or how it's supposed to be done.

So far I've tried

ArrayList<Integer> threadList = new ArrayList();


    Scanner scanner = new Scanner(System.in);




    public void printOptions(){
        System.out.println("[1]          > New Primefactordevision");
        System.out.println("[Number]     > Check Status of [Number]");
        System.out.println("[x] [Number] > Terminates Primefactordivision of [Number]");
        System.out.println("[x]          > Terminate");

    }

    public void chooseOperation(){
        printOptions();
        String choice = scanner.next();

        switch(choice){
            case "1":{}
            case "Number":{}
            case String.format("x %s",threadList.get(*choice- x somehow*).toString()):{}
            case "x":{}
        }

The program is supposed to terminate a thread, computing primefactors out of an integer, when you type x [integer contained by threadList].

So basically the String has 2 arguments. [x] and [integer].

While it's not a problem to use x plus a defined integer as static parameter, it's a problem to have part of the choice parameter dynamically allocated from somewhere else, being conditional.

How is this supposed to be done?

Afraid I'm not sure what you're asking - do you want to determine if a string contains x, a space, and then a number? If so a regex would be the best fit for that. — Michael Berry
– Michael Berry, Commented May 18, 2018 at 11:56
why not the same? and use split or regex to get the seperate parts — Stultuske
– Stultuske, Commented May 18, 2018 at 11:56
@berry120 if I understand him right, he wants to get an array of Strings from "[sudo][foo][bar]" with elements "sudo", "foo" and "bar" — Stultuske
– Stultuske, Commented May 18, 2018 at 11:57
@BlkPengu I have answered your question. feel free to try it out — Stultuske
– Stultuske, Commented May 18, 2018 at 11:57

Michael Berry · Accepted Answer · 2018-05-18 12:11:16Z

1

I'm trying to have an input composed of the letter x and an integer, of which the integer is to be computed further

If you want to determine if a string matches the format "x 123", where 123 is a number that may vary (and then extract that number), a regex with a matcher is your best bet.

String inputStr = "x 123";

Pattern pattern = Pattern.compile("x (\\d+)");
Matcher matcher = pattern.matcher(inputStr);
if(matcher.find()) {
    String num = matcher.group(1);
    System.out.println(num);            
}

answered May 18, 2018 at 12:11

Michael Berry

72.8k23 gold badges165 silver badges227 bronze badges

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

Comments

Jan Larsen · Accepted Answer · 2018-05-18 12:27:56Z

1

The following program will read a string and an int from the console and print them

import java.util.Scanner;

public class ScannerTest {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (true) {
            String s = sc.next();
            int i = sc.nextInt();
            System.out.println(s+"/"+i);
        }
    }
}

answered May 18, 2018 at 12:27

Jan Larsen

8716 silver badges15 bronze badges

Collectives™ on Stack Overflow

Multi Argument Input String

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related