need help about command line arguments

[elvin saflor]

anybody help me make program plss


when i input in command line 11 5 10 15 23

the output is

the highest number is: 23
the lowest number is: 5

use conditional operators or relational operators

thank you in advance ..

[Campbell Ritchie]

Welcome to the Ranch

We expect you to have something you can show us, so we can help you improve it. I presume you already know about command line arguments.

[Ivan Franko]

Would you like to finish this code?

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.NoSuchElementException;

public class JavaRanch {
	public static void main(String args[]) {

		List<Integer> list = new ArrayList<Integer>();
		int element;
		int min;
		int max;

		for (String s : args) {
			try {
				element = Integer.parseInt(s);
				list.add(element);
			} catch (NumberFormatException e) {
				System.err.println("Argument must be an integer");
				System.exit(1);
			}
		}
		try {
			min = Collections...;    // take a look at this
			max = Collections....; // take a look at this
			
		} catch (NoSuchElementException e) {
			System.out.println("No arguments");
		}

	}
}

[Wesleigh Pieters]

I will help put you onto the right track then come back with some code if you need help and we take it further ok deal?

you need to create an array of ints populated by parsing the main methods arguments into it.

then as a handy trick go look at the java.util.Arrays class and you should find a handy static methods in there that will do something to your array. from there it will be easy enough to call the relevant position of where the highest and lowest int should now be.

[Campbell Ritchie]

I would use a different technique, which I think is simpler, which neither of you has mentioned. I would not use a method of the Arrays class, nor of the Collections class. I am not convinced you even need an int[].

But please don’t post any more code. That post is a little too complete for my likings.

[Wesleigh Pieters]

I thought my solution was fairly simple, curious to see your answer after we get some more from OP

[Jeff Verdegan]

If all we want is lowest and highest, there's no need for an array or list (other than the String[] args for the command line args where he's getting the numbers from, but it could just as easily be done by reading from System.in with no array or list at all).

And even if we are using a List, we should never need to catch NoSuchElementException. That's an unchecked exception, and indicates a bug in our code.

[Wesleigh Pieters]

please can you guys pm me your proposed solution I am very curious.

[fred rosenberger]

Wesleigh Pieters wrote:please can you guys pm me your proposed solution I am very curious.

Forget about java...I am going to read to you a list of numbers over the phone. When I am done, you need to tell me the largest value I read and the smallest.

You have two small pieces of paper - each is only big enough for you to write down one number on it. You have a pencil, a pencil sharpener, an eraser, you can tell me to pause when I read them, and you do not have any idea how many numbers I am going to read.

How would you do it?

[Wesleigh Pieters]

Ivan already pm'd me and I get it, should have thought of it, very simple but efficient

[Campbell Ritchie]

I wrote out a solution yesterday which does not use the int[], and takes nine lines inside a method. Two of those lines consist entirely of { or }.

[elvin saflor]

anybody solve my question ? just simple code plss

thank you )

[Ivan Franko]

I can do it. but I am afraid, that after this Campbell Ritchie kill me..

[Wesleigh Pieters]

nope, I gave you a verbal solution, partial code was also give by another and Campbell and Ivan said there was an even simpler solution, you haven't even tried.

[Jeff Verdegan]

elvin saflor wrote:anybody solve my question ? just simple code plss

This site is NotACodeMill(←click).

[Campbell Ritchie]

You show us yours and we might show you ours.

I probably shall post my version of the solution, once we know you have handed in your version.

[Paul Witten]

Campbell Ritchie wrote:.... once we know you have handed in your version.

You guys are tough. A nice little student can't even steal intellectual labor from you.

[Campbell Ritchie]

Paul Witten wrote: . . . You guys are tough. . . .

You haven’t seen me in a bad mood!

[Campbell Ritchie]

This version has no input validation, and does everything in the main method, which is usually not a good idea. It might be better to pass args to the constructor of a class which extracts the values from the array.

public class MaxMinPrinter
{
   public static void main(String[] args)
   {
      int min = Integer.parseInt(args[0]);
      int max = min;
      for (String s : args)  // You do parse args[0] twice in this version
      {
         int i = Integer.parseInt(s);
         max = i > max ? i : max;
         min = i < min ? i : min;
      }
      System.out.printf("The largest and smallest values were %d and %d%n", max, min);
   }
}