Question

I want the integer results to print out into four columns. How can I do this from the following code?

import java.util.Random;

public class RanX {
public static void main(String[] args) {
int x;
int y;
  
   //pull from command line argument
x = Integer.parseInt(args[0]);
y = Integer.parseInt(args[1]);

   //for loop to generate random numbers   
for(int r = 0; r < x; r++){
double newr = Math.random()*y;
       int z = (int) newr;
   System.out.println(z);

   }
}
}

Answer 1

import java.util.Random;
import java.util.Scanner;

public class RanX {
  public static void main(String[] args) {
    int x;
    int y;

    if(args.length == 2) {
      //pull from command line argument
      x = Integer.parseInt(args[0]);
      y = Integer.parseInt(args[1]);
    }
    else{
      System.out.println("You did not provided two command line arguments");
      Scanner scanner = new Scanner(System.in);
      System.out.print("Enter value for x: ");
      x = scanner.nextInt();
      System.out.print("Enter value for x: ");
      y = scanner.nextInt();
    }

    //for loop to generate random numbers
    for(int r = 0; r < x; r++){
      if(r%4 == 0 && r!=0){
        System.out.println();
      }

      double newr = Math.random()*y;
      int z = (int) newr;
      System.out.print(z+" ");

    }
  }
}