Thread: Confused on Arrays

I am trying to do a shuffle program where I randomize a group of numbers and print them out so none repeat. I have the randomization right just not sure how to implement a users input with an array.

Thank you for any help.

p.s I am new to this community so anything I may do wrong as far as the way I post or anything of that nature please let me know.

import java.util.*;
 
public class Shuffle
{
public static int[] RandomizeArray(int[] array){
Random rgen = new Random();
 
 for (int i = 0; i<array.length; i++){
int randomPosition = rgen.nextInt(array.length);
int temp = array[i];
            array[i] = array[randomPosition];
            array[randomPosition] = temp;
  }
           return array; 
 }
public static void main(String [] args)
{
Scanner keyboard = new scanner(System.in);
System.out.println("Enter number of tracks");
int n = keyboard.nextInt();
array[n] = RandomizeArray(n);
System.out.println(array[n]);
}
}

I have it to where it will compile now. I am just confused as to the syntax in being able to implement my RandomizeArray and the users input in the main. I know this is a simple task but Im new and just looking for some help.

import java.util.*;
 
public class Shuffle
{
public static int[] RandomizeArray(int[] array){
Random rgen = new Random();
 
 for (int i = 0; i<array.length; i++){
int randomPosition = rgen.nextInt(array.length);
int temp = array[i];
            array[i] = array[randomPosition];
            array[randomPosition] = temp;
  }
           return array; 
 }
public static void main(String [] args)
{
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter number of tracks");
int n = keyboard.nextInt();
 
}
}

I have edited my code and dont understand why it doesnt work.

import java.util.*;
 
public class Shuffle
{
public static int[] RandomizeArray(int[] array){
Random rgen = new Random();
 
 for (int i = 0; i<array.length; i++){
int randomPosition = rgen.nextInt(array.length);
int temp = array[i];
            array[i] = array[randomPosition];
            array[randomPosition] = temp;
  }
           return array; 
 }
public static void main(String [] args)
{
Scanner keyboard = new Scanner(System.in);
int n;
System.out.println("Enter number of tracks");
n = keyboard.nextInt();
RandomizeArray(n);
System.out.println(RandomizeArray(n));
}
}