I have a program that reads a file and then creates objects from the contents of the file. How can I create a linked list of objects and use it with the package class instead of creating and using an array of objects? I am not allowed to use any arrays of objects or any java.util. lists in this program.

Runner class:

import java.util.Scanner;

import java.io.*;

class Runner {

public static Package[] readFile() {

try {

File f = new File("input.txt");

Scanner sc = new Scanner(f);

double l, h, w;

int count = 0;

while(sc.hasNext()){

l = sc.nextDouble();

h = sc.nextDouble();

w = sc.nextDouble();

sc.nextLine();

count++;

}

}

}

catch (Exception e){

e.printStackTrace();

}

return array;

}

public static void getLargestPack(Package[] array) {

//finding largest package

Package maxp = array[0];

int maxpind = 0;

for(int i = 1; i < array.length; i++){

if(array[i].getVolume() > maxp.getVolume()) {

maxp = array[i];

maxpind = i;

}

}

System.out.println("index of largest package is " + maxpind);

maxp.printDimensions();

System.out.println("Volume: "+maxp.getVolume());

}

public static void main (String[] args) throws java.lang.Exception {

node newN = null;

node head = null;

node current = null;

Package[] array = readFile();

getLargestPack(array);

LinkedList = new LinkedList(

//cubic and non cubic packages

int c = 0, nc = 0;

for(int i = 0; i < array.length; i++){

if(array[i].isCube()) c++;

else nc++;

}

System.out.println("number of cubic packages are: " + c);

System.out.println("number of non cubic packages are: " + nc);

//details of cubic packages

float sum_vol = 0;

for(int i = 0; i < array.length; i++){

if(array[i].isCube()){

array[i].printDimensions();

sum_vol += array[i].getVolume();

}

}

System.out.println("average volume is: " + sum_vol/c);

}

}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Package Class:

import java.util.*;

import java.lang.*;

import java.io.*;

class Package{

private double l, h, w;

public Box (double l, double h, double w, int ) {

this.l = l;

this.h = h;

this.w = w;

}

public boolean isCube() {

return l == h && h == w;

}

public double getVolume() {

return l * w * h;

}

public void printDimensions() {

System.out.println("Dimensions in length, height, width: " + l + ", " + h + ", " + w);

}

}