Hey guys I need help reading input into an ArrayList which I will use to construct my polynomials

any ideas on how to do this ??

My code is below

*/ package poly; import java.util.ArrayList; import java.util.Scanner; /** * * */ public class Poly { private ArrayList<Integer> coefficients; public Poly() { } public Poly(ArrayList<Integer> coefficient) { this.coefficients = coefficient; } public void show() { for (int i = coefficients.size() - 1; i >= 0; i--) { if(coefficients.get(i)>=0 && i!=coefficients.size()-1) { System.out.print("+"); } System.out.print(coefficients.get(i)); if (i != 0) { System.out.print("x"); System.out.print("^" + i); System.out.print(" "); } } System.out.println("");// prints new line } public Poly add(Poly otherPoly) { //We are going to add the coefficients of the current object as well as the //object that is being passed on to the method ArrayList<Integer> sum = new ArrayList<Integer>(); //We are checking if the degree of coefficients of the current object and the //object being passed into the method are the same if (this.coefficients.size() == otherPoly.coefficients.size()) { //Iterating over each element in the object. for (int i = 0; i < coefficients.size(); i++) { //Adding the coefficients of the currrent object and the correspondeing //coefficients the object that is being passed. sum.add(this.coefficients.get(i) + otherPoly.coefficients.get(i)); } } //Creating a new polynomial to pass the arraylist that has just been created. Poly sumPoly = new Poly(sum); //Returning the polynomial. return (sumPoly); } public Poly subtract(Poly otherPoly) { //We are going to add the coefficients of the current object as well as the //object that is being passed on to the method ArrayList<Integer> takeAway = new ArrayList<Integer>(); //We are checking if the degree of coefficients of the current object and the //object being passed into the method are the same if (this.coefficients.size() == otherPoly.coefficients.size()) { //Iterating over each element in the object. for (int i = 0; i < coefficients.size(); i++) { //Adding the coefficients of the currrent object and the correspondeing //coefficients the object that is being passed. takeAway.add(this.coefficients.get(i) - otherPoly.coefficients.get(i)); } } //Creating a new polynomial to pass the arraylist that has just been created. Poly takeAwayPoly = new Poly(takeAway); //Returning the polynomial. return (takeAwayPoly); } public void read() { Scanner in= new Scanner(System.in); System.out.println("Please Enter the degree of the polynomial"); int degree=in.nextInt(); for(int i=0; i<=degree; i++) { System.out.println("Please enter the enter coefficient for the"+ i+"exponent"); } int[] coefficientArray=new int[degree]; } //MAIN CLASS BELOW public static void main(String[] args) { // int[] coefficient = {4, 3, 2}; ArrayList<Integer> coefficients = new ArrayList<Integer>(); coefficients.add(4); coefficients.add(2); coefficients.add(1); coefficients.add(4); Poly one = new Poly(coefficients); ArrayList<Integer> coefficients_2 = new ArrayList<Integer>(); coefficients_2.add(5); coefficients_2.add(3); coefficients_2.add(1); coefficients_2.add(5); Poly two = new Poly(coefficients_2); one.show(); two.show(); //Need to confirm if not printing the error mesage is okay. Poly three = one.subtract(two); three.show(); Poly four = one.add(two); four.show(); } }