Java tutorial
//package com.java2s; import java.util.ArrayList; public class Main { public static ArrayList<Double> matrixMinus(ArrayList<Double> a1, ArrayList<Double> a2) { ArrayList<Double> res = new ArrayList<Double>(); for (int i = 0; i < a1.size(); i++) { res.add(a1.get(i) - a2.get(i)); } return res; } }