package com.dsj.sorting; import java.util.Arrays; import java.util.Scanner; public abstract class SortingUtils { int sizeOfArr; boolean dataTypeNumber = false; Object[] unsortedArr; Scanner sc; /** Take the size of the input and initialize the unsorted array. */ SortingUtils() { System.out.println("Enter the size of your list:"); sc = new Scanner(System.in); this.sizeOfArr = sc.nextInt(); initializeUnsortedArr(); } /** * Depending on the input provided, the sorting algorithm will sort the inputs. * If a number is provided it sorts the number based on their value. If the * input is anything but a number, it sorts based on its length. */ void initializeUnsortedArr() { System.out.println("Enter your items:"); String typeTestVar = sc.next(); if (isOfTypeNumber(typeTestVar)) { dataTypeNumber = true; unsortedArr = new Number[sizeOfArr]; unsortedArr[0] = Double.parseDouble(typeTestVar); for (int i = 1; i < sizeOfArr; i++) { unsortedArr[i] = sc.nextDouble(); } } else { unsortedArr = new String[sizeOfArr]; unsortedArr[0] = typeTestVar; for (int i = 1; i < sizeOfArr; i++) { unsortedArr[i] = sc.next(); } } sc.close(); } private boolean isOfTypeNumber(String typeTestVar) { return typeTestVar.matches("^[-\\+]?\\d*.?\\d+$"); } public void display() { System.out.println("The sorted array is: "); Arrays.stream(unsortedArr).forEach(System.out::println); } public void sort() { if (!dataTypeNumber) { this.sortArrayOfStrings(); } else { this.sortArrayOfNumbers(); } } /** * To be implemented by each sorting class. */ abstract void sortArrayOfNumbers(); abstract void sortArrayOfStrings(); }