/** Advanced from version 2 raw type (see code from "rep"). This is a simple skeleton on how to develop a powerful generic data structure in this case a Series object taking advantage of Java near light speed operations. */ import java.util.List; import java.util.Arrays; import java.util.ArrayList; import java.util.Collections; public class Program { public static void main(String[] args) { Integer[] keys = {1, 2, 3, 4, 5}; String[] values = {"Java", "Python", "Javascript", "C++", "Scala"}; Series myPl = new Series<>(keys, values); myPl.setTitle("My Favourite PLs"); myPl.add(6, "C"); myPl.add(7, "HTML\\CSS"); System.out.println(myPl); System.out.println("\nHTML is simply a mark-up language. Please eliminate that and replace it with C#.\n"); myPl.set(7, "C#"); System.out.println(myPl); System.out.println("\nWhoops!!! How dare we forget PHP. Let's insert it after Javascript...\n"); myPl.insert(3, 4, "PHP"); System.out.println(myPl); System.out.println("Ohh no! Two entries with the same key value. Let's rename the whole Series.\n"); Integer[] newKeys = {1,2,3,4,5,6,7,8}; myPl.renameKeys(newKeys); System.out.println(myPl); System.out.println("\n...and a stupid parting shot, just to demonstrate how powerful this script can dare, let's invert things over...\n"); Series myPl2 = myPl.invert(); myPl2.setTitle("Reversed version"); System.out.println(myPl2); System.out.println("\nHit like as you leave."); } } class Series{ private List keys = new ArrayList<>(); private List values = new ArrayList<>(); private String title = "No title"; public Series (K []keys, V [] values){ if(keys.length != values.length){ throw new IllegalArgumentException("Both arguments must be of equal lengths."); } this.keys.addAll(Arrays.asList(keys)); this.values.addAll(Arrays.asList(values)); } public Series (){ } public void renameKeys(K[] keys){ this.keys.clear(); this.keys.addAll(Arrays.asList(keys)); } private int max(Object[] c){ int max = 0; for(Object obj:c){ if((obj+"").length() > max) max = (obj+"").length(); } return max; } private String diffK(Object obj){ int diff = max(keys.toArray()) - (obj+"").length(); String s = obj + " "; for(int i=0; i invert(){ return new Series(values.toArray() , keys.toArray()); } public void add(K key, V value){ keys.add(key); values.add(value); } V get(K key){ return values.get(keys.indexOf(key)); } public void set(K key, V value){ values.set(keys.indexOf(key), value); } public void remove(K key){ // remove the pair associated with key values.remove(get(key)); keys.remove(key); } public void insert(int index, K key, V value){ keys.add(index, key); values.add(index, value); } public int size(){ return keys.size(); } public void setTitle(String title){ this.title = title; } public String getTitle(){ return title; } @Override public String toString(){ StringBuilder sb = new StringBuilder( "\n------------------------\n\t" + title + "\n------------------------\n"); for(int i = 0; i < size(); i++){ sb.append("| " + diffK(keys.get(i)) + "| ").append(diffV(values.get(i)) + " |\n"); } sb.append("------------------------\n"); sb.append("Size = " + size()); return sb.toString(); } }

Series v3 Generic