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Set.java
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Set.java
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package com.dsaa.set;
import java.util.ArrayList;
public class Set {
private ArrayList<String> listOfStrings;
public Set() {
listOfStrings = new ArrayList<String>();
}
public Set(ArrayList<String> initialSet) {
listOfStrings = new ArrayList<String>(initialSet);
}
public Set union(ArrayList<String> comparisonSet){
Set combinedSet = new Set(listOfStrings);
for(int i = 0; i < comparisonSet.size(); i++) {
combinedSet.add(comparisonSet.get(i));
}
return combinedSet;
}
public Set intersection(ArrayList<String> comparisonSet){
Set combinedSet = new Set();
for (int i = 0; i < listOfStrings.size();i++) {
if(comparisonSet.contains(listOfStrings.get(i))) {
combinedSet.add(listOfStrings.get(i));
}
}
return combinedSet;
}
//The difference of the two arrays, for the first list
public Set setDifference(ArrayList<String> comparisonSet){
Set firstDifferencesSet = new Set();
for (int i = 0; i < listOfStrings.size();i++) {
if(!comparisonSet.contains(listOfStrings.get(i))) {
firstDifferencesSet.add(listOfStrings.get(i));
}
}
return firstDifferencesSet;
}
public Set symmetricDifference(ArrayList<String> comparisonSet){
Set allDifferencesSet = new Set();
for (int i = 0; i < listOfStrings.size();i++) {
if(!comparisonSet.contains(listOfStrings.get(i))) {
allDifferencesSet.add(listOfStrings.get(i));
}
}
for (int i = 0; i < comparisonSet.size();i++) {
if(!listOfStrings.contains(comparisonSet.get(i))) {
allDifferencesSet.add(comparisonSet.get(i));
}
}
return allDifferencesSet;
}
public boolean add(String newString) {
if(listOfStrings.contains(newString)) {
return false;
}
else {
listOfStrings.add(newString);
return true;
}
}
public boolean remove(String newString) {
if(listOfStrings.contains(newString)) {
listOfStrings.remove(newString);
return true;
}
else {
return false;
}
}
public void printContents() {
for(int i = 0; i < listOfStrings.size(); i++) {
System.out.println(listOfStrings.get(i));
}
}
public static void main(String[] args) {
ArrayList<String> setOne = new ArrayList<String>();
setOne.add("One");
setOne.add("Two");
setOne.add("Three");
setOne.add("Four");
setOne.add("Five");
setOne.add("Six");
ArrayList<String> setTwo = new ArrayList<String>();
setTwo.add("Four");
setTwo.add("Five");
setTwo.add("Six");
setTwo.add("Seven");
setTwo.add("Eight");
setTwo.add("Nine");
Set set = new Set(setOne);
System.out.println("*****");
set.union(setTwo).printContents();
System.out.println("*****");
set.intersection(setTwo).printContents();
System.out.println("*****");
set.symmetricDifference(setTwo).printContents();
System.out.println("*****");
set.setDifference(setTwo).printContents();
System.out.println("*****");
}
}