i was today on class and i had to basically make a program that ask you cases, a string (That i had to make a list with it) and count how many times something that is not "Eclipse" appears (On the case of the exercise they were games and "LoL" counts 2, not 1).
But at the moment of clearing the "activity" list the program trows java.lang.UnsupportedOperationException and i don't know why
package arrayList;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Arrays;
import java.util.List;
public class ShitList {
public static void main(String[] args) {
//Variables generals / Controladors
Scanner kyb = new Scanner(System.in);
List<String> activity = new ArrayList<String>();
ArrayList<Integer> spy = new ArrayList<Integer>();
int shitList = 0;
//Variables usuari
int laps = 0;
int hours = 0;
String usr = "";
//Demanem les els casos al usuari
laps = kyb.nextInt();
kyb.nextLine();
for (int i = 0; i < laps; i++) {
//Demanem la "Activity list"
usr = kyb.nextLine();
//Declarem un array temporal
String [] activitySplit;
//La guardem en un array
activitySplit = usr.split(" ");
//Pasem la array a arrayList
activity = Arrays.asList(activitySplit);
//Demanem quantes hores el Marc espia al Albert
hours = kyb.nextInt();
for (int x = 0; x < hours; x++) {
spy.add(kyb.nextInt());
}
for (int x = 0; x < hours; x++) {
if(spy.get(x) == 15) {
if (activity.get(0).equals("LoL")) {
shitList++;
}
else if (!activity.get(0).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 16) {
if (activity.get(1).equals("LoL")) {
shitList++;
}
else if (!activity.get(1).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 17) {
if (activity.get(2).equals("LoL")) {
shitList++;
}
else if (!activity.get(2).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 18) {
if (activity.get(3).equals("LoL")) {
shitList++;
}
else if (!activity.get(3).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 19) {
if (activity.get(4).equals("LoL")) {
shitList++;
}
else if (!activity.get(4).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 20) {
if (activity.get(5).equals("LoL")) {
shitList++;
}
else if (!activity.get(5).equals("Eclipse")) {
shitList++;
}
}else if (spy.get(x) == 21) {
if (activity.get(6).equals("LoL")) {
shitList++;
}
else if (!activity.get(6).equals("Eclipse")) {
shitList++;
}
}
}
System.out.println("Nivell de Shitlist: " + shitList);
/*Clears all the variables to start the next case, but for some reason, trows Exception in thread "main" java.lang.UnsupportedOperationException
at java.base/java.util.AbstractList.remove(AbstractList.java:167)
at java.base/java.util.AbstractList$Itr.remove(AbstractList.java:387)
at java.base/java.util.AbstractList.removeRange(AbstractList.java:598)
at java.base/java.util.AbstractList.clear(AbstractList.java:243)
at arrayList.ShitList.main(ShitList.java:143)
*/
activity.clear();
spy.clear();
shitList = 0;
}
kyb.close();
}
}
I know this code is a bit caothic, sorry.
