Thread: Very new to Java, getting some syntax errors

Code for Main:

1 import java.util.ArrayList;
2 import java.util.Scanner;
3 
4 public class Main {
5 
6 public static void main(String[] args) {
7       ArrayList<Trivia> Questions = new ArrayList<>();
8       Questions.add(new Trivia("q1", "yes"));
9       Questions.add(new Trivia("q2", "2"));
10      Questions.add(new Trivia("q3", "5"));
11      int score = DoTrivia(Questions);
12      Results(score);
13  }
14
15  public static int DoTrivia(ArrayList<> q) {
16      int Score = 0;
17      Scanner scanner = new Scanner(System.in);
18      for (int i = 0; i < q.size(); i++) {
19          System.out.println(q.get(i));
20          String input = scanner.next();
21          if (input.toLowerCase().equals(q.get(i).qAns)) {
22              Score++;
23              System.out.println("Correct! You have " + Score + " points!");
24          } else {
25              System.out.println("Incorrect. The answer was " + q.get(i) + ". You have " + Score + " points.");
26          }
27      }
28      scanner.close();
29      return Score;
30  }
31  public static void Results(int Score){
32     if (Score >= 2) {
33          System.out.println("You won with " + Score + " points!");
34     } else {
35          System.out.println("You lost with " + Score + " points.");
36      }
37  }
38 }

Errors for it:
Identifier expected:15
Cannot resolve symbol 'qAns':21


Code for Trivia class...:

1 public class Trivia {
2   public Trivia(String QText, String qAns) {
3
4   }
5 }

Any ideas to better utilize the new class? (I made it as the new class was a requirement for the tutorial's exercise.)

Thanks!

Cannot resolve symbol 'QAns':21

Where is the variable QAns defined that is in scope where it is referenced?

The only declaration for QAns I see is as a local parameter to the Trivia class.
It looks like that variable needs to be saved in a variable in that class and a getter method declared that returns its value.


Note: import statements need to be before the class declaration.

Please copy the current code and paste it here.
The posted code will not compile because the import statements are inside of the class. They should be before the class.

Changing an ArrayList to a List should not cause the compiler error you got.

A problem with the posted code is that the import statements are inside of the class declaration. They need to be moved outside.

import java.util.ArrayList;
import java.util.Scanner;
 
public class Main {

it's throwing that error

Please copy the full text of the error message and paste it here.

doing q[i].QAns wouldn't throw errors.

Can you post the code that did not throw errors? The variable: QAns must have been declared in scope for the code to compile without errors.

Identifier expected :15

What line is line 15?

Cannot resolve symbol 'qAns' :21

Where is qAns declared? I do see the symbol qAns used in the posted code. What code did that come from?
I see a similar named variable: QAns

I therefore assume you did not copy the full text of the compiler's error messages and paste it, but rather typed them in and made some mistakes which make it hard to solve the problem if the posted error messages are not correct.

public static int DoTrivia(ArrayList<> q) {

There must be a class name within the <> to declare what type the list contains

if (input.toLowerCase().equals(q.get(i).qAns)) {

Where is qAns declared? It must be in scope (declared within the {}s) where it referenced.
See my post#2