i'm confused with if

if statement is not working when it runs i get finished code

public class Main {
public static void main(String[] args) {

    String[] questans = new String[15];
    questans[0] = "quest?";

    questans[5] = "ans";

    Scanner scaner = new Scanner(System.in);
    System.out.println(questans[0]);
    String input = scaner.nextLine();
    if (input == questans[5]) {
        System.out.println("that's true");
    }

}}

just words just words just words just words just words just words just words just words just words just words just words just words just words just words just words just words just words just words