string not equal the same string in java?

hi i'am trying to check is user input is "e" or not but when i use if(input == "e") it always get false even if i enter "e" , i do not know why

public static void main(String [] args)
{

    Scanner in =new Scanner(System.in);
    LinkedList<Integer> lst = new LinkedList();
    String input = in.nextLine();

while (isInt(input)) {
        lst.add(Integer.parseInt(input));
        input = in.nextLine();
    }
// this if statement always false 
    if(input=="e")
    {
             Collections.sort(lst);
             for(int item: lst) {
                 System.out.println(item);
             }
    }
}