My code is not working, No idea where is the mistake

Question

import java.util.Scanner;
 
public class ReturnÜbung_2{
 
    public static String userData(){
 
        Scanner userInput = new Scanner(System.in);
        System.out.println("Geben Sie bitte Ihren Namen ein: ");
        String name = userInput.nextLine();
        System.out.println("Geben Sie bitte Ihren Nachnamen ein: ");
        String nachname = userInput.nextLine();
 
        String userInfo;
 
        if (name == "Bangoo" && nachname == "Mangoo")
           {
            System.out.println("You are cool!!");
            userInfo = name + " " + nachname;
        }  else {
            System.out.println("Your are not cool!! ");
            userInfo = "Yor are not " + "Bangoo" + " " + "Mangoo";
        }
 
        return  userInfo;
    }
 
    public static void main(String [] args){
        String userInfo= userData();
 
        System.out.println(userInfo);
    }
    
}//end of class Return

Can anyone please explain me why my code is not working properly?

The else part is working and the if part is not working. I mean no matter what for an input you give, it always executes the else condition.

And please if possible give me some tips and optimize my code.