how can i fix algorithms problem in login

i try to make login app in java for begginer level
i tried thease codes but it not works everything works true but if state did not work

this is my source code

public class Main {
    public static void main(String[] args) {
        String username = "admin";
        String password = "1234";

        String iuser;
        String ipass;

        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter Username");
        iuser = scanner.next();
        System.out.println("Enter Password");
        ipass = scanner.next();

        System.out.println(ipass);
        System.out.println(iuser);


       if(username == iuser ){
            System.out.println("Logged in");
            }
       else {

           System.out.println("not logged");

       }



    }
}

and this is the output

Enter Username
admin
Enter Password
1234
1234
admin
not logged

so how can i fix it

>Solution :

At username == iuser, it should be username.equals(iuser). See String.equals versus ==

Works for me after that.