Output not showing for nested if else [duplicate]

i don't get the output for 'total' which was at the very last segment of the coding. i think there must be something wrong with the if else statement but i am not sure which one.

import java.util.Scanner; // Scanner is in the java.util package public class discount {

public static void main(String[] args) {
    // Create a scanner object

    Scanner sc = new Scanner (System.in);

    //declare variables
    double age=0;
    String government_servant,room;
    double price = 0;
    double day = 0;
    double total=0;
    

    //Prompt user to enter the input
    System.out.print("Type of room (Single | Double | Family ): ");
    room = sc.next();
    System.out.print("Enter your age : ");
    age = sc.nextInt ();
    System.out.print("Are you a government servant (yes or no): ");
    government_servant = sc.next();
    System.out.print("How many days you want to stay: ");
    day = sc.nextDouble();  
    System.out.print(room);

    //selection method
    if (room == "Single" || room == "single") {
       if (age > 60.0) {
          price = 185.0 * 0.85;
        }
       else if (government_servant == "yes" || government_servant == "Yes") {
          price = 185.0 * 0.9;
        }
       else {
          price = 185.0;
        }
     }  
    else if (room == "Double" || room == "double") {
        if (age > 60.0 ) {
           price = 219.0 * 0.85;
        }
        else if (government_servant == "yes" || government_servant == "Yes") {
           price = 210.0 * 0.9;
        }
        else {
           price = 210.0;
        }
     }
    else if (room == "family" || room == "Family") {
        if (age > 60.0 ) {
           price = 285.0 * 0.85;
        }
        else if (government_servant == "yes" || government_servant == "Yes") {
           price = 285.0 * 0.9;
        }
        else {
           price = 285.0;
        }
     }
    
    //mathematical operation
    total = price * day;     
    //display results
    System.out.println("Total payment : RM " + total );

}}