Why is my random number generator not producing an output?

So for my java program, I am required to write a while loop with an if else statement that allows one to enter in a guess for the season, which is randomly generated by assigning a season to a number generated from 1 to 4. When I compile I get no errors, but when I execute the program, I get zero for all guesses. Is there something I'm missing in the number generation? Or is it in the string comparison?

Here is the code and the variables needed:

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

        //Variables for seasons counter 
        int summerSeasonCounter=0;
        int fallSeasonCounter=0;
        int springSeasonCounter=0;
        int winterSeasonCounter=0;
        int number;
        int limit = 4;
        Scanner keyboard = new Scanner(System.in);

        int count = 0;       // Counter for total number of iterations or loops
        String season = "";//Variable for season    
        final int NUMBER = 15;  // Number of while loop iterations
        String userGuess;//save user guess here


       // A random number generator
       Random generator = new Random();

       while(count < NUMBER)
       {
         number = generator.nextInt(limit);
         if(number == 1)
         {
          season.equals("summer");
         }
        else if(number == 2)
         {
          season.equals("spring");
         }
         else if(number == 3)
        {
          season.equals("fall");
        }
         else if(number == 4)
        {
         season.equals("winter");
        }

        System.out.print("Guess the season generated by the random number generator:");
        userGuess = keyboard.nextLine();
        if(userGuess.equalsIgnoreCase(season))
        {
         summerSeasonCounter += 1;
        }
         else if(userGuess.equalsIgnoreCase(season))
        {
          springSeasonCounter += 1;
        }
        else if(userGuess.equalsIgnoreCase(season))
        {
          fallSeasonCounter += 1;
        }
         else if(userGuess.equalsIgnoreCase(season))
        {
          winterSeasonCounter += 1;
        }
          count +=1;
        }

    // Display the results
       System.out.println ("You guessed Summer season correctly     "+summerSeasonCounter+" number of times.");
       System.out.println ("You guessed Fall season correctly "+fallSeasonCounter+" number of times.");
       System.out.println ("You guessed Spring season correctly "+springSeasonCounter+" number of times.");
       System.out.println ("You guessed Winter season correctly "+winterSeasonCounter+" number of times.");

    }
}