Try catch problem in a while loop

Question

I have computerGuess set to -1 and that starts the while loop.
but I need to catch exceptions that the user doesnt enter a string or anything other than a number between 1 and 1000.
but computerGuess is an int so that the while loop will start and I wanted to reset computerGuess from the user input using nextInt().
The problem is if I want to catch exceptions I have to take a string and parse it.
import java.util.Scanner;
public class Game {
     //initiate variables
     String computerStart = "yes";
     String correct = "correct";
     String playerStart = "no";
     int computerGuess = 500;
public void Start()
     //setup scanner
     Scanner input = new Scanner(System.in);
     int number = (int)(Math.random()*1001);
     System.out.println(welcome());
     String firstAnswer = input.nextLine();
     if(firstAnswer.equalsIgnoreCase(computerStart)== true)
          System.out.println(computerGuess());
          //while (userAnswer.equalsIgnoreCase(correct) == false){
               System.out.println();
     if(firstAnswer.equalsIgnoreCase(playerStart) == true)
          long startTime = System.currentTimeMillis();
          int currentGuess = -1;
          while (currentGuess != number){
          System.out.println(playerGuess());
          String guess = input.next();
          //currentGuess = Integer.parseInt(guess);
          if (currentGuess < number)
               System.out.println("too low");
          if (currentGuess > number)
               System.out.println("too high");
          if (currentGuess == number)
               long endTime = System.currentTimeMillis();
               System.out.println("Well done, the number is " + number);
          int i = -1;
          try {
            i = Integer.parseInt(guess);
               } catch (NumberFormatException nfe) {
                    //System.out.println("Incorrect input, please try again.");
          if ( i < 0 || i > 1000 ) {
               System.out.println("Incorrect input, please try again.");
     private String computerGuess()
           String comGuess = ("The computer will guess your number.\n" +
                    "Please enter \"too high\", \"too low\" or \"correct\" accordingly.");
           return comGuess;
     private String welcome()
          String gameWelcome = "Welcome to the guessing game \n" +
                                    "The objective is to guess a number between 1 and 1000.\n" +
                                    "You can guess the computer's number or it can guess your's.\n" +
                                    "You may enter \"quit\" at any time to exit.\n" +
                                    "Would you like the computer to do the guessing?";
          return gameWelcome;
     private String playerGuess()
          String playerWillGuess = "Guess a number between 1 and 1000.";
          return playerWillGuess;
}The catch works , but because computerGuess is int -1 so that the while loop will run, I cannot use the input to change computerGuess because it is a string.

Answer 1

the i was a mistake. and i commented on the other code, because it wasnt working at that moment. I need help understanding the try catch method.
I want to catch any input that isn't an integer , and I would also like to catch any input that isn't a string at other parts of my program.