Chutes and Ladders

package chutesandladders;

import java.util.Random;
import java.util.Scanner;

public class ChutesAndLadders {

    public ChutesAndLadders() {
        runGame();
    }

    Scanner keyboard = new Scanner(System.in);
    int[] board = new int[25];
    int[] players, current;
    String[] names;
    int roll = 0, currentSpot = 0, hasWinner = 0, currentPlayer = 0, turns = 0;
    String currentName = new String();
    Random rand = new Random();

    private void runGame() {
        runSetup();
        System.out.println("Going in order of name entries.");
        runMain();
    }

    private void runSetup() {
        System.out.println("Welcome to Chutes and Ladders!");
        boolean enoughPlayers = false;
        do { // Gets the number of people playing
            System.out.println("How many players are participating?");
            try {
            players = new int[Integer.parseInt(keyboard.nextLine())];
            names = new String[players.length];
            current = new int[players.length];
            for(int i=0; i<current.length; i++) {current[i] = 0;}
            enoughPlayers = true;
            }
            catch(NumberFormatException nfe) {

            }
        } while (enoughPlayers == false);
        for(int i=0; i<players.length; i++) {
            System.out.println("Who is player " + (i+1) + "?");
            names[i] = keyboard.nextLine();
        }
    }

    private void runMain() {
        do {
            for(int i=0; i<players.length; i++) {
                currentPlayer = i + 1;
                if (i == 0) {
                    turns++;
                }
                System.out.println("Rolling for player " + currentPlayer + "...");
                rollDice();
                System.out.println(names[i] + " was on spot " + current[i] + ".");
                current[i] = current[i] + roll;
                currentSpot = current[i];
                currentName = names[i];
                System.out.println(names[i] + " rolled a " + roll + ".");
                if (current[i] >= 100) {
                    current[i] = 100;
                    hasWinner = 1;
                    System.out.println(names[i] + " landed on " + current[i] + ".");
                    break;
                }
                else {
                    System.out.println(names[i] + " landed on " + current[i] + ".");
                    checkSpots();
                    current[i] = currentSpot;

                    System.out.println(names[i] + " is now at spot " + currentSpot + ".");
                    System.out.println("Press enter to continue.");
                    keyboard.nextLine();
                }
            }
        } while (hasWinner == 0);
        System.out.println(currentName + " has won the game in " + turns + " turns!");

    }

    public void checkSpots() {
        switch (currentSpot) {
        case 1: {
            currentSpot = 38;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 4: {
            currentSpot = 14;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 9: {
            currentSpot = 31;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 16: {
            currentSpot = 6;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 21: {
            currentSpot = 42;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 28: {
            currentSpot = 84;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 36: {
            currentSpot = 44;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 47: {
            currentSpot = 26;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 49: {
            currentSpot = 11;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 51: {
            currentSpot = 67;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 62: {
            currentSpot = 19;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 64: {
            currentSpot = 60;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 71: {
            currentSpot = 91;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 80: {
            currentSpot = 99;
            System.out.println(currentName + " landed on a ladder!");
            break;
        }
        case 93: {
            currentSpot = 73;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 95: {
            currentSpot = 75;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        case 98: {
            currentSpot = 78;
            System.out.println(currentName + " fell down a slide!");
            break;
        }
        default: {
        }
        }
    }

    public void rollDice() {
        roll = rand.nextInt(6) + 1;
    }

    public static void main(String[] args) {
        new ChutesAndLadders();
    }
}