Improvements in http://pastebin.com/mRYB79BW

Montanhas.java

package teste;
import java.util.Scanner;

public class Montanhas {
    public static void main(String[] args) {
        String pos;
        boolean end = false;
        int peaks;
        int mountains;

        Scanner input = new Scanner(System.in);

        while (!end) {
            System.out.print("Posição das montanhas (Vertical/Horizontal):");
            pos = input.nextLine();

            System.out.print("Quantidade de montanhas:");
            peaks = input.nextInt();
            input.nextLine();

            if (pos.equals("Vertical")) {
                for (mountains = 0; mountains <= peaks - 1; mountains = mountains + 1) {
                    System.out.println("  x \n xxx \nxxxxx");
                }
            }

            if (pos.equals("Horizontal")) {
                for (mountains = 0; mountains <= peaks; mountains = mountains + 1) {
                    System.out.println("x \nxx \nx");
                }
            }

            System.out.println("Você quer continuar?");
            end = !input.nextLine().equals("sim");
        }
    }
}