public class Weihnachtsbaum
{
    public static void draw(int reihen)
    {
        int offset = reihen*4;
        String out = "";
        for(int ast=0; ast<reihen; ast++)
        {
            for(int zweig=0; zweig<3; zweig++)
            {
                out += multip(" ", offset-2*zweig)+multip("*",((2*zweig)+(ast*3)))+"|"+multip("*",((2*zweig)+(ast*3)))+"\n";
            }

            offset-=3;
        }
        out+= multip(" ", (reihen*4)-2)+"|"+multip(" ", 3)+"|";
        System.out.println(out);
    }

    private static String multip(String str, int n)
    {
        String out = "";
        for(int i=0; i<n; i++)
            out+=str;
        return out;
    }
}