(even) || (!even)+ nNumber v2

 String one = "однозначное";
    String two = "двузначное";
    String three = "трехзначное";
    String even = "четное";
    String odd = "нечетное";
    String n = " число";
    if (number>=1 & number<=999){
        if (number%2 == 0)
            System.out.print (even + " ");
        else
            System.out.print (odd + " ");
        if (number>=1 & number<=9)
            System.out.print (one + n);
        if (number>=10 & number<=99)
            System.out.print (two + n);
        if (number>=100 & number<=999)
            System.out.print (three + n);
    }
}
}