Cómo convertir la cadena en espacio separado int en java

resetting temp to empty string after you parse it to create place for new digits.
that at the end of your string will be no space, so if (numbers.charAt(i) == ' ') { ary[j] = Integer.parseInt(temp); j++; } will not be invoked, which means you need invoke ary[j] = Integer.parseInt(temp);
Troubled Tamarin