Java tutorial
import java.util.ArrayList; import java.util.List; public class Main { public static void main(String[] args) { for (String part : getParts("HelloWorldJava", 3)) { System.out.println(part); } } private static List<String> getParts(String string, int partitionSize) { List<String> parts = new ArrayList<String>(); int len = string.length(); for (int i = 0; i < len; i += partitionSize) { parts.add(string.substring(i, Math.min(len, i + partitionSize))); } return parts; } }