splitting text

public class SplittingUp {
	public static void main(String args[]) {
		String str = "this is a long string. With lots of words. And other stuff. It just goes on and on and on";
		
		String[] strArray = str.split(" ");
		int slen = 20;
		String newStr = "";
		
		for (int i=0; i< strArray.length; i++) {
			newStr +=  strArray[i] + " ";
			if (newStr.length() > slen) {
				newStr = newStr.trim();
				newStr += "\n";
				slen +=20;
			}
		}
		System.out.println(str);
		System.out.println("12345678901234567890");
		System.out.println(newStr);
		
		
	}
}