I am not getting the code snippet //generate three random numbers (I need explanation on working of Math.random()*oneLenghth and so on....)

import java.lang.Math; public class PhraseOMatic{ public static void main(String[]args){ //Make three set of words to choose from. Add your own! String[] wordListOne = {"24/7", "multi-Tier","30,000 foot","B-to-B","win-win","front-end","web-based","pervassive","smart","six-sigma","critical-path","dynamic"}; String[] wordListTwo = {"empowered","sticky","value-added","oriented","centric","distributed","clustered","branded","outside-the-box","positioned","networked","focused","leveraged","aligned","targeted","shared","cooperative","accelerated"}; String[] wordListThree={"process","tippin-point","solution","architecture","core competency","strategy","mindshare","portal","space","vision","paradigm","mission"}; // find out how many words in each list int oneLength = wordListOne.length; int twoLength = wordListTwo.length; int threeLength = wordListThree.length; //generate three random numbers int rand1 =(int) (Math.random()* oneLength); int rand2 = (int) (Math.random()* twoLength); int rand3 =(int) (Math.random()* threeLength); // now build a phrase String phrase = wordListOne[rand1] + " " + wordListTwo[rand2] + " " + wordListThree[rand3]; //print out the phrase System.out.println("What we need is a "+ phrase); } }