hey guys, this is my code so far, it genarate 10 numbers between 100-1000
what I want to ask how I can let the program ask how many numbers I need to genarate , and whats the lowers bound, instead of 10, the i can choose any number ?
also i wanna save the result in txt file ?
how i can do this guys ?
need your help please

import java.util.Random;

/** Generate random integers in a certain range. */
public final class RandomRange {

  public static final void main(String... aArgs){
    log("Generating random integers in the range 1..1000.");

    int START = 100;
    int END = 1000;
    Random random = new Random();
    for (int idx = 1; idx <= 10; ++idx){
      showRandomInteger(START, END, random);


  private static void showRandomInteger(int aStart, int aEnd, Random aRandom){
    if ( aStart > aEnd ) {
      throw new IllegalArgumentException("Start cannot exceed End.");
    //get the range, casting to long to avoid overflow problems
    long range = (long)aEnd - (long)aStart + 1;
    // compute a fraction of the range, 0 <= frac < range
    long fraction = (long)(range * aRandom.nextDouble());
    int randomNumber =  (int)(fraction + aStart);    
    log("Generated : " + randomNumber);

  private static void log(String aMessage){
3 Years
Discussion Span
Last Post by stultuske
This topic has been dead for over six months. Start a new discussion instead.
Have something to contribute to this discussion? Please be thoughtful, detailed and courteous, and be sure to adhere to our posting rules.