RandomGenTest.java Source code

Introduction

Here is the source code for RandomGenTest.java

Source

import java.util.HashMap;
import java.util.Map;
import org.apache.commons.math3.random.RandomDataGenerator;

/*
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/**
 *
 * @author kaeru
 */
public class RandomGenTest {
    public static void main(String[] args) {
        RandomDataGenerator rand = new RandomDataGenerator();

        Map<Object, Integer> map = new HashMap();
        for (int i = 0; i < 101; i++)
            map.put(i, 0);

        Map<Object, Integer> user = new HashMap();
        for (int i = 0; i < 100; i++) {
            int age = rand.nextInt(0, 100);
            /*int age = (int) rand.nextGaussian(50, 10D);
            if ((age > 100) || (age < 0)) {
               age = rand.nextInt(0, 100);
            }*/
            user.put(i, age);
        }

        for (int i = 0; i < 100000; i++) {
            //int age = rand.nextInt(0, 100);
            /*int age = (int) rand.nextGaussian(50, 10D);
            if ((age > 100) || (age < 0)) {
               age = rand.nextInt(0, 100);
            }*/

            //Seq
            //map.put(user.get(i%100), map.get(user.get(i%100))+1);

            //Rand
            int j = rand.nextInt(0, 99);
            map.put(user.get(j), map.get(user.get(j)) + 1);
        }

        display(map);
    }

    //Display
    public static void display(Map<Object, Integer> map) {
        for (Object age : map.keySet()) {
            System.out.print(age + "," + map.get(age) + " ");
            int l = map.get(age) / 50;
            for (int i = 0; i < l; i++)
                System.out.print("*");

            System.out.println("");
        }
    }
}