Java Utililty Methods Random Int

List of utility methods to do Random Int

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Description

The list of methods to do Random Int are organized into topic(s).

Method

intrandomNumber(int min, int max)
Generates a random number 
return (int) (Math.random() * max + min);
intrandomNumber(int minimum, int maximum)
random Number 
return (int) (Math.random() * maximum + minimum);
intrandomNumberBetweenIntervals(int min, int max)
Returns a random number from the specified range 
if (min >= max) {
    throw new IllegalArgumentException("The minimum bound cannot be larger or equal to the maximum bound!");
return min + (int) (Math.random() * ((max - min) + 1));
intrandomNumberWithinRange(int low, int high)
random Number Within Range 
int result = (int) (Math.random() * (high - low + 1)) + low;
return result;
IntegerrandomNumberWithinRange(int min, int max)
Returns a random number within the given range. 
return ((int) (Math.random() * max)) + min;
StringrandomPass(int n)
Questo metodo viene utilizzato per la generazione di una password Random 
String caratteriValidi = "";
String temp = "";
double icasuale = 0;
caratteriValidi += "abcdefghijklmnopqrstuvwxyz0123456789@!";
for (int i = 0; i < n; i++) {
    icasuale = Math.floor(Math.random() * caratteriValidi.length());
    temp += caratteriValidi.charAt((int) icasuale);
return temp;
float[]randomPointInConvexPoly(float[] pts, int npts, float[] areas, float s, float t)
random Point In Convex Poly 
float areasum = 0.0f;
for (int i = 2; i < npts; i++) {
    areas[i] = triArea2D(pts, 0, (i - 1) * 3, i * 3);
    areasum += Math.max(0.001f, areas[i]);
float thr = s * areasum;
float acc = 0.0f;
float u = 0.0f;
...
double[][]randomPointsFromFigureEight(int n)
random Points From Figure Eight 
if (n <= 0) {
    throw new IllegalArgumentException();
double[][] result = new double[n][2];
for (int i = 0; i < n; i++) {
    double theta = 2 * Math.PI * Math.random();
    double x = Math.cos(theta);
    double y = Math.sin(theta);
...
double[][]randomPointsFromUnitSphere(int n)
random Points From Unit Sphere 
if (n <= 0) {
    throw new IllegalArgumentException();
double[][] result = new double[n][3];
for (int i = 0; i < n; i++) {
    double phi = Math.PI * Math.random();
    double theta = 2 * Math.PI * Math.random();
    double x = Math.cos(theta) * Math.sin(phi);
...
double[][]randomPointsFromUnitSquare(int n)
random Points From Unit Square 
if (n <= 0) {
    throw new IllegalArgumentException();
double[][] result = new double[n][2];
for (int i = 0; i < n; i++) {
    result[i][0] = Math.random();
    result[i][1] = Math.random();
return result;