Java/src/main/java/com/examplehub/utils/RandomUtils.java at master · examplehub/Java · GitHub

History

64 lines (58 loc) · 1.81 KB

Raw

package com.examplehub.utils;

import java.util.Random;

public class RandomUtils {

/**

* Generate random int numbers in a range.

* @param min the min value of random numbers.

* @param max the max value of random numbers.

* @param count the count of random numbers.

* @return {@code count} random numbers from {@code min} to {@code max} range.

public static int[] randomInts(int min, int max, int count) {

if (min > max) {

throw new IllegalArgumentException("min value must be less than or equals to max");

}

int[] ints = new int[count];

Random random = new Random();

for (int i = 0; i < count; ++i) {

ints[i] = min + random.nextInt(max - min + 1);

}

return ints;

}

/**

* Generate random double numbers in a range.

* @param min the min value of random numbers.

* @param max the max value of random numbers.

* @param count the count of random numbers.

* @return {@code count} random numbers from {@code min} to {@code max} range.

public static double[] randomDoubles(double min, double max, int count) {

if (min > max) {

throw new IllegalArgumentException("min value must be less than or equals to max");

}

double[] floats = new double[count];

Random random = new Random();

for (int i = 0; i < count; ++i) {

floats[i] = min + random.nextFloat() * (max - min);

}

return floats;

}

/**

* Generate random letters.

* @param count the count of random letters.

* @return {@code count} random letters.

public static String randomLetters(int count) {

int min = 0;

int max = 127;

int[] chars = randomInts(min, max, count);

StringBuilder buffer = new StringBuilder();

for (int aChar : chars) {

buffer.append((char) aChar);

}

return buffer.toString();

}

Java/src/main/java/com/examplehub/utils/RandomUtils.java at master · examplehub/Java · GitHub

Uh oh!

Expand file tree

Breadcrumbs

RandomUtils.java

Latest commit

History

Breadcrumbs

RandomUtils.java

File metadata and controls