de.alpharogroup.math

Class MathExtensions

java.lang.Object

de.alpharogroup.math.MathExtensions

public class MathExtensions
extends Object

Utility class for the use numbers.

Version:

1.0

Author:

Asterios Raptis

Constructor Summary

Constructors

Constructor and Description
MathExtensions()

Method Summary

Modifier and Type	Method and Description
static int[]	getPrimeNumbers(int quantity) Gets the prime numbers for the given quantity.
static boolean	isBetween(int min, int max, int index) Checks the given index is between the range from min and max.
static boolean	isInRange(int min, int max, int number) Checks the given number is in range from min and max.
static boolean	isNegative(double number) Checks if the number is negative.
static boolean	isNegative(int number) Checks if the number is negative.
static boolean	isNegative(long number) Checks if the number is negative.
static boolean	isNext(Integer number, Integer nextNumber) Checks if the given Integer nextNumber is next to the given Integer number.
static boolean	isPositive(double number) Checks if the number is positive.
static boolean	isPositive(int number) Checks if the number is positive.
static boolean	isPositive(long number) Checks if the number is positive.
static boolean	isPrevious(Integer number, Integer previousNumber) Checks if the given Integer previousNumber is previous to the given Integer number.
static boolean	isPrimeNumber(int number) Checks if the number is a prime number.
static int[]	printAllPrimeNumbersTill(int noOfPrimes) Prints all prime numbers till the given number.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MathExtensions

public MathExtensions()

Method Detail

getPrimeNumbers

public static int[] getPrimeNumbers(int quantity)

Gets the prime numbers for the given quantity.

Parameters:

quantity - The quantity.

Returns:

An array from prime numbers.

isBetween

public static boolean isBetween(int min,
                                int max,
                                int index)

Checks the given index is between the range from min and max.

Parameters:

min - The minimum.

max - The maximum.

index - The index.

Returns:

Returns true if the index is betwenn the range from min and max otherwise false.

isInRange

public static boolean isInRange(int min,
                                int max,
                                int number)

Checks the given number is in range from min and max.

Parameters:

min - The minimum.

max - The maximum.

number - The index.

Returns:

Returns true if the number is in range from min and max otherwise false.

isNegative

public static boolean isNegative(double number)

Checks if the number is negative.

Parameters:

number - The number.

Returns:

Returns true if the number is negative otherwise false.

isNegative

public static boolean isNegative(int number)

Checks if the number is negative.

Parameters:

number - The number.

Returns:

Returns true if the number is negative otherwise false.

isNegative

public static boolean isNegative(long number)

Checks if the number is negative.

Parameters:

number - The number.

Returns:

Returns true if the number is negative otherwise false.

isNext

public static boolean isNext(Integer number,
                             Integer nextNumber)

Checks if the given Integer nextNumber is next to the given Integer number.
Example:
isNext(1, 2); => true;
isNext(1, 3); => false;
isNext(4, 3); => false;

Parameters:

number - the number

nextNumber - the next number

Returns:

true, if the given Integer nextNumber is next to the given Integer number otherwise false.

isPositive

public static boolean isPositive(double number)

Checks if the number is positive.

Parameters:

number - The number.

Returns:

Returns true if the number is positive otherwise false.

isPositive

public static boolean isPositive(int number)

Checks if the number is positive.

Parameters:

number - The number.

Returns:

Returns true if the number is positive otherwise false.

isPositive

public static boolean isPositive(long number)

Checks if the number is positive.

Parameters:

number - The number.

Returns:

Returns true if the number is positive otherwise false.

isPrevious

public static boolean isPrevious(Integer number,
                                 Integer previousNumber)

Checks if the given Integer previousNumber is previous to the given Integer number.
Example:
isPrevious(1, 2); => false;
isPrevious(1, 3); => false;
isPrevious(4, 3); => true;

Parameters:

number - the number

previousNumber - the previous number

Returns:

true, if the given Integer previousNumber is previous to the given Integer number otherwise false.

isPrimeNumber

public static boolean isPrimeNumber(int number)

Checks if the number is a prime number.

Parameters:

number - The number.

Returns:

Returns true if the number is a prime number otherwise false.

printAllPrimeNumbersTill

public static int[] printAllPrimeNumbersTill(int noOfPrimes)

Prints all prime numbers till the given number.

Parameters:

noOfPrimes - The limit.

Returns:

an array of all prime numbers till the given number.