net.slashie.util
Class Util

java.lang.Object
  net.slashie.util.Util

public class Util
extends java.lang.Object

Various utilities to make things easier.

Author:

Santiago Zapata

Constructor Summary

Util()

Method Summary

static int	abs(int a) Returns the absolute value of a number.
static boolean	chance(int p) Tells if a random percent roll is at or below a certain number.
static int	greater(int a, int b) Compares two numbers and returns the larger of them.
static java.util.Vector	page(java.util.Vector source, int elementsOnPage, int pageNumber)
static int	rand(int low, int hi) Used to get a random number within a range, with all numbers being equally likely.
static java.lang.Object	randomElementOf(java.util.ArrayList array)
static int	randomElementOf(int[] array)
static java.lang.Object	randomElementOf(java.lang.Object[] array)
static java.lang.String	randomElementOf(java.lang.String[] array)
static java.lang.Object	randomElementOf(java.util.Vector array)
static int	sign(int n) Gives an indication of the sign (negative or positive) of a specific number.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

rand

public static int rand(int low,
                       int hi)

Used to get a random number within a range, with all numbers being equally likely.

Parameters:

low - low end of range

hi - high end of range

Returns:

randomly chosen number

greater

public static int greater(int a,
                          int b)

Compares two numbers and returns the larger of them. If they are equal, returns the second number.

Parameters:

a -

b -

Returns:

larger number

abs

public static int abs(int a)

Returns the absolute value of a number.

Parameters:

a - number to be used

Returns:

absolute value of a

chance

public static boolean chance(int p)

Tells if a random percent roll is at or below a certain number.

Parameters:

p - number to test

Returns:

true if random roll is less than or equal to p

page

public static java.util.Vector page(java.util.Vector source,
                                    int elementsOnPage,
                                    int pageNumber)

randomElementOf

public static java.lang.String randomElementOf(java.lang.String[] array)

Parameters:

array -

Returns:

a randomly chosen element of array

randomElementOf

public static int randomElementOf(int[] array)

Parameters:

array -

Returns:

a randomly chosen element of array

randomElementOf

public static java.lang.Object randomElementOf(java.util.Vector array)

Parameters:

array -

Returns:

a randomly chosen element of array

randomElementOf

public static java.lang.Object randomElementOf(java.util.ArrayList array)

Parameters:

array -

Returns:

a randomly chosen element of array

randomElementOf

public static java.lang.Object randomElementOf(java.lang.Object[] array)

Parameters:

array -

Returns:

a randomly chosen element of array

sign

public static int sign(int n)

Gives an indication of the sign (negative or positive) of a specific number.

Parameters:

n - number specified

Returns:

1 if positive, -1 if negative, 0 if n==0