org.jfree.chart
Class HashUtilities

java.lang.Object
  org.jfree.chart.HashUtilities

public class HashUtilities
extends java.lang.Object

Some utility methods for calculating hash codes.

Since:

1.0.3

Constructor Summary

HashUtilities()

Method Summary

static int	hashCode(int pre, boolean b) Returns a hash value based on a seed value and the value of a boolean primitive.
static int	hashCode(int pre, org.jfree.util.BooleanList list) Computes a hash code for a BooleanList.
static int	hashCode(int pre, java.lang.Comparable c) Returns a hash value based on a seed value and a Comparable instance.
static int	hashCode(int pre, double d) Returns a hash value based on a seed value and the value of a double primitive.
static int	hashCode(int pre, int i) Returns a hash value based on a seed value and the value of an int primitive.
static int	hashCode(int pre, java.lang.Object obj) Returns a hash value based on a seed value and an Object instance.
static int	hashCode(int pre, java.awt.Paint p) Returns a hash value based on a seed value and a paint instance.
static int	hashCode(int pre, org.jfree.util.PaintList list) Computes a hash code for a PaintList.
static int	hashCode(int pre, java.lang.String s) Returns a hash value based on a seed value and a string instance.
static int	hashCode(int pre, java.awt.Stroke s) Returns a hash value based on a seed value and a stroke instance.
static int	hashCode(int pre, org.jfree.util.StrokeList list) Computes a hash code for a StrokeList.
static int	hashCodeForDoubleArray(double[] a) Returns a hash code for a double[] instance.
static int	hashCodeForPaint(java.awt.Paint p) Returns a hash code for a Paint instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

HashUtilities

public HashUtilities()

Method Detail

hashCodeForPaint

public static int hashCodeForPaint(java.awt.Paint p)

Returns a hash code for a Paint instance. If p is null, this method returns zero.

Parameters:

p - the paint (null permitted).

Returns:

The hash code.

hashCodeForDoubleArray

public static int hashCodeForDoubleArray(double[] a)

Returns a hash code for a double[] instance. If the array is null, this method returns zero.

Parameters:

a - the array (null permitted).

Returns:

The hash code.

hashCode

public static int hashCode(int pre,
                           boolean b)

Returns a hash value based on a seed value and the value of a boolean primitive.

Parameters:

pre - the seed value.

b - the boolean value.

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           int i)

Returns a hash value based on a seed value and the value of an int primitive.

Parameters:

pre - the seed value.

i - the int value.

Returns:

A hash value.

Since:

1.0.8

hashCode

public static int hashCode(int pre,
                           double d)

Returns a hash value based on a seed value and the value of a double primitive.

Parameters:

pre - the seed value.

d - the double value.

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           java.awt.Paint p)

Returns a hash value based on a seed value and a paint instance.

Parameters:

pre - the seed value.

p - the paint (null permitted).

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           java.awt.Stroke s)

Returns a hash value based on a seed value and a stroke instance.

Parameters:

pre - the seed value.

s - the stroke (null permitted).

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           java.lang.String s)

Returns a hash value based on a seed value and a string instance.

Parameters:

pre - the seed value.

s - the string (null permitted).

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           java.lang.Comparable c)

Returns a hash value based on a seed value and a Comparable instance.

Parameters:

pre - the seed value.

c - the comparable (null permitted).

Returns:

A hash value.

Since:

1.0.7

hashCode

public static int hashCode(int pre,
                           java.lang.Object obj)

Returns a hash value based on a seed value and an Object instance.

Parameters:

pre - the seed value.

obj - the object (null permitted).

Returns:

A hash value.

Since:

1.0.8

hashCode

public static int hashCode(int pre,
                           org.jfree.util.BooleanList list)

Computes a hash code for a BooleanList. In the latest version of JCommon, the BooleanList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).

Parameters:

pre - the seed value.

list - the list (null permitted).

Returns:

The hash code.

Since:

1.0.9

hashCode

public static int hashCode(int pre,
                           org.jfree.util.PaintList list)

Computes a hash code for a PaintList. In the latest version of JCommon, the PaintList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).

Parameters:

pre - the seed value.

list - the list (null permitted).

Returns:

The hash code.

Since:

1.0.9

hashCode

public static int hashCode(int pre,
                           org.jfree.util.StrokeList list)

Computes a hash code for a StrokeList. In the latest version of JCommon, the StrokeList class should implement the hashCode() method correctly, but we compute it here anyway so that we can work with older versions of JCommon (back to 1.0.0).

Parameters:

pre - the seed value.

list - the list (null permitted).

Returns:

The hash code.

Since:

1.0.9