Package org.openjdk.jmc.common.util

Class ColorToolkit

java.lang.Object

org.openjdk.jmc.common.util.ColorToolkit

public class ColorToolkit
extends Object

Toolkit for working with AWT colors.

Method Summary

Modifier and Type	Method	Description
static Color	blend(Color fg, Color bg)
static Color	decode(String hexColor)	Decode a string created by encode(Color) and create a corresponding color instance.
static String	encode(Color color)	Encode a color as a hexadecimal string starting with '#'.
static Color	getDistinguishableColor(Object o)	Generate a color based on an object.
static GradientPaint	getGradientPaint(Color topColor, int top)	Get a gradient paint based on a top color.
static Color	withAlpha(Color color, int alpha)	Create a color with a specified alpha value.

Methods inherited from class java.lang.Object

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

Method Detail

encode

public static String encode(Color color)

Encode a color as a hexadecimal string starting with '#'. This string can be decoded using decode(String).

Parameters:

color - color to encode

Returns:

a hexadecimal string representing the color

decode

public static Color decode(String hexColor)
                    throws NumberFormatException

Decode a string created by encode(Color) and create a corresponding color instance.

Parameters:

hexColor - hexadecimal string to decode

Returns:

a color instance

Throws:

NumberFormatException - if the string can't be decoded

getDistinguishableColor

public static Color getDistinguishableColor(Object o)

Generate a color based on an object. The goal is to be able to run this on a number of different objects and get colors that are distinguishable from each other.

The algorithm for generating colors is arbitrary and may be changed.

Parameters:

o - object to get a color for

Returns:

a color instance

getGradientPaint

public static GradientPaint getGradientPaint(Color topColor,
                                             int top)

Get a gradient paint based on a top color. The bottom color will be generated based on the top color.

Parameters:

topColor - color for the top of the gradient

top - X coordinate for the top color

Returns:

a gradient with a generated bottom color at X=0 and the top color at X=top

withAlpha

public static Color withAlpha(Color color,
                              int alpha)

Create a color with a specified alpha value.

Parameters:

color - base color

alpha - alpha value

Returns:

a color based on the base color and with the specified alpha value

blend

public static Color blend(Color fg,
                          Color bg)