Convert an integer to an HTML RGB value : Color « 2D Graphics « Java Tutorial

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2. 2D Graphics
3. Color

/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/

/**
 * Collection of string utilities.
 * 
 */

public class StringUtil
{
  /**
   * Convert an integer to an HTML RGB value. The result is of the form
   * #hhhhhh. The input rgb integer value will be clipped into the range 0 ~
   * 0xFFFFFF
   * 
   * @param rgb
   *            the integer RGB value
   * @return the value as an HTML RGB string
   */

  public static String toRgbText( int rgb )
  {
    // clip input value.

    if ( rgb > 0xFFFFFF )
      rgb = 0xFFFFFF;
    if ( rgb < 0 )
      rgb = 0;

    String str = "000000" + Integer.toHexString( rgb ); //$NON-NLS-1$ 
    return "#" + str.substring( str.length( ) - 6 ); //$NON-NLS-1$ 
  }

}

16.10.Color
	16.10.1.	java.awt.Color
	16.10.2.	Drawing with Color
	16.10.3.	To compare two Color objects you can use the equals() method
	16.10.4.	Color class is used to work with colors in Java 2D
	16.10.5.	Using the getRGB() method for comparing colors
	16.10.6.	Convert RGB to HSB
	16.10.7.	Convert HSB to RGB value
	16.10.8.	Construct Color object
	16.10.9.	Constructs several colors and draws various objects using these colors:
	16.10.10.	Java Predefined Colors
	16.10.11.	Using color with and Bit and
	16.10.12.	Color Factory
	16.10.13.	Convert an integer to an HTML RGB value
	16.10.14.	Converts a given string into a color.
	16.10.15.	HTML color and Java Color
	16.10.16.	Converts the String representation of a color to an actual Color object.
	16.10.17.	Get HTML Color String from Java Color object
	16.10.18.	Derives a color by adding the specified offsets to the base color's hue, saturation, and brightness values
	16.10.19.	Set XOR mode to color blue
	16.10.20.	Map colors into names and vice versa.