正常的 RGB 顏色的有效范圍，是從 0 到 16,777,215 (&HFFFFFF&)。每種顏色的設(shè)置值（屬性或參數(shù)）都是一個四字節(jié)的整數(shù)。對于這個 范圍內(nèi)的數(shù)，其高字節(jié)都是 0，而低三個字節(jié)，從最低字節(jié)到第三個字節(jié)，分別定義了紅、綠、藍(lán)三種顏色的值。紅、綠、藍(lán)三種成分都 是用 0 到 255 (&HFF) 之間的數(shù)表示。因此，可以用十六進(jìn)制數(shù)按照下述語法來指定顏色：

&HBBGGRR&

BB 指定藍(lán)顏色的值，GG 指定綠顏色的值，RR 指定紅顏色的值。每個數(shù)段都是兩位十六進(jìn)制數(shù)，即從 00 到 FF。&H808080&將最高位設(shè)置 為 1，就改變了顏色值的含義：顏色值不再代表一種 RGB 顏色，而是一種從 Windows"控制面板"指定的環(huán)境范圍顏色。這些數(shù)值對應(yīng)的系統(tǒng) 顏色范圍是從 &H80000000 到 &H80000015。 以下就是這些特殊的系統(tǒng)顏色值及其含義：

Constant

Value

Description

vbScrollBars	0x80000000	Scroll bar color
vbDesktop	0x80000001	Desktop color
vbActiveTitleBar	0x80000002	Color of the title bar for the active window
vbInactiveTitleBar	0x80000003	Color of the title bar for the inactive window
vbMenuBar	0x80000004	Menu background color
vbWindowBackground	0x80000005	Window background color
vbWindowFrame	0x80000006	Window frame color
vbMenuText	0x80000007	Color of text on menus
vbWindowText	0x80000008	Color of text in windows
vbTitleBarText	0x80000009	Color of text in caption, size box, and scroll arrow
vbActiveBorder	0x8000000A	Border color of active window
vbInactiveBorder	0x8000000B	Border color of inactive window
vbApplicationWorkspace	0x8000000C	Background color of multiple-document interface (MDI) applications
vbHighlight	0x8000000D	Background color of items selected in a control
vbHighlightText	0x8000000E	Text color of items selected in a control
vbButtonFace	0x8000000F	Color of shading on the face of command buttons
vbButtonShadow	0x80000010	Color of shading on the edge of command buttons
vbGrayText	0x80000011	Grayed (disabled) text
vbButtonText	0x80000012	Text color on push buttons
vbInactiveCaptionText	0x80000013	Color of text in an inactive caption
vb3DHighlight	0x80000014	Highlight color for 3-D display elements
vb3DDKShadow	0x80000015	Darkest shadow color for 3-D display elements
vb3DLight	0x80000016	Second lightest 3-D color after?vb3DHighlight
vbInfoText	0x80000017	Color of text in ToolTips
vbInfoBackground	0x80000018	Background color of ToolTips

首先，Java中的顏色的整數(shù)值是這樣組成的：0~7位是藍(lán)色值, 8~15位是綠色值, 16~23位是紅色值, 24~31位是Alpha值。一個標(biāo)準(zhǔn)的RGB 值轉(zhuǎn)成Java的需要設(shè)置最高8位為FF（默認(rèn)的Alpha值）。此外，對于像VB中這些特殊的系統(tǒng)顏色來說，Java中的SystemColor被用來處理 各個操作系統(tǒng)不同的系統(tǒng)顏色。

public final static SystemColor desktop = new SystemColor((byte)DESKTOP);public final static SystemColor activeCaption = new SystemColor((byte)ACTIVE_CAPTION);public final static SystemColor activeCaptionText = new SystemColor((byte)ACTIVE_CAPTION_TEXT);...private static int[] systemColors;static {updateSystemColors();}/*** Called from <init> & toolkit to update the above systemColors cache.*/private static void updateSystemColors() {if (!GraphicsEnvironment.isHeadless()) {Toolkit.getDefaultToolkit().loadSystemColors(systemColors);}}private SystemColor(byte index) {super(0, 0, 0);value = index;}public int getRGB() {return systemColors[value];} SystemColor通過靜態(tài)域初始化系統(tǒng)顏色的數(shù)組，我們可以利用它的初始化結(jié)果作為當(dāng)前操作系統(tǒng)的系統(tǒng)顏色集合，來完成VB顏色到Java顏色的轉(zhuǎn)換。

package com.cdai.jd;import java.awt.SystemColor; import java.util.HashMap;public class SystemColorTest {public static void main(String[] args) {SystemColorTest tester = new SystemColorTest();// 1.Test for Palette colorSystem.out.println(tester.convertVB2JavaColor(0x80000007) == SystemColor.menuText.getRGB());// 2.Test for System colorSystem.out.println(tester.convertVB2JavaColor(0x004207) == (0xFF | 0x4207));// 3.Test for invalid input argumenttry {System.out.println(tester.convertVB2JavaColor(0x8100000A));} catch (Exception e) {System.out.println("Expect exception here.");}}private static HashMap<Integer, Integer> VB2JavaSystemColorMapping = new HashMap<Integer, Integer>();/*** Color constants refer to:* http://msdn.microsoft.com/en-us/library/office/gg264801.aspx*/static {VB2JavaSystemColorMapping.put(0x80000000, SystemColor.scrollbar.getRGB());VB2JavaSystemColorMapping.put(0x80000001, SystemColor.desktop.getRGB());VB2JavaSystemColorMapping.put(0x80000002, SystemColor.activeCaption.getRGB());VB2JavaSystemColorMapping.put(0x80000003, SystemColor.inactiveCaption.getRGB());VB2JavaSystemColorMapping.put(0x80000004, SystemColor.menu.getRGB());VB2JavaSystemColorMapping.put(0x80000005, SystemColor.window.getRGB());VB2JavaSystemColorMapping.put(0x80000006, SystemColor.scrollbar.getRGB()); //Window frame color?VB2JavaSystemColorMapping.put(0x80000007, SystemColor.menuText.getRGB());VB2JavaSystemColorMapping.put(0x80000008, SystemColor.windowText.getRGB());VB2JavaSystemColorMapping.put(0x80000009, SystemColor.activeCaptionText.getRGB());VB2JavaSystemColorMapping.put(0x8000000A, SystemColor.activeCaptionBorder.getRGB());VB2JavaSystemColorMapping.put(0x8000000B, SystemColor.inactiveCaptionBorder.getRGB());VB2JavaSystemColorMapping.put(0x8000000C, SystemColor.scrollbar.getRGB()); //Background color of multiple-document interface (MDI) applications?VB2JavaSystemColorMapping.put(0x8000000D, SystemColor.textHighlight.getRGB());VB2JavaSystemColorMapping.put(0x8000000E, SystemColor.textHighlightText.getRGB());VB2JavaSystemColorMapping.put(0x8000000F, SystemColor.scrollbar.getRGB()); //Color of shading on the face of command buttons?VB2JavaSystemColorMapping.put(0x80000010, SystemColor.scrollbar.getRGB()); //Color of shading on the edge of command buttons?VB2JavaSystemColorMapping.put(0x80000011, SystemColor.textInactiveText.getRGB());VB2JavaSystemColorMapping.put(0x80000012, SystemColor.controlText.getRGB());VB2JavaSystemColorMapping.put(0x80000013, SystemColor.inactiveCaptionText.getRGB());VB2JavaSystemColorMapping.put(0x80000014, SystemColor.controlHighlight.getRGB());VB2JavaSystemColorMapping.put(0x80000015, SystemColor.controlDkShadow.getRGB());VB2JavaSystemColorMapping.put(0x80000016, SystemColor.controlLtHighlight.getRGB());VB2JavaSystemColorMapping.put(0x80000017, SystemColor.infoText.getRGB());VB2JavaSystemColorMapping.put(0x80000018, SystemColor.info.getRGB());}/*** Convert color hex value in VB to Java color hex.* * @param vbColorHex 0x80000000 - 0x80000018 for VB system color, * 0x00AB1234 for palette color* * @return Bits 24-31 are alpha (FF as default), * 16-23 are red, * 8-15 are green, * 0-7 are blue*/public int convertVB2JavaColor(int vbColorHex) {int javaColorHex;int highByte = (vbColorHex >>> 24);if (highByte == 0) { // Palette color if high byte is 0.javaColorHex = 0xFF | vbColorHex;}else if (highByte == 128) { // System color if highest bit is 1javaColorHex = VB2JavaSystemColorMapping.get(vbColorHex);}else { throw new IllegalArgumentException("Illegal hex color argument: " + vbColorHex);}return javaColorHex;}}
簡單跑了下，不知道是否正確，有沒有人有寫這方面代碼的經(jīng)驗(yàn)？

轉(zhuǎn)載于:https://www.cnblogs.com/xiaomaohai/archive/2012/10/14/6157800.html

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