blocks|key|882209|text|我想这应该可以做到：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882210|/**
+*+
+*+@param+colorStr+e.g.+"#FFFFFF"
+*+@return+
+*/
public+static+Color+hex2Rgb(String+colorStr)+{
++++return+new+Color(
++++++++++++Integer.valueOf(+colorStr.substring(+1,+3+),+16+),
++++++++++++Integer.valueOf(+colorStr.substring(+3,+5+),+16+),
++++++++++++Integer.valueOf(+colorStr.substring(+5,+7+),+16+)+);
}|code-block|syntax|javascript|882211|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I guess this should do it:

<pre><code>/**
 * 
 * @param colorStr e.g. "#FFFFFF"
 * @return 
 */
public static Color hex2Rgb(String colorStr) {
 return new Color(
 Integer.valueOf( colorStr.substring( 1, 3 ), 16 ),
 Integer.valueOf( colorStr.substring( 3, 5 ), 16 ),
 Integer.valueOf( colorStr.substring( 5, 7 ), 16 ) );
}
</code></pre>

blocks|key|882270|text|实际上，有一种更简单的(内置的)方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882271|Color.decode("#FFCCEE");|code-block|syntax|javascript|882272|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Actually, there's an easier (built in) way of doing this: 

<pre><code>Color.decode("#FFCCEE");
</code></pre>

blocks|key|1097113|text|public+static+void+main(String[]+args)+{
++++int+hex+=+0x123456;
++++int+r+=+(hex+&+0xFF0000)+>>+16;
++++int+g+=+(hex+&+0xFF00)+>>+8;
++++int+b+=+(hex+&+0xFF);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1097114|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public static void main(String[] args) {
 int hex = 0x123456;
 int r = (hex &amp; 0xFF0000) &gt;&gt; 16;
 int g = (hex &amp; 0xFF00) &gt;&gt; 8;
 int b = (hex &amp; 0xFF);
}
</code></pre>

blocks|key|882421|text|这是一个同时处理RGB和RGBA版本的版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882422|/**
+*+Converts+a+hex+string+to+a+color.+If+it+can't+be+converted+null+is+returned.
+*+@param+hex+(i.e.+#CCCCCCFF+or+CCCCCC)
+*+@return+Color
+*/
public+static+Color+HexToColor(String+hex)+
{
++++hex+=+hex.replace("#",+"");
++++switch+(hex.length())+{
++++++++case+6:
++++++++++++return+new+Color(
++++++++++++Integer.valueOf(hex.substring(0,+2),+16),
++++++++++++Integer.valueOf(hex.substring(2,+4),+16),
++++++++++++Integer.valueOf(hex.substring(4,+6),+16));
++++++++case+8:
++++++++++++return+new+Color(
++++++++++++Integer.valueOf(hex.substring(0,+2),+16),
++++++++++++Integer.valueOf(hex.substring(2,+4),+16),
++++++++++++Integer.valueOf(hex.substring(4,+6),+16),
++++++++++++Integer.valueOf(hex.substring(6,+8),+16));
++++}
++++return+null;
}|code-block|syntax|javascript|882423|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is a version that handles both RGB and RGBA versions:

<pre><code>/**
 * Converts a hex string to a color. If it can't be converted null is returned.
 * @param hex (i.e. #CCCCCCFF or CCCCCC)
 * @return Color
 */
public static Color HexToColor(String hex) 
{
 hex = hex.replace("#", "");
 switch (hex.length()) {
 case 6:
 return new Color(
 Integer.valueOf(hex.substring(0, 2), 16),
 Integer.valueOf(hex.substring(2, 4), 16),
 Integer.valueOf(hex.substring(4, 6), 16));
 case 8:
 return new Color(
 Integer.valueOf(hex.substring(0, 2), 16),
 Integer.valueOf(hex.substring(2, 4), 16),
 Integer.valueOf(hex.substring(4, 6), 16),
 Integer.valueOf(hex.substring(6, 8), 16));
 }
 return null;
}
</code></pre>

blocks|key|882315|text|您可以简单地执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882316|+public+static+int[]+getRGB(final+String+rgb)
{
++++final+int[]+ret+=+new+int[3];
++++for+(int+i+=+0;+i+<+3;+i%2B%2B)
++++{
++++++++ret[i]+=+Integer.parseInt(rgb.substring(i+*+2,+i+*+2+%2B+2),+16);
++++}
++++return+ret;
}|code-block|syntax|javascript|882317|例如|882318|getRGB("444444")+=+68,68,68+++
getRGB("FFFFFF")+=+255,255,255|882319|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

you can do it simply as below:

<pre><code> public static int[] getRGB(final String rgb)
{
 final int[] ret = new int[3];
 for (int i = 0; i &lt; 3; i++)
 {
 ret[i] = Integer.parseInt(rgb.substring(i * 2, i * 2 + 2), 16);
 }
 return ret;
}
</code></pre>

For Example

<pre><code>getRGB("444444") = 68,68,68 
getRGB("FFFFFF") = 255,255,255
</code></pre>

blocks|key|882237|text|十六进制颜色代码是#RRGGBB|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882238|RR、GG、BB是从0到255的十六进制值|882239|让我们调用RR+XY，其中X和Y是十六进制字符0-9A-F，A=10，F=15|882240|十进制值为X*16%2BY|882241|如果RR+=+B7，则B的小数为11，因此值为11*16+%2B7=+183|882242|public+int[]+getRGB(String+rgb){
++++int[]+ret+=+new+int[3];
++++for(int+i=0;+i<3;+i%2B%2B){
++++++++ret[i]+=+hexToInt(rgb.charAt(i*2),+rgb.charAt(i*2%2B1));
++++}
++++return+ret;
}

public+int+hexToInt(char+a,+char+b){
++++int+x+=+a+<+65+?+a-48+:+a-55;
++++int+y+=+b+<+65+?+b-48+:+b-55;
++++return+x*16%2By;
}|code-block|syntax|javascript|882243|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|V|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

A hex color code is #RRGGBB

RR, GG, BB are hex values ranging from 0-255

Let's call RR XY where X and Y are hex character 0-9A-F, A=10, F=15

The decimal value is X*16+Y

If RR = B7, the decimal for B is 11, so value is 11*16 + 7 = 183

<pre><code>public int[] getRGB(String rgb){
 int[] ret = new int[3];
 for(int i=0; i&lt;3; i++){
 ret[i] = hexToInt(rgb.charAt(i*2), rgb.charAt(i*2+1));
 }
 return ret;
}

public int hexToInt(char a, char b){
 int x = a &lt; 65 ? a-48 : a-55;
 int y = b &lt; 65 ? b-48 : b-55;
 return x*16+y;
}
</code></pre>

blocks|key|882158|text|将其转换为整数，然后根据原始十六进制字符串的长度(分别为3、6、9或12+)将其除以16、256、4096或65536两次。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882159|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Convert it to an integer, then divmod it twice by 16, 256, 4096, or 65536 depending on the length of the original hex string (3, 6, 9, or 12 respectively).

blocks|key|882336|text|许多这样的解决方案都是有效的，但这是一种替代方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882337|String+hex="#00FF00";+//+green
long+thisCol=Long.decode(hex)%2B4278190080L;
int+useColour=(int)thisCol;|code-block|syntax|javascript|882338|如果不添加4278190080+(#FF000000)，颜色的Alpha值为0，将不会显示。|882339|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Lots of these solutions work, but this is an alternative.

<pre><code>String hex="#00FF00"; // green
long thisCol=Long.decode(hex)+4278190080L;
int useColour=(int)thisCol;
</code></pre>

If you don't add 4278190080 (#FF000000) the colour has an Alpha of 0 and won't show.

blocks|key|882286|text|要详细说明所提供的答案@xhh，您可以在返回字符串之前附加红色、绿色和蓝色，以将字符串格式化为"rgb(0,0,0)“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882287|/**
*+
*+@param+colorStr+e.g.+"#FFFFFF"
*+@return+String+-+formatted+"rgb(0,0,0)"
*/
public+static+String+hex2Rgb(String+colorStr)+{
++++Color+c+=+new+Color(
++++++++Integer.valueOf(hexString.substring(1,+3),+16),+
++++++++Integer.valueOf(hexString.substring(3,+5),+16),+
++++++++Integer.valueOf(hexString.substring(5,+7),+16));

++++StringBuffer+sb+=+new+StringBuffer();
++++sb.append("rgb(");
++++sb.append(c.getRed());
++++sb.append(",");
++++sb.append(c.getGreen());
++++sb.append(",");
++++sb.append(c.getBlue());
++++sb.append(")");
++++return+sb.toString();
}|code-block|syntax|javascript|882288|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To elaborate on the answer @xhh provided, you can append the red, green, and blue to format your string as "rgb(0,0,0)" before returning it.

<pre><code>/**
* 
* @param colorStr e.g. "#FFFFFF"
* @return String - formatted "rgb(0,0,0)"
*/
public static String hex2Rgb(String colorStr) {
 Color c = new Color(
 Integer.valueOf(hexString.substring(1, 3), 16), 
 Integer.valueOf(hexString.substring(3, 5), 16), 
 Integer.valueOf(hexString.substring(5, 7), 16));

 StringBuffer sb = new StringBuffer();
 sb.append("rgb(");
 sb.append(c.getRed());
 sb.append(",");
 sb.append(c.getGreen());
 sb.append(",");
 sb.append(c.getBlue());
 sb.append(")");
 return sb.toString();
}
</code></pre>

blocks|key|882487|text|如果您不想使用AWT+Color.decode，那么只需复制该方法的内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882488|int+i+=+Integer.decode("#FFFFFF");
int[]+rgb+=+new+int[]{(i+>>+16)+&+0xFF,+(i+>>+8)+&+0xFF,+i+&+0xFF};|code-block|syntax|javascript|882489|Integer.decode处理#或0x，具体取决于字符串的格式|882490|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you don't want to use the AWT Color.decode, then just copy the contents of the method:

<pre><code>int i = Integer.decode("#FFFFFF");
int[] rgb = new int[]{(i &gt;&gt; 16) &amp; 0xFF, (i &gt;&gt; 8) &amp; 0xFF, i &amp; 0xFF};
</code></pre>

Integer.decode handles the # or 0x, depending on how your string is formatted

blocks|key|1097366|text|最简单的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1097367|//+0000FF
public+static+Color+hex2Rgb(String+colorStr)+{
++++return+new+Color(Integer.valueOf(colorStr,+16));
}|code-block|syntax|javascript|1097368|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The easiest way:

<pre><code>// 0000FF
public static Color hex2Rgb(String colorStr) {
 return new Color(Integer.valueOf(colorStr, 16));
}
</code></pre>

blocks|key|882525|text|public+static+Color+hex2Rgb(String+colorStr)+{
++++try+{
++++++++//+Create+the+color
++++++++return+new+Color(
++++++++++++++++//+Using+Integer.parseInt()+with+a+radix+of+16
++++++++++++++++//+on+string+elements+of+2+characters.+Example:+"FF+05+E5"
++++++++++++++++Integer.parseInt(colorStr.substring(0,+2),+16),
++++++++++++++++Integer.parseInt(colorStr.substring(2,+4),+16),
++++++++++++++++Integer.parseInt(colorStr.substring(4,+6),+16));
++++}+catch+(StringIndexOutOfBoundsException+e){
++++++++//+If+a+string+with+a+length+smaller+than+6+is+inputted
++++++++return+new+Color(0,0,0);
++++}
}

public+static+String+rgbToHex(Color+color)+{
++++//++++++Integer.toHexString(),+built+in+Java+method++++++++Use+this+to+add+a+second+0+if+the
++++//+++++.Get+the+different+RGB+values+and+convert+them.+++++output+will+only+be+one+character.
++++return+Integer.toHexString(color.getRed()).toUpperCase()+%2B+(color.getRed()+<+16+?+0+:+"")+%2B+//+Add+String
++++++++++++Integer.toHexString(color.getGreen()).toUpperCase()+%2B+(color.getGreen()+<+16+?+0+:+"")+%2B
++++++++++++Integer.toHexString(color.getBlue()).toUpperCase()+%2B+(color.getBlue()+<+16+?+0+:+"");
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|882526|我想这会起作用的。|unstyled|882527|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre class="lang-java prettyprint-override"><code>public static Color hex2Rgb(String colorStr) {
 try {
 // Create the color
 return new Color(
 // Using Integer.parseInt() with a radix of 16
 // on string elements of 2 characters. Example: &quot;FF 05 E5&quot;
 Integer.parseInt(colorStr.substring(0, 2), 16),
 Integer.parseInt(colorStr.substring(2, 4), 16),
 Integer.parseInt(colorStr.substring(4, 6), 16));
 } catch (StringIndexOutOfBoundsException e){
 // If a string with a length smaller than 6 is inputted
 return new Color(0,0,0);
 }
}

public static String rgbToHex(Color color) {
 // Integer.toHexString(), built in Java method Use this to add a second 0 if the
 // .Get the different RGB values and convert them. output will only be one character.
 return Integer.toHexString(color.getRed()).toUpperCase() + (color.getRed() &lt; 16 ? 0 : &quot;&quot;) + // Add String
 Integer.toHexString(color.getGreen()).toUpperCase() + (color.getGreen() &lt; 16 ? 0 : &quot;&quot;) +
 Integer.toHexString(color.getBlue()).toUpperCase() + (color.getBlue() &lt; 16 ? 0 : &quot;&quot;);
}
</code></pre>
I think that this wil work.

blocks|key|1097425|text|十六进制是以16为基数，因此您可以使用基数为16的parseLong来解析该字符串：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1097426|Color+newColor+=+new+Color((int)+Long.parseLong("FF7F0055",+16));|code-block|syntax|javascript|1097427|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Hex is base 16, so you can parse the string with parseLong using a radix of 16 :
<pre><code>Color newColor = new Color((int) Long.parseLong(&quot;FF7F0055&quot;, 16));
</code></pre>

blocks|key|1097079|text|十六进制颜色代码已经是rgb了。格式为#RRGGBB|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1097080|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Hexidecimal color codes are already rgb. The format is #RRGGBB

blocks|key|882378|text|前几天，我一直在解决类似的问题，发现将十六进制颜色字符串转换为整数数组alpha，r，g，b很方便|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882379|+/**
+*+Hex+color+string+to+int[]+array+converter
+*
+*+@param+hexARGB+should+be+color+hex+string:+#AARRGGBB+or+#RRGGBB
+*+@return+int[]+array:+[alpha,+r,+g,+b]
+*+@throws+IllegalArgumentException
+*/

public+static+int[]+hexStringToARGB(String+hexARGB)+throws+IllegalArgumentException+{

++++if+(!hexARGB.startsWith("#")+%7C%7C+!(hexARGB.length()+==+7+%7C%7C+hexARGB.length()+==+9))+{

++++++++throw+new+IllegalArgumentException("Hex+color+string+is+incorrect!");
++++}

++++int[]+intARGB+=+new+int[4];

++++if+(hexARGB.length()+==+9)+{
++++++++intARGB[0]+=+Integer.valueOf(hexARGB.substring(1,+3),+16);+//+alpha
++++++++intARGB[1]+=+Integer.valueOf(hexARGB.substring(3,+5),+16);+//+red
++++++++intARGB[2]+=+Integer.valueOf(hexARGB.substring(5,+7),+16);+//+green
++++++++intARGB[3]+=+Integer.valueOf(hexARGB.substring(7),+16);+//+blue
++++}+else+hexStringToARGB("#FF"+%2B+hexARGB.substring(1));

++++return+intARGB;
}|code-block|syntax|javascript|882380|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The other day I'd been solving the similar issue and found convenient to convert hex color string to int array [alpha, r, g, b]:

<pre><code> /**
 * Hex color string to int[] array converter
 *
 * @param hexARGB should be color hex string: #AARRGGBB or #RRGGBB
 * @return int[] array: [alpha, r, g, b]
 * @throws IllegalArgumentException
 */

public static int[] hexStringToARGB(String hexARGB) throws IllegalArgumentException {

 if (!hexARGB.startsWith("#") || !(hexARGB.length() == 7 || hexARGB.length() == 9)) {

 throw new IllegalArgumentException("Hex color string is incorrect!");
 }

 int[] intARGB = new int[4];

 if (hexARGB.length() == 9) {
 intARGB[0] = Integer.valueOf(hexARGB.substring(1, 3), 16); // alpha
 intARGB[1] = Integer.valueOf(hexARGB.substring(3, 5), 16); // red
 intARGB[2] = Integer.valueOf(hexARGB.substring(5, 7), 16); // green
 intARGB[3] = Integer.valueOf(hexARGB.substring(7), 16); // blue
 } else hexStringToARGB("#FF" + hexARGB.substring(1));

 return intARGB;
}
</code></pre>

blocks|key|882492|text|For+shortened+hex+code+like+#fff+or+#000

int+red+=+"colorString".charAt(1)+==+'0'+?+0+:+
+++++"colorString".charAt(1)+==+'f'+?+255+:+228;++
int+green+=
+++++"colorString".charAt(2)+==+'0'+?+0+:++"colorString".charAt(2)+==+'f'+?
+++++255+:+228;++
int+blue+=+"colorString".charAt(3)+==+'0'+?+0+:+
+++++"colorString".charAt(3)+==+'f'+?+255+:+228;

Color.rgb(red,+green,blue);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|882493|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>For shortened hex code like #fff or #000

int red = "colorString".charAt(1) == '0' ? 0 : 
 "colorString".charAt(1) == 'f' ? 255 : 228; 
int green =
 "colorString".charAt(2) == '0' ? 0 : "colorString".charAt(2) == 'f' ?
 255 : 228; 
int blue = "colorString".charAt(3) == '0' ? 0 : 
 "colorString".charAt(3) == 'f' ? 255 : 228;

Color.rgb(red, green,blue);
</code></pre>

How can I convert hex color to RGB code in Java? Mostly in Google, samples are on how to convert from RGB to hex.

How to convert hex to rgb using Java?

Java

如何在Java中将十六进制颜色转换为RGB代码？大多数在Google中，示例都是关于如何从RGB转换为十六进制的。

问如何使用Java将十六进制转换为rgb？
EN

回答 16

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问如何使用Java将十六进制转换为rgb？EN

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问如何使用Java将十六进制转换为rgb？
EN