How to convert hex to rgb using Java

Question

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

User · Answer

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            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

User · Answer

For Android development  I use   int color   Color parseColor   123456

User · Answer

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  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

User · Answer

The easiest way      0000FF public static Color hex2Rgb String colorStr        return new Color Integer valueOf colorStr  16

User · Answer

Here is another faster version that handles RGBA versions   public static int hexToIntColor String hex       int Alpha   Integer valueOf hex substring 0  2   16       int Red   Integer valueOf hex substring 2  4   16       int Green   Integer valueOf hex substring 4  6   16       int Blue   Integer valueOf hex substring 6  8   16       Alpha    Alpha  lt  lt  24   amp  0xFF000000      Red    Red  lt  lt  16   amp  0x00FF0000      Green    Green  lt  lt  8   amp  0x0000FF00      Blue   Blue  amp  0x000000FF      return Alpha   Red   Green   Blue

User · Answer

Hexidecimal color codes are already rgb  The format is  RRGGBB

User · Answer

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             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

User · Answer

you can do it simply as below    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      For Example  getRGB  444444     68 68 68    getRGB  FFFFFF     255 255 255

User · Answer

I guess this should do it               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

User · Answer

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       I think that this wil work

User · Answer

For JavaFX  import javafx scene paint Color       Color whiteColor   Color valueOf   ffffff

User · Answer

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

User · Answer

If you don t want to use the AWT Color decode  then just copy the contents of the method   int i   Integer decode   FFFFFF    int   rgb   new int    i  gt  gt  16   amp  0xFF   i  gt  gt  8   amp  0xFF  i  amp  0xFF     Integer decode handles the   or 0x  depending on how your string is formatted

User · Answer

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

User · Answer

Here is a version that handles both RGB and RGBA versions          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

User · Answer

Lots of these solutions work  but this is an alternative   String hex   00FF00      green long thisCol Long decode hex  4278190080L  int useColour  int thisCol    If you don t add 4278190080   FF000000  the colour has an Alpha of 0 and won t show

User · Answer

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

User · Answer

For Android Kotlin users   quot  FFF quot  longARGB    let  Color parceColor it     quot  FFFF quot  longARGB    let  Color parceColor it     fun String  longARGB    String        if  this    null     startsWith  quot   quot    return null             RRGGBB or  AARRGGBB     if  length    7    length    9  return this         RGB or  ARGB     if  length in 4  5            val rgb    quot    this 1    this 1    this 2    this 2    this 3    this 3   quot          if  length    5                return  quot  rgb  this 4    this 4   quot                    return rgb            return null

User · Answer

Actually  there s an easier  built in  way of doing this    Color decode   FFCCEE

[java] How to convert hex to rgb using Java?

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