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Thread: RGB to Hex

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    Default RGB to Hex

    I am trying to figure out how to get the hexadecimal value from a RGB.

    This is a snippet of my code:

    //where a is the user inputed string of a color, i.e. "red"
    //and where hex is a linkedHashSet used to store the hexadecimal value of the inputed color
     
    final Field f = Color.class.getField(a);
    hex.add(Integer.toHexString((Color)f.get(null) & 0x00ffffff));

    it says that the operater & is undefined for the argument type(s) Color, int

    any insight?
    thanks


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    Default Re: RGB to Hex

    Because you're using the bit operator on a Color object.
    invoke Color.getRGB() first.
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

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    Default Re: RGB to Hex

    how to get the hexadecimal value from a RGB.
    Can you show an example of what you want to do?
    Give a sample input and output

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    Default Re: RGB to Hex

    Literally I want the user to enter a color like red. Since red is a java recognized color I want the program to convert the string into a color and then find the hexadecimal of that color so I can put it into a Jradiobutton to change the background of a gui with it.

    so...
    screen pops up and user enters "red"
    then screen closes and a new screen pops up with a Jradiobutton with the hexadecimal of the entered color
    and when pressed, the screen turns to that color, in this case "red"

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    Default Re: RGB to Hex

    To get from a String value of the name of a color to a String of its RGB value in hex, why not use a hash table with the key the name of the color and the value either an Integer with its RGB value or a Color object from which you can get its RGB value. Use the toHexString method to get the hexString.

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    Default Re: RGB to Hex

    sounds like it might work. how would I implement it?

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    Default Re: RGB to Hex

    You'd write code to load the hashtable.
    Then use the hashtable methods to get the color value using the String the user entered.