How to convert RGBA to hex in Java?

@eloy.johnston 

In Java, you can use the Integer.toHexString() method to convert an RGBA color to a hexadecimal value. Here's an example of how you can do this:

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int r = 255;
int g = 99;
int b = 71;
int a = 128;

String hex = "#" + Integer.toHexString(r) + Integer.toHexString(g) + Integer.toHexString(b) + Integer.toHexString(a);
System.out.println(hex);

This will output the hexadecimal value #ff634780. Note that the alpha channel value(a) is not included in the RGB hex value. You can also use String.format("#%02x%02x%02x", r, g, b) to get the RGB hex value without alpha channel.

@eloy.johnston 

Here's a complete Java code snippet to convert an RGBA color to a hex value considering all the components (Red, Green, Blue, and Alpha):

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public class RGBAToHexConverter {
    
    public static void main(String[] args) {
        int r = 255;
        int g = 99;
        int b = 71;
        int a = 128;
        
        String hex = String.format("#%02X%02X%02X%02X", r, g, b, a);
        System.out.println(hex);
    }
}

This code snippet will output the full RGBA hexadecimal value of the color (#FF634780), where FF represents the Red, 63 represents the Green, 47 represents the Blue, and 80 represents the Alpha value.

You can run this code in a Java environment to convert any RGBA color to its corresponding hexadecimal value.