In this tutorial, we will introduce how to convert a rgb color value to hex code using java.

We can create a java function to implement.

// Java code to convert the given RGB 
// color code to Hex color code 
   
  
import java.util.*; 
  
class ColorTest{ 
   
// function to convert decimal to hexadecimal 
static String decToHexa(int n) 
{ 
    // char array to store hexadecimal number 
    char []hexaDeciNum = new char[2]; 
   
    // counter for hexadecimal number array 
    int i = 0; 
    while (n != 0) { 
   
        // temporary variable to store remainder 
        int temp = 0; 
   
        // storing remainder in temp variable. 
        temp = n % 16; 
   
        // check if temp < 10 
        if (temp < 10) { 
            hexaDeciNum[i] = (char) (temp + 48); 
            i++; 
        } 
        else { 
            hexaDeciNum[i] = (char) (temp + 55); 
            i++; 
        } 
   
        n = n / 16; 
    } 
   
    String hexCode = ""; 
    if (i == 2) { 
        hexCode+=hexaDeciNum[0]; 
        hexCode+=hexaDeciNum[1]; 
    } 
    else if (i == 1) { 
        hexCode = "0"; 
        hexCode+=hexaDeciNum[0]; 
    } 
    else if (i == 0) 
        hexCode = "00"; 
   
    // Return the equivalent 
    // hexadecimal color code 
    return hexCode; 
} 
   
// Function to convert the 
// RGB code to Hex color code 
static String convertRGBtoHex(int R, int G, int B) 
{ 
    if ((R >= 0 && R <= 255) 
        && (G >= 0 && G <= 255) 
        && (B >= 0 && B <= 255)) { 
   
        String hexCode = "#"; 
        hexCode += decToHexa(R); 
        hexCode += decToHexa(G); 
        hexCode += decToHexa(B); 
   
        return hexCode; 
    } 
   
    // The hex color code doesn't exist 
    else
        return "-1"; 
} 
   
// Driver program to test above function 
public static void main(String[] args) 
{ 
    int R = 64, G = 64, B = 64; 
    System.out.print(convertRGBtoHex(R, G, B) +"\n"); 
   
} 
}

Then you can use convertRGBtoHex(r, g, b) to convert.

Run this java code, you will get: #444444