Answered: Eclipse java write a program that…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Eclipse java write a program that computes a css color.

Expert Solution

Step 1: algorithm


    // 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";
    }

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