DecimalToHexadecimal.java

packagecom.thealgorithms.conversions;

/**
 * This class provides a method to convert a decimal number to a hexadecimal string.
 */
finalclassDecimalToHexadecimal {
privatestaticfinalintSIZE_OF_INT_IN_HALF_BYTES = 8;
privatestaticfinalintNUMBER_OF_BITS_IN_HALF_BYTE = 4;
privatestaticfinalintHALF_BYTE_MASK = 0x0F;
privatestaticfinalchar[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

privateDecimalToHexadecimal() {
 }

/**
 * Converts a decimal number to a hexadecimal string.
 * @param decimal the decimal number to convert
 * @return the hexadecimal representation of the decimal number
 */
publicstaticStringdecToHex(intdecimal) {
StringBuilderhexBuilder = newStringBuilder(SIZE_OF_INT_IN_HALF_BYTES);
for (inti = SIZE_OF_INT_IN_HALF_BYTES - 1; i >= 0; --i) {
intcurrentHalfByte = decimal & HALF_BYTE_MASK;
hexBuilder.insert(0, HEX_DIGITS[currentHalfByte]);
decimal >>= NUMBER_OF_BITS_IN_HALF_BYTE;
 }
returnremoveLeadingZeros(hexBuilder.toString().toLowerCase());
 }

privatestaticStringremoveLeadingZeros(Stringstr) {
if (str == null || str.isEmpty()) {
returnstr;
 }

inti = 0;
while (i < str.length() && str.charAt(i) == '0') {
i++;
 }

returni == str.length() ? "0" : str.substring(i);
 }
}