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src/main/java/com/thealgorithms/conversions/DecimalToHexadecimal.java
42 строки
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Alex Klymenko
refactor: `DecimalToHexadecimal` (#5337)
17 авг 2024, 21:58
Не верифицирован
17 авг 2024, 21:58
25b6aeb
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package com.thealgorithms.conversions; /** * This class provides a method to convert a decimal number to a hexadecimal string. */ final class DecimalToHexadecimal { private static final int SIZE_OF_INT_IN_HALF_BYTES = 8; private static final int NUMBER_OF_BITS_IN_HALF_BYTE = 4; private static final int HALF_BYTE_MASK = 0x0F; private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; private DecimalToHexadecimal() { } /** * Converts a decimal number to a hexadecimal string. * @param decimal the decimal number to convert * @return the hexadecimal representation of the decimal number */ public static String decToHex(int decimal) { StringBuilder hexBuilder = new StringBuilder(SIZE_OF_INT_IN_HALF_BYTES); for (int i = SIZE_OF_INT_IN_HALF_BYTES - 1; i >= 0; --i) { int currentHalfByte = decimal & HALF_BYTE_MASK; hexBuilder.insert(0, HEX_DIGITS[currentHalfByte]); decimal >>= NUMBER_OF_BITS_IN_HALF_BYTE; } return removeLeadingZeros(hexBuilder.toString().toLowerCase()); } private static String removeLeadingZeros(String str) { if (str == null || str.isEmpty()) { return str; } int i = 0; while (i < str.length() && str.charAt(i) == '0') { i++; } return i == str.length() ? "0" : str.substring(i); } }