DecimalToBinary.java

package com.thealgorithms.conversions;

/**
 * This class provides methods to convert a decimal number to a binary number.
 */
final class DecimalToBinary {
 private static final int BINARY_BASE = 2;
 private static final int DECIMAL_MULTIPLIER = 10;

 private DecimalToBinary() {
 }

 /**
 * Converts a decimal number to a binary number using a conventional algorithm.
 * @param decimalNumber the decimal number to convert
 * @return the binary representation of the decimal number
 */
 public static int convertUsingConventionalAlgorithm(int decimalNumber) {
 int binaryNumber = 0;
 int position = 1;

 while (decimalNumber > 0) {
 int remainder = decimalNumber % BINARY_BASE;
 binaryNumber += remainder * position;
 position *= DECIMAL_MULTIPLIER;
 decimalNumber /= BINARY_BASE;
 }

 return binaryNumber;
 }

 /**
 * Converts a decimal number to a binary number using a bitwise algorithm.
 * @param decimalNumber the decimal number to convert
 * @return the binary representation of the decimal number
 */
 public static int convertUsingBitwiseAlgorithm(int decimalNumber) {
 int binaryNumber = 0;
 int position = 1;

 while (decimalNumber > 0) {
 int leastSignificantBit = decimalNumber & 1;
 binaryNumber += leastSignificantBit * position;
 position *= DECIMAL_MULTIPLIER;
 decimalNumber >>= 1;
 }
 return binaryNumber;
 }
}