AnytoAny.java

package com.thealgorithms.conversions;

/**
 * A utility class for converting numbers from any base to any other base.
 *
 * This class provides a method to convert a source number from a given base
 * to a destination number in another base. Valid bases range from 2 to 10.
 */
public final class AnytoAny {
 private AnytoAny() {
 }

 /**
 * Converts a number from a source base to a destination base.
 *
 * @param sourceNumber The number in the source base (as an integer).
 * @param sourceBase The base of the source number (between 2 and 10).
 * @param destBase The base to which the number should be converted (between 2 and 10).
 * @throws IllegalArgumentException if the bases are not between 2 and 10.
 * @return The converted number in the destination base (as an integer).
 */
 public static int convertBase(int sourceNumber, int sourceBase, int destBase) {
 if (sourceBase < 2 || sourceBase > 10 || destBase < 2 || destBase > 10) {
 throw new IllegalArgumentException("Bases must be between 2 and 10.");
 }

 int decimalValue = toDecimal(sourceNumber, sourceBase);
 return fromDecimal(decimalValue, destBase);
 }

 /**
 * Converts a number from a given base to its decimal representation (base 10).
 *
 * @param number The number in the original base.
 * @param base The base of the given number.
 * @return The decimal representation of the number.
 */
 private static int toDecimal(int number, int base) {
 int decimalValue = 0;
 int multiplier = 1;

 while (number != 0) {
 decimalValue += (number % 10) * multiplier;
 multiplier *= base;
 number /= 10;
 }
 return decimalValue;
 }

 /**
 * Converts a decimal (base 10) number to a specified base.
 *
 * @param decimal The decimal number to convert.
 * @param base The destination base for conversion.
 * @return The number in the specified base.
 */
 private static int fromDecimal(int decimal, int base) {
 int result = 0;
 int multiplier = 1;

 while (decimal != 0) {
 result += (decimal % base) * multiplier;
 multiplier *= 10;
 decimal /= base;
 }
 return result;
 }
}