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refactor: OnesComplement Tests Using Parameterized Inputs (#6375)

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refactor: OnesComplement Tests Using Parameterized Inputs

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
This commit is contained in:
Oleksandr Klymenko
2025-07-14 08:51:17 +03:00
committed by GitHub
parent 933e929b54
commit 25aaa6e064
2 changed files with 31 additions and 11 deletions
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25
src/main/java/com/thealgorithms/bitmanipulation/OnesComplement.java
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@@ -12,15 +12,24 @@ public final class OnesComplement {
private OnesComplement() {
}
// Function to get the 1's complement of a binary number
/**
* Returns the 1's complement of a binary string.
*
* @param binary A string representing a binary number (e.g., "1010").
* @return A string representing the 1's complement.
* @throws IllegalArgumentException if the input is null or contains characters other than '0' or '1'.
*/
public static String onesComplement(String binary) {
StringBuilder complement = new StringBuilder();
// Invert each bit to get the 1's complement
for (int i = 0; i < binary.length(); i++) {
if (binary.charAt(i) == '0') {
complement.append('1');
} else {
complement.append('0');
if (binary == null || binary.isEmpty()) {
throw new IllegalArgumentException("Input must be a non-empty binary string.");
}
StringBuilder complement = new StringBuilder(binary.length());
for (char bit : binary.toCharArray()) {
switch (bit) {
case '0' -> complement.append('1');
case '1' -> complement.append('0');
default -> throw new IllegalArgumentException("Input must contain only '0' and '1'. Found: " + bit);
}
}
return complement.toString();