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import org.junit.jupiter.api.Test;
import java.util.HashMap;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.assertEquals;
/*
Week 192:
https://theweeklychallenge.org/blog/perl-weekly-challenge-192
Task 1: Binary Flip
You are given a positive integer, $n.
Write a script to find the binary flip.
*/
public class main {
public static Map<Character, Character> binaryNumberMap = new HashMap();
static {
binaryNumberMap.put('0', '1');
binaryNumberMap.put('1', '0');
}
public static void main(String[] args) {}
public static Integer binaryFlip(Integer number) {
var flippedBinaryNumber = new StringBuilder();
for (char c : Integer.toBinaryString(number).toCharArray()) {
flippedBinaryNumber.append(binaryNumberMap.get(c));
}
return Integer.parseInt(flippedBinaryNumber.toString(), 2);
}
@Test
public void binaryFlipTest() {
assertEquals(binaryFlip(5), 2, "Example 1 Failed.");
assertEquals(binaryFlip(4), 3, "Example 2 Failed.");
assertEquals(binaryFlip(6), 1, "Example 3 Failed.");
}
}
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