Added day 5 part 2

Author: Gentleman1983

README.md

@@ -23,7 +23,7 @@ To run all solutions, simply run `./gradlew run`. If you want to run the solutio
 | 2       | ⭐       | ⭐       |
 | 3       | ⭐       | ⭐       |
 | 4       | ⭐       | ⭐       |
-| 5       | ❌       | ❌       |
+| 5       | ⭐       | ❌       |
 | 6       | ❌       | ❌       |
 | 7       | ❌       | ❌       |
 | 8       | ❌       | ❌       |
@@ -44,6 +44,6 @@ To run all solutions, simply run `./gradlew run`. If you want to run the solutio
 | 23      | ❌       | ❌       |
 | 24      | ❌       | ❌       |
 | 25      | ❌       | ❌       |
-| **SUM** | **4 ⭐** | **4 ⭐** |
+| **SUM** | **5 ⭐** | **4 ⭐** |
 
-Total: 8 ⭐
+Total: 9 ⭐

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2015'
-version '0.4.3'
+version '0.4.4'
 
 // Switch to gradle "all" distribution.
 wrapper {

day05/README.md

@@ -17,3 +17,24 @@ rules overlap.
 * `dvszwmarrgswjxmb` is naughty because it contains only one vowel.
 
 How many strings are nice?
+
+# Part Two
+Realizing the error of his ways, Santa has switched to a better model of determining whether a string is naughty or 
+nice. None of the old rules apply, as they are all clearly ridiculous.
+
+Now, a nice string is one with all of the following properties:
+* It contains a pair of any two letters that appears at least twice in the string without overlapping, like 
+`xyxy` (`xy`) or `aabcdefgaa` (`aa`), but not like `aaa` (`aa`, but it overlaps).
+* It contains at least one letter which repeats with exactly one letter between them, like `xyx`, `abcdefeghi` (`efe`), 
+or even `aaa`.
+
+For example:
+* `qjhvhtzxzqqjkmpb` is nice because is has a pair that appears twice (`qj`) and a letter that repeats with exactly one 
+letter between them (`zxz`).
+* `xxyxx` is nice because it has a pair that appears twice and a letter that repeats with one between, even though the 
+letters used by each rule overlap.
+* `uurcxstgmygtbstg` is naughty because it has a pair (`tg`) but no repeat with a single letter between them.
+* `ieodomkazucvgmuy` is naughty because it has a repeating letter with one between (`odo`), but no pair that appears 
+twice.
+
+How many strings are nice under these new rules?

day05/src/test/java/de/havox_design/aoc2015/day05/Day05Test.java

@@ -32,4 +32,20 @@ private static Stream<Arguments> getDataForPart1() {
                 Arguments.of("part1sample6.txt", 2)
         );
     }
+
+    @ParameterizedTest
+    @MethodSource("getDataForPart2")
+    void testPart2(String fileName, int expectedNumberOfNiceStrings) {
+        Assertions.assertEquals(expectedNumberOfNiceStrings, NiceStrings.solvePart2(fileName));
+    }
+
+    private static Stream<Arguments> getDataForPart2() {
+        return Stream.of(
+                Arguments.of("part2sample1.txt", 1),
+                Arguments.of("part2sample2.txt", 1),
+                Arguments.of("part2sample3.txt", 0),
+                Arguments.of("part2sample4.txt", 0),
+                Arguments.of("part2sample5.txt", 2)
+        );
+    }
 }

day05/src/test/resources/part2sample1.txt

@@ -0,0 +1 @@
+qjhvhtzxzqqjkmpb

day05/src/test/resources/part2sample2.txt

@@ -0,0 +1 @@
+xxyxx

day05/src/test/resources/part2sample3.txt

@@ -0,0 +1 @@
+uurcxstgmygtbstg

day05/src/test/resources/part2sample4.txt

@@ -0,0 +1 @@
+ieodomkazucvgmuy

day05/src/test/resources/part2sample5.txt

@@ -0,0 +1,4 @@
+qjhvhtzxzqqjkmpb
+xxyxx
+uurcxstgmygtbstg
+ieodomkazucvgmuy