Fix lint

Author: Hardvan

src/main/java/com/thealgorithms/others/SkylineProblem.java

@@ -110,8 +110,10 @@ public List<Skyline> findSkyline(int start, int end) {
     public List<Skyline> mergeSkyline(List<Skyline> sky1, List<Skyline> sky2) {
         Objects.requireNonNull(sky1, "sky1 must not be null");
         Objects.requireNonNull(sky2, "sky2 must not be null");
-        int i = 0, j = 0;
-        int h1 = 0, h2 = 0;
+        int i = 0;
+        int j = 0;
+        int h1 = 0;
+        int h2 = 0;
         int prevHeight = 0;
         List<Skyline> result = new ArrayList<>();
         while (i < sky1.size() && j < sky2.size()) {
@@ -177,8 +179,12 @@ public Skyline(int coordinates, int height) {
 
         @Override
         public boolean equals(Object o) {
-            if (this == o) return true;
-            if (o == null || getClass() != o.getClass()) return false;
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
             Skyline skyline = (Skyline) o;
             return coordinates == skyline.coordinates && height == skyline.height;
         }

src/test/java/com/thealgorithms/others/SkylineProblemTest.java

@@ -1,11 +1,14 @@
 package com.thealgorithms.others;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import java.util.*;
+import java.util.List;
 import org.junit.jupiter.api.Test;
 
-public class SkylineProblemTest {
+class SkylineProblemTest {
 
     @Test
     void testSingleBuildingSkyline() {
@@ -95,8 +98,18 @@ void testFindSkylineInvalidCases() {
     @Test
     void testMergeSkylineNullCases() {
         SkylineProblem skylineProblem = new SkylineProblem();
-        Exception ex1 = assertThrows(NullPointerException.class, () -> skylineProblem.mergeSkyline(null, List.of()));
-        Exception ex2 = assertThrows(NullPointerException.class, () -> skylineProblem.mergeSkyline(List.of(), null));
+        Exception ex1 = assertThrows(NullPointerException.class, new org.junit.jupiter.api.function.Executable() {
+            @Override
+            public void execute() {
+                skylineProblem.mergeSkyline(null, List.of());
+            }
+        });
+        Exception ex2 = assertThrows(NullPointerException.class, new org.junit.jupiter.api.function.Executable() {
+            @Override
+            public void execute() {
+                skylineProblem.mergeSkyline(List.of(), null);
+            }
+        });
         assertTrue(ex1.getMessage().contains("sky1"));
         assertTrue(ex2.getMessage().contains("sky2"));
     }