downgrade to java 8 for local machine JDK version

Author: fishercoder1534

build.gradle

@@ -11,8 +11,8 @@ checkstyle {
 
 description = """"""
 
-sourceCompatibility = 1.9
-targetCompatibility = 1.9
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
 
 repositories {
     mavenCentral()

src/test/java/com/fishercoder/_247Test.java

@@ -4,6 +4,7 @@
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import java.util.Arrays;
 import java.util.List;
 
 import static org.junit.Assert.assertEquals;
@@ -19,7 +20,7 @@ public static void setup() {
 
   @Test
   public void test1() {
-    expected = List.of("11","69","88","96");
+    expected = Arrays.asList("11","69","88","96");
     assertEquals(expected, solution1.findStrobogrammatic(2));
   }
 

src/test/java/com/fishercoder/_589Test.java

@@ -2,12 +2,13 @@
 
 import com.fishercoder.common.classes.Node;
 import com.fishercoder.solutions._589;
-import java.util.List;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
 
-import static org.junit.Assert.assertArrayEquals;
+import java.util.Arrays;
+import java.util.List;
+
 import static org.junit.Assert.assertEquals;
 
 public class _589Test {
@@ -23,7 +24,7 @@ public static void setup() {
   @Test
   @Ignore//todo: Node.createNaryTree method hasn't been implemented yet
   public void test1() {
-    expectedPreOrder = List.of(1, 3, 5, 6, 2, 4);
+    expectedPreOrder = Arrays.asList(1, 3, 5, 6, 2, 4);
     root = Node.createNaryTree(expectedPreOrder);
     assertEquals(expectedPreOrder, solution1.preorder(root));
   }

src/test/java/com/fishercoder/_700Test.java

@@ -3,11 +3,10 @@
 import com.fishercoder.common.classes.TreeNode;
 import com.fishercoder.common.utils.TreeUtils;
 import com.fishercoder.solutions._700;
-import com.fishercoder.solutions._74;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
-import java.util.List;
+import java.util.Arrays;
 
 import static junit.framework.Assert.assertEquals;
 
@@ -23,8 +22,8 @@ public static void setup() {
 
     @Test
     public void test1() {
-        root = TreeUtils.constructBinaryTree(List.of(4, 2, 7, 1, 3));
-        expected = TreeUtils.constructBinaryTree(List.of(2, 1, 3));
+        root = TreeUtils.constructBinaryTree(Arrays.asList(4, 2, 7, 1, 3));
+        expected = TreeUtils.constructBinaryTree(Arrays.asList(2, 1, 3));
         assertEquals(expected, solution1.searchBST(root, 2));
     }
 }