java convenction changes

src/main/java/com/thealgorithms/datastructures/trees/BSTIterative.java

@@ -10,10 +10,10 @@
  * <p>
  * An implementation of BST iteratively. Binary Search Tree is a binary tree
  * which satisfies three properties: left child is less than root node, right
- * child is grater than root node, both left and right childs must themselves be
+ * child is grater than root node, both left and right child must themselves be
  * a BST.
  *
- * @author [Lakhan Nad](https://github.com/Lakhan-Nad)
+ * @author [Lakhan Nad](<a href="https://github.com/Lakhan-Nad">git-Lakhan Nad</a>)
  */
 
 public class BSTIterative {

src/main/java/com/thealgorithms/datastructures/trees/BSTRecursive.java

@@ -17,7 +17,7 @@
  * I have made public functions as methods and to actually implement recursive
  * approach I have used private methods
  *
- * @author [Lakhan Nad](https://github.com/Lakhan-Nad)
+ * @author [Lakhan Nad](<a href="https://github.com/Lakhan-Nad">git-Lakhan Nad</a>)
  */
 public class BSTRecursive {
 

src/main/java/com/thealgorithms/datastructures/trees/BSTRecursiveGeneric.java

@@ -9,10 +9,10 @@
  * <p>
  * A recursive implementation of generic type BST.
  *
- * Reference: https://en.wikipedia.org/wiki/Binary_search_tree
+ * Reference: <a href="https://en.wikipedia.org/wiki/Binary_search_tree">Wiki links for BST</a>
  * </p>
  *
- * @author [Madhur Panwar](https://github.com/mdrpanwar)
+ * @author [Madhur Panwar](<a href="https://github.com/mdrpanwar">git-Madhur Panwar</a>)
  */
 public class BSTRecursiveGeneric<T extends Comparable<T>> {
 
@@ -219,7 +219,7 @@ private void inOrderSort(Node<T> node, List<T> sortedList) {
     }
 
     /**
-     * Serach recursively if the given value is present in BST or not.
+     * Search recursively if the given value is present in BST or not.
      *
      * @param node the node under which to check
      * @param data the value to be checked

src/main/java/com/thealgorithms/datastructures/trees/CeilInBinarySearchTree.java

@@ -39,7 +39,7 @@
  * ii) If key is lesser than root value than ceil will be in right subtree so
  * call recursively on right subtree iii) if key is greater than current root,
  * then either a) the root is ceil b) ceil is in left subtree: call for left
- * subtree. If left subtree returns a non null value then that will be ceil
+ * subtree. If left subtree returns a non-null value then that will be ceil
  * otherwise the root is ceil
  */
 public class CeilInBinarySearchTree {

src/main/java/com/thealgorithms/datastructures/trees/CheckIfBinaryTreeBalanced.java

@@ -12,7 +12,7 @@
  * `isBalancedRecursive()` is implemented in a recursive fashion, and
  * `isBalancedIterative()` is implemented in an iterative fashion.
  *
- * @author [Ian Cowan](https://github.com/iccowan)
+ * @author [Ian Cowan](<a href="https://github.com/iccowan">Git-Ian Cowan</a>)
  */
 public class CheckIfBinaryTreeBalanced {
     /**

src/main/java/com/thealgorithms/datastructures/trees/CheckTreeIsSymmetric.java

@@ -39,16 +39,16 @@ public static boolean isSymmetric(Node root) {
         return isSymmetric(root.left, root.right);
     }
 
-    private static boolean isSymmetric(Node leftSubtreeRoot, Node rightSubtreRoot) {
-        if (leftSubtreeRoot == null && rightSubtreRoot == null) {
+    private static boolean isSymmetric(Node leftSubtreeRoot, Node rightSubtreeRoot) {
+        if (leftSubtreeRoot == null && rightSubtreeRoot == null) {
             return true;
         }
 
-        if (isInvalidSubtree(leftSubtreeRoot, rightSubtreRoot)) {
+        if (isInvalidSubtree(leftSubtreeRoot, rightSubtreeRoot)) {
             return false;
         }
 
-        return isSymmetric(leftSubtreeRoot.right, rightSubtreRoot.left) && isSymmetric(leftSubtreeRoot.left, rightSubtreRoot.right);
+        return isSymmetric(leftSubtreeRoot.right, rightSubtreeRoot.left) && isSymmetric(leftSubtreeRoot.left, rightSubtreeRoot.right);
     }
 
     private static boolean isInvalidSubtree(Node leftSubtreeRoot, Node rightSubtreeRoot) {

src/main/java/com/thealgorithms/datastructures/trees/GenericTree.java

@@ -16,24 +16,24 @@
  */
 public class GenericTree {
 
-    private class Node {
+    private static class Node {
 
         int data;
         ArrayList<Node> child = new ArrayList<>();
     }
 
-    private Node root;
+    private final Node root;
     public GenericTree() { // Constructor
         Scanner scn = new Scanner(System.in);
         root = create_treeG(null, 0, scn);
     }
 
-    private Node create_treeG(Node node, int childindx, Scanner scn) {
+    private Node create_treeG(Node node, int childIndex, Scanner scanner) {
         // display
         if (node == null) {
             System.out.println("Enter root's data");
         } else {
-            System.out.println("Enter data of parent of index " + node.data + " " + childindx);
+            System.out.println("Enter data of parent of index " + node.data + " " + childIndx);
         }
         // input
         node = new Node();

src/main/java/com/thealgorithms/datastructures/trees/LCA.java

@@ -5,7 +5,7 @@
 
 public class LCA {
 
-    private static Scanner scanner = new Scanner(System.in);
+    private static final Scanner scanner = new Scanner(System.in);
 
     public static void main(String[] args) {
         // The adjacency list representation of a tree:
@@ -91,7 +91,7 @@ private static int getLCA(int v1, int v2, int[] depth, int[] parent) {
         return v1;
     }
 }
-/**
+/*
  * Input:
  * 10
  * 0 1