Check whether a binary tree is full binary tree or not

Types of binary trees

Problem link

Code:

public class FullBinaryTree {
   
    Node root;
   
    boolean isFullTree(Node node){
       
        if(node == null)
            return true;
       
        if(node.left == null && node.right == null)
            return true;
       
        if(node.left != null && node.right != null)
            return isFullTree(node.left) && isFullTree(node.right);
       
        return false;
           
    }
   
    public static void main(String[] args){
        FullBinaryTree tree = new FullBinaryTree();
       
        tree.root = new Node(10);
        tree.root.left = new Node(20);
        tree.root.right = new Node(30);
        tree.root.left.right = new Node(40);
        tree.root.left.left = new Node(50);
        tree.root.right.left = new Node(60);
        tree.root.left.left.left = new Node(80);
        tree.root.right.right = new Node(70);
        tree.root.left.left.right = new Node(90);
        tree.root.left.right.left = new Node(80);
        tree.root.left.right.right = new Node(90);
        tree.root.right.left.left = new Node(80);
        tree.root.right.left.right = new Node(90);
        tree.root.right.right.left = new Node(80);
        tree.root.right.right.right = new Node(90);
         
        if(tree.isFullTree(tree.root))
            System.out.print("The binary tree is full");
        else
            System.out.print("The binary tree is not full");
       
    }

}


Output:

The binary tree is full

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