package com.baeldung.printbinarytree; public class BinaryTreeModel { private Object value; private BinaryTreeModel left; private BinaryTreeModel right; public BinaryTreeModel(Object value) { this.value = value; } public Object getValue() { return value; } public void setValue(Object value) { this.value = value; } public BinaryTreeModel getLeft() { return left; } public void setLeft(BinaryTreeModel left) { this.left = left; } public BinaryTreeModel getRight() { return right; } public void setRight(BinaryTreeModel right) { this.right = right; } }