public class Node {
  private int content;
  private Node leftNode;
  private Node rightNode;
  
  public Node() {}

  public Node(int content) {
    setContent(content);
  }

  public int getContent() {
    return content;
  }

  public void setContent(int content) {
    this.content = content;
  }

  public Node getLeftNode() {
    return leftNode;
  }

  public Node getRightNode() {
    return rightNode;    
  }

  public boolean isEmpty() {
    if (leftNode == null && rightNode == null) {
      return true;
    }
    return false;
  }

  public void setRightNode(Node node) {
    rightNode = node;
  }

  public void setLeftNode(Node node) {
    leftNode = node;
  }
}