// default constructor
public BST()
{
this.root = null;
}
public void setLeft(BSTNode newLeft)
{
this.left = newLeft;
}
public void setRight(BSTNode newRight)
{
this.right = newRight;
}
// parameterized constructor
public BSTNode(int newData)
{
this.data = newData;
this.left = null;
this.right = null;
}