Trees

To create the tree nodes

`

public class BTree {
static Root root;

private class Root {
    private Root left;
    private Root right;
    int val;

    public Root(int val) {
        this.val = val;
    }
}

    public void createTree() {
        Root r = new Root(2);
        Root rl = new Root(4);
        Root rr = new Root(4);
        root = r;
        r.left = rl;
        r.right = rr;
    }

    public void printTree(Root root) {
        if (root == null) return;
        printTree(root.left);
        System.out.println(root.val);
        printTree(root.right);
    }

    public static void main(String[] args) {
       BTree bt=new BTree();
       bt.createTree();
       bt.printTree(bt.root);
   }
}

`