How to print a parenthesized inorder AVL tree traversal in java

Question

I am trying to print my AVL tree in the following way:

(((10) 20 (30)) 40 (50))

Where 20 is the parent of 10 & 30. 40 is the root and the parent of 20 and 50.

Here are my current methods for printing the tree.

public void printTree(){
    if(isEmpty()){
         System.out.println("Empty tree");
    }else{
        printTree(root);
    }
}

private void printTree(Node t){
    if(t != null){
        printTree(t.left);
        System.out.println(t.element + " ")
        printTree(t.right);
    }
}

The tree currently prints as follows:

10 20 30 40 50

Answer 1

As Rohit Jain commented, just add them in the printTree method:

private void printTree(Node t){
    if(t != null){
        System.out.print("(");
        printTree(t.left);
        System.out.print(t.element + " ")
        printTree(t.right);
        System.out.print(")");
    }
}