Build method for a tree

[vampgirl13]

I have this build method for my expression tree. I want to build it in infix but its not coming out correctly. So, I was wondering if anyone can help me. Thanks.

private TreeNode build(Scanner input)

	{

		boolean leaf;

		String token;

		int value;

		TreeNode node;

		leaf = input.hasNextInt();

		if (leaf)

		{

			value = input.nextInt();

			node = new TreeNode(leaf, '\0', value);

		}

		else

		{

			token = input.next();

			node = new TreeNode(leaf, token.charAt(0), 0);

			node.left = build(input);

			node.right = build(input);

		}

		return node;

	}