Consider the following partial code:

public class Item {

private String url;

private float price;

public Item(String url) {

this.url = url;

}

}

Let's first rewrite the constructor of the item class to make it more robust by throwing a MalformedURLException when the given URL is not well-formed. Assume that:

- The java.net. MalformedURLException class is a subclass of the java.io.Exception class, which is a subclass of the java.lang.Exception.

- There is a helper method defined, boolean isWellFormedURL(String), that checks if a string is a well-formed URL.