How to prevent the arrowhead anti-pattern

Question

I\'m a bit confused about how to best refactor my code into something more readable.

Consider this piece of code:

var foo = getfoo();
if(foo!=null)
{         


        

Answer 1

try
{
  if (getcow(getmoo(getbar(getfoo()))) == null)
  {
    throw new NullPointerException();
  }
catch(NullPointerException ex)
{
  return; //or whatever you want to do when something is null
}

//... rest of the method

This keeps the main logic of the method uncluttered, and has just one exceptional return. Its disadvantages are that it can be slow if the get* methods are slow, and that it is difficult to tell in a debugger which method returned the null value.