title: How to search a collection using lambda expression in Java?
body: <p>There is a <code>Person</code> class (with three elements: <code>person_name</code>, <code>age</code>, <code>sex</code>). There is a <code>List</code> with 100 <code>Person</code> objects.</p>
  
  <p>I need to search this list by <code>person_name</code> and implement the search function with a lambda expression.</p>