I have an array of objects, each of which has a number of variables.
I would like to select the "top 20" objects, based on a specific variable.
I think this is really a version of the question: "How can I sort an object array based on a specific object variable?"

So I think that I can provide a simplified example of my question.  Assume the following code:

Employee[] employees;

void setup() {
  employees = new Employee[3];
  employees[0] = new Employee(0,20000.00);
  employees[1] = new Employee(1,40000.00);
  employees[2] = new Employee(2,30000.00);
}

class Employee {
  String firstName;
  String lastName;
  int employeeID;
  float salary;

  Employee(int employeeID_, float salary_) {
    employeeID = employeeID_;
    salary = salary_;
  }
}

How could I sort this array based on salary (...and then ideally put the results in a new array)?
Based on web research so far, I am seeing some information about using Comparators in Java, but I'm wondering how I would embed a Comparator in Processing  so it worked properly. 

(I have experience coding Processing, but not Java.)

Thanks for any assistance anyone can provide!