Searching an array list of objects

Question

How would I search for the employee "Tim"?

ArrayList <ClassName> employee = new ArrayList <ClassName>();
   employee.add(new ClassName("Name","Department",phoneNumber,"address")); 
   employee.add(new ClassName("Tim","something",9803845994,"something St"));

Kakarot · Accepted Answer · 2014-05-08 21:27:25Z

3

Option 1 : Loop through the ArrayList to find the employee

  for(ClassName emp :  enployee)
  {
      if("Tim".equals(emp.getName()))
      {
           // do something
           break;
      }
  }

Option 2 : Store the employees in some fast searchable data structure like a HashMap

  Map<String, ClassName> employeeMap = new HashMap<>();
  employeeMap.add("Tim",  new ClassName("Tim","something",9803845994,"something St"));
  employeeMap.add("Jack",  new ClassName("Jack","something",22222222,"something St"));

No searching is very simple

  Employee emp = employeeMap.get("Tim");

edited May 8, 2014 at 21:27

answered May 8, 2014 at 21:21

Kakarot

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1 Comment

lgraham076 Over a year ago

Just wanted to point out Option 2 only works if the employee name is distinct, as in adding another Tim will overwrite the other one

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