Find the most common String in ArrayList()

Question

Is there a way to find the most common String in an ArrayList?

ArrayList list = new ArrayList<>();
list.add(\"t         


        

Answer 1

I think the best way to do it is using maps containing counts.

Map stringsCount = new HashMap<>();

And iterate over your array filling this map:

for(String s: list)
{
  Integer c = stringsCount.get(s);
  if(c == null) c = new Integer(0);
  c++;
  stringsCount.put(s,c);
}

Finally, you can get the most repeated element iterating over the map:

Map.Entry mostRepeated = null;
for(Map.Entry e: stringsCount.entrySet())
{
    if(mostRepeated == null || mostRepeated.getValue()

And show the most common string:

if(mostRepeated != null)
        System.out.println("Most common string: " + mostRepeated.getKey());