Answer Posted / devraj

Collection is an root interface for collection framework and
implemented by collection classes like List,Set ...etc
Whereas Collections is class which contains static methods
to operate on collection classess
EX:
List l=New ArrayList();
l.add("dev");
l.add("raj");
l.add("dev");
l.add("raj");
l.add("dev");
l.add("raj");
now i want to know no of dev in List
like fallowing
System.out.println(Collections.frequency(l,"dev"));

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