HashMap Searching For A Specific Value in Multiple Keys

Question

I\'m checking to see if a key in my HashMap exists, if it does, I also want to check to see if any other keys have a value with the same name as that of the original key I check

Answer 1

As I understand your question, the values in your Map are List. That is, your Map is declares as Map>. If so:

for (List listOfStrings : myMap.values()) [
  if (listOfStrings .contains(searchcourse) {
    // do something
  }
}

If the values are just Strings, i.e. the Map is a Map, then @Matt has the simple answer.