How to check if TreeMap> contains a value? in Java

Question

I\'m just wondering how to check if TreeMap> contains a value in Java? For Example:

/*I have TreeMap> map with these element         


        

Answer 1

public boolean valueExists(String value){
for(Map.Entry> entry : treeMap.entrySet()) {
  String key = entry.getKey();
  ArrayList values = entry.getValue();
  for (String str:values){
     if (value.equals(str)){
         return true;
     }
  }

}
return false;
}