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

You're testing to see whether the map contains a String, "square"-- but the values in your map are ArrayList<String> objects.

If you know that you're looking for a shape, you can first get the "shape" list, and test to see whether it contains the specific shape "square".

  ArrayList<String> shapes = map.get("shape");
  boolean containsSquare = shapes.contains("square");

Answer 2

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

}
return false;
} 

Answer 3

Something like below would work

 Map<String,ArrayList<String>> map=new TreeMap<String, ArrayList<String>>();
            Collection<ArrayList<String>> values=map.values();
            for(ArrayList<String> list:values)
            {
                list.contains("text_to_search")
                {

                }
            }