java - How can I declare HashMap<String, ArrayList<ArrayList<String>>>? -

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this question has answer here:

i declare hashmap; string key , arraylist of arraylist of string value. 

public map<string,arraylist<arraylist<string>>> idpathmap = new hashmap<string,arraylist<arraylist<string>>>();

but show error:the type hashmap not generic; cannot parameterized arguments <string, arraylist<arraylist<string>>>

how can declare type of hashmap?

but show error:the type hashmap not generic; cannot parameterized arguments >>

you have created own class named hashmap. rename class (it masks java.util.hashmap, if have imported it). or,

public map<string,arraylist<arraylist<string>>> idpathmap =      new java.util.hashmap<string,arraylist<arraylist<string>>>();

or on java 8+

public map<string,arraylist<arraylist<string>>> idpathmap =      new java.util.hashmap<>();

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