Why I can not use Hashtable in Java?

  • 0

    I noticed this problem on other tasks also. When I try to compile the following snipet:

    Hashtable<Integer, Integer> ht = new Hashtable<Integer, Integer>();

    I got the following error message:

    error: cannot find symbol: class Hashtable


  • 2

    The class you're looking for is HashMap.

  • 0

    I don't think leetcode support all the library of Java. There is a time that I tried to use StringTokenizer and end up with the same error message as yours. In this case, just use the HashMap<>();

  • 0

    You can include any missing library using import statement in your code

    import java.util.Hashtable;

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