I am wondering since the HashSet is implemented via a HashMap instance , what would be the key that would be used to put data into HashSet.
Looking at the source of Java 6, HashSet<E> is actually implemented using HashMap<E,Object>, using dummy object instance on every entry of the Set.
I need to create a Set with initial va开发者_如何学运维lues. Set<String> h = new HashSet<String>();
I\'ve got a whitelist of URLs I\'m using, inside a HashSet<string>. I\'m trying to find if the url starts with any of the items in the white list (it has to be that way round).
I am working on a project that involves me using a HashSet of a class I made, which I will name Test. I defined the stated HashSet like so:
This question already has answers here: What is a NullPointerException, and how do I fix it? (12 answers)
I have this code in a reserved word boolean format: private boolean isIdent(String t) { if (equals(t, \"final\") || equals(t, \"int\") || equals(t, \"while\")
Ive managed to parse the entire contents of a given input text file and store each word in a hash set. But now i need to find the freq开发者_运维问答uenct of each of these words in this input file, an
I\'m using a ListBox to maintain a list of items in a WPF application.The ListBox data source is a HashSet wrapped in an ObservableCollection.ie, I have the following code :
I have been trying to understand the internal implementation of java.util.HashMap and java.util.HashSet.
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