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I am new to Java. I have a HashSet of String and I am trying to convert the contains into a String[]. I follow the solution here Converting from HashSet<String> to String[] But still got error. Here is my code:

Set set = new HashSet<String>();
// Add elements into set
// ...
String[] words = set.toArray(new String[set.size()]);

The error I got is "incompatible types: java.lang.Object[] cannot be converted to java.lang.String[]"

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    Why are you not declaring the set initially to be a String Set?: Set<String> e.g., Set<String> set = new HashSet<>(); Commented Jan 17, 2016 at 2:23
  • @ZigZagZebra Don't mix raw types and generics. Commented Jan 17, 2016 at 2:28

1 Answer 1

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Use the obvious solution: Just make it a generic Set<String>.

Set<String> set = new HashSet<>();
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2 Comments

can you tell me why casting set.toArray() to (String[]) isn't acceptable I deleted mine that said that because it got downvoted
@JRowan: the OP is already using generics but incompletely, and if you cast you lose the main reason for using generics -- you lose compile-time type checking. So if you're already using generics, the better answer is to use them correctly, not to cast.

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