| Return | Method | Summary |
|---|---|---|
| int | size() | Returns the number of elements in this set (its cardinality). |
import java.util.HashSet;
public class Main {
public static void main(String args[]) {
HashSet<String> hs = new HashSet<String>();
hs.add("java2s.com");
hs.add("A");
hs.add("D");
hs.add("E");
hs.add("C");
hs.add("j a v a2s.com");
System.out.println(hs.size());
hs.remove("A");
System.out.println(hs.size());
}
}
The output:
6
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