| Return | Method | Summary |
|---|---|---|
| boolean | contains(Object o) | Returns true if this collection contains the specified element. |
| boolean | containsAll(Collection<?> c) | Returns true if this collection contains all of the elements in the specified collection. |
import java.util.ArrayList;
import java.util.Collection;
public class Main {
public static void main(String args[]) {
Collection collection = new ArrayList();
collection.add("java2s.com");
collection.add("j a v a 2 s.com");
collection.add("j a v a 2 s . com");
collection.add("j a v a 2 s . c o m");
System.out.println(collection.contains("java2s.com"));
}
}
The output:
true
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