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Find element in a collection in java using streams
// this returns a list
public Collection<Employee> findName(Collection<Employee> collection, String name) {
return collection.stream().filter(e -> e.firstName.equals(name)).collect(Collectors.toList());
}
// if we want to return a set (and therefore guarantee uniqueness)
public Collection<Employee> findName(Collection<Employee> collection, String name) {
return collection.stream().filter(e -> e.firstName.equals(name)).collect(Collectors.toList());
}
// or if we want to use a specialized collection class
public Collection<Employee> findName(Collection<Employee> collection, String name) {
return collection.stream().filter(e -> e.firstName.equals(name)).collect(Collectors.toCollection(() -> new LinkedBlockingQueue<>()));
}
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