How to remove all null elements from a ArrayList or String Array?

Question

I try with a loop like that

// ArrayList tourists

for (Tourist t : tourists) {
    if (t != null) {     
        t.setId(idForm); 
    }   
}

Answer 1

I used the stream interface together with the stream operation collect and a helper-method to generate an new list.

tourists.stream().filter(this::isNotNull).collect(Collectors.toList());

private  boolean isNotNull(final T item) {
    return  item != null;
}