How should we manage jdk8 stream for null values

Question

Hello fellow Java developers,

I know the subject may be a bit in advance as the JDK8 is not yet released (and not for now anyway..) but I was reading som

Answer 1

If you just want to filter null values out of a stream, you can simply use a method reference to java.util.Objects.nonNull(Object). From its documentation:

This method exists to be used as a Predicate, filter(Objects::nonNull)

For example:

List list = Arrays.asList( null, "Foo", null, "Bar", null, null);

list.stream()
    .filter( Objects::nonNull )  // <-- Filter out null values
    .forEach( System.out::println );

This will print:

Foo
Bar