如何将OR过滤器应用于java.util.stream？

Question

I have a List :

List<String> mylist=Arrays.asList("Abla","Tbla","Cbla");

I have 2 filters prepared for my stream:

Predicate<String> startswith_A= s-> s.startsWith("A");
Predicate<String> startswith_T= s-> s.startsWith("T");

Following example filters for "A":

mylist.stream().filter(startswith_A).forEach(mystring -> {
    System.out.println("filtered : " + mystring);
});

How can I apply the same for a filter "A" or "T"?

Something like:

mylist.stream().filter(startswith_A || startswith_T).forEach(mystring -> {
    System.out.println("filtered : " + mystring);
});

I don't want to create a new predicate like:

Predicate<String> startswith_A_or_T= s-> s.startsWith("T") || s.startsWith("A");

How can I do this with 2 seperate Predicate s?

Answer 1

You could simply use .or between the 2 Predicates :

mylist.stream()
      .filter(startswith_A.or(startswith_T))
      .forEach(mystring -> { System.out.println("filtered : " + mystring); });

Result:

filtered : Abla
filtered : Tbla