Java 8 Stream String Null Or Empty Filter

Question

I\'ve got Google Guava inside Stream:

this.map.entrySet().stream()
.filter(entity -> !Strings.isNullOrEmpty(entity.getValue()))
.map(obj -> String.form         


        

Answer 1

You can create your own Strings class with your own predicate:

public class Strings {
  public static boolean isNotNullOrEmpty (String str) {
    return str != null && !str.isEmpty();
  }
}

Then in your code:

.filter(Strings::isNotNullOrEmpty)

But as @fge mentionned, you can't use that on a Map.Entry...