What are static factory methods?

Question

What\'s a \"static factory\" method?

Answer 1

Java implementation contains utilities classes java.util.Arrays and java.util.Collections both of them contains static factory methods, examples of it and how to use :

• Arrays.asList("1","2","3")

• Collections.synchronizedList(..), Collections.emptyList(), Collections.unmodifiableList(...) (Only some examples, could check javadocs for mor methods examples https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html)

Also java.lang.String class have such static factory methods:

• String.format(...), String.valueOf(..), String.copyValueOf(...)