How to serialize a lambda?

Question

How can I elegantly serialize a lambda?

For example, the code below throws a NotSerializableException. How can I fix it without creating a Seriali

Answer 1

The same construction can be used for method references. For example this code:

import java.io.Serializable;

public class Test {
    static Object bar(String s) {
        return "make serializable";
    }

    void m () {
        SAM s1 = (SAM & Serializable) Test::bar;
        SAM s2 = (SAM & Serializable) t -> "make serializable";
    }

    interface SAM {
        Object action(String s);
    }
}

defines a lambda expression and a method reference with a serializable target type.