ImmutableStatelessInterfaceInstanceForThread.java

package p;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Created by nkonev on 22.05.17.
 */
public class ImmutableStatelessInterfaceInstanceForThread {
    public static void main(String[] args) throws InterruptedException {
        // this is lambda which implicitly creates MyRunnable instance with getContext() method which returns new MyRunnable.MyContext
        // casting to MyRunnable is required
        Thread thread = new Thread((MyRunnable) () -> new MyRunnable.MyContext(666, "Никита"));
        thread.start();
        thread.join();
    }

    private interface MyRunnable extends Runnable {
        // interface allows only static final which forces you make immutably Runnables
        Logger LOGGER = LoggerFactory.getLogger(MyRunnable.class);

        MyContext getContext();

        @Override
        default void run() {
            final MyContext c = getContext();
            LOGGER.info("hello, #{} {}", c.getId(), c.getName());
        }

        class MyContext {
            private final int id;
            private final String name;

            public MyContext(int id, String name) {
                this.id = id;
                this.name = name;
            }

            public int getId() {
                return id;
            }

            public String getName() {
                return name;
            }
        }
    }
}