MethodReferenceTests

import org.junit.Test;

public class MethodReferenceTests {

    @Test
    public void testMethodReferenceVsLambda () {

        Runnable r1 = () -> new Counter().print();
        Runnable r2 = new Counter()::print;

        r1.run();
        r1.run();

        r2.run();
        r2.run();
    }
}

class Counter {

    private static int count;
    private int myCount;

    Counter() {
        this.myCount = count++;
    }

    void print() {
        System.out.println("myCount = " + this.myCount);
    }
}