Lambda.java

public class Lambda {

	interface NotRunnable {
		void notRun();
	}

	private final Runnable r = () -> {
		System.out.println("Hello");
	};

	private final NotRunnable r2 = r::run;
}

==================================================================
$ javap -p -c Lambda.class 

Compiled from "Lambda.java"
public class Lambda {
  private final java.lang.Runnable r;

  private final Lambda$NotRunnable r2;

  public Lambda();
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: aload_0
/* vvv here it creates a dynamic implementation of Runnable */
       5: invokedynamic #2,  0              // InvokeDynamic #0:run:()Ljava/lang/Runnable;
      10: putfield      #3                  // Field r:Ljava/lang/Runnable;
      13: aload_0
      14: aload_0
      15: getfield      #3                  // Field r:Ljava/lang/Runnable;
      18: dup
      19: invokevirtual #4                  // Method java/lang/Object.getClass:()Ljava/lang/Class;
      22: pop
/* vvv here it creates a dynamic implementation of NotRunnable */
      23: invokedynamic #5,  0              // InvokeDynamic #1:notRun:(Ljava/lang/Runnable;)LLambda$NotRunnable;
      28: putfield      #6                  // Field r2:LLambda$NotRunnable;
      31: return

/** vvv this is the code for both run() and notRun(). What is "this" in this piece of bytecode? */
  private static void lambda$new$0();
    Code:
       0: getstatic     #7                  // Field java/lang/System.out:Ljava/io/PrintStream;
       3: ldc           #8                  // String Hello
       5: invokevirtual #9                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       8: return
}