package p; public interface A { public abstract void m(int i); } class AImpl { A i1 = (int i) -> System.out.println(); A i2 = i -> { System.out.println(); }; A i3 = new A() { @Override public void m(int i) { System.out.println(); } }; private void foo() { A i4 = i -> { System.out.println(); }; } }