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