public class TestLamuda {

@Test
public void testLamuda(){
    MyABC myABC = new MyABC();
    myABC.changeState(state -> {
        System.out.println(state);
        return state;
    });
}




interface RunnerABC {
    public String accept(String state);
}


class MyABC {
    public String changeState(RunnerABC abc){
        return abc.accept("");
    }
}

}