// generics/Manipulation.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// {WillNotCompile}

class Manipulator<T> {

private T obj;

Manipulator(T x) { obj = x; }

// Error: cannot find symbol: method f():

public void manipulate() { obj.f(); }

}

public class Manipulation {

public static void main(String[] args) {

HasF hf = new HasF();

Manipulator<HasF> manipulator =

new Manipulator<>(hf);

manipulator.manipulate();

}

}