OnJava8-Examples/typeinfo/AnonymousImplementation.java

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// typeinfo/AnonymousImplementation.java
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// <20>2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Anonymous inner classes can't hide from reflection.
import typeinfo.interfacea.*;
class AnonymousA {
public static A makeA() {
return new A() {
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public void f() {
System.out.println("public C.f()");
}
public void g() {
System.out.println("public C.g()");
}
void u() {
System.out.println("package C.u()");
}
protected void v() {
System.out.println("protected C.v()");
}
private void w() {
System.out.println("private C.w()");
}
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};
}
}
public class AnonymousImplementation {
public static void main(String[] args) throws Exception {
A a = AnonymousA.makeA();
a.f();
System.out.println(a.getClass().getName());
// Reflection still gets into the anonymous class:
HiddenImplementation.callHiddenMethod(a, "g");
HiddenImplementation.callHiddenMethod(a, "u");
HiddenImplementation.callHiddenMethod(a, "v");
HiddenImplementation.callHiddenMethod(a, "w");
}
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}
/* Output:
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public C.f()
AnonymousA$1
public C.g()
package C.u()
protected C.v()
private C.w()
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*/