OnJava8-Examples/innerclasses/AnonymousConstructor.java at master · xinan-w/OnJava8-Examples · GitHub

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// innerclasses/AnonymousConstructor.java

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

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

// Creating a constructor for an anonymous inner class

abstract class Base {

Base(int i) {

System.out.println("Base constructor, i = " + i);

}

public abstract void f();

}

public class AnonymousConstructor {

public static Base getBase(int i) {

return new Base(i) {

{ System.out.println(

"Inside instance initializer"); }

@Override public void f() {

System.out.println("In anonymous f()");

}

};

}

public static void main(String[] args) {

Base base = getBase(47);

base.f();

}

/* Output:

Base constructor, i = 47

Inside instance initializer

In anonymous f()

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