Creating a constructor for an anonymous inner class

  

// : c08:AnonymousConstructor.java
// Creating a constructor for an anonymous inner class.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

abstract class Base {
  public 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");
      }

      public void f() {
        System.out.println("In anonymous f()");
      }
    };
  }

  public static void main(String[] args) {
    Base base = getBase(47);
    base.f();
  }
} ///:~

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Creating a constructor for an anonymous inner class : Inner Class « Class « Java

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