A method that returns an anonymous inner class : Anonymous inner class « Class Definition « Java Tutorial

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Java Tutorial » Class Definition » Anonymous inner class

5. 15. 9. A method that returns an anonymous inner class


public class MainClass {

  public A cont() {

    return new A() {

      private int i = 11;



      public int value() {

        return i;

      }

    }; // Semicolon required in this case

  }



  public static void main(String[] args) {

    MainClass p = new MainClass();

    A c = p.cont();

  }

}



interface A {

  int value();

}

5. 15. Anonymous inner class
	5. 15. 1.	Demonstrate an inner class.
	5. 15. 2.	Define an inner class within a for loop.
	5. 15. 3.	Use anonymous inner classes
	5. 15. 4.	Building the anonymous inner class in-place
	5. 15. 5.	Anonymous inner class cannot have a named constructor, only an instance initializer
	5. 15. 6.	Creating a constructor for an anonymous inner class
	5. 15. 7.	Using 'instance initialization' to perform construction on an anonymous inner class
	5. 15. 8.	Argument must be final to use inside anonymous inner class
	5. 15. 9.	A method that returns an anonymous inner class
	5. 15. 10.	An anonymous inner class that calls the base-class constructor
	5. 15. 11.	An anonymous inner class that performs initialization
	5. 15. 12.	Demonstrates method-scoped inner classes
	5. 15. 13.	Demonstrates anonymous classes
	5. 15. 14.	Demonstration of some static nested classes
	5. 15. 15.	Access inner class from outside
	5. 15. 16.	Accessing its enclosing instance from an inner class

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