27.1 Use anonymous inner classes

Package Penalty for . day27_ inner classes Anonymous inner classes;
 / * 
 * anonymous inner classes: 
 * Anonymous inner classes can be seen as a local inner class with no name 
 * defined in the method which 
 * he must be created in the definition of anonymous inner class time Object 
 * format: 
 *          new new classes / interfaces () { 
 * If you are creating a subclass object inherits this class, we can override the parent class 
 * If you implement this interface subclass object is created, we have to realize All methods of the interface 
 *}; 
 * principle: instead create subclasses of objects of this class or subclass object is created to achieve this interface 
 * 
 * / 
public  class InnerDemo3 {
     public  static  void main (String [] args) { 
        Dog D = new new Dog (); 
        d.fun (); 
    } 
} 

class{Animal
     public  void EAT () { 
        System.out.println ( "eat" ); 
    } 
} 

// normal writing 
class Cat the extends Animal { 
    @Override 
    public  void EAT () { 
        System.out.println ( "cat fish" ); 
    } 
} 

// anonymous inner classes (no name partial internal) writing 
class dog {
     public  void Fun () {
         / * new new Animal () { 
            @Override 
            public void EAT () { 
                System.out.println ( "dog meat ");  
            }
        } .eat ();
        */
        Animal a = new Animal() {
            @Override
            public void eat() {
                System.out.println("狗吃肉");
            }
        };

        a.eat();
        a.eat();
    }
}

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Two, new interfaces

public class InnerDemo4 {
    public static void main(String[] args) {
        Outer o = new Outer();
        o.method();
    }
}

interface Inner {
    public void fun();
}

class Outer {
    public void method() {
        /*
        new Inner() {

            @Override
            public void fun() {
                System.out.println("i am fun");
            }
        }.fun();
        */

        Inner i = new Inner() {

            @Override
            public void fun() {
                System.out.println("i am fun");
            }
        };
        i.fun();
        i.fun();
    }
}

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