AbstractClass.java

/**
 * Created by jayjay on 2016. 11. 27..
 */
public class AbstractClass {
    public static void main(String[] args) {
        NormalClass obj1 = new NormalClass();
//        SomeInterface obj2 = new SomeInterface();
//        SomeAbstractClass obj3 = new A;bstractClass()

        SomeInterface obj2 = new SomeInterface() {
            @Override
            public void method1() {
            }

            @Override
            public void method2() {
            }
        };
        SomeAbstractClass obj3 = new SomeAbstractClass() {
            @Override
            void method1() {

            }
        };
    }

    // JAVA7 기준. Interface의 모든 메소드는 기본적으로 abstract method이다.
    interface SomeInterface {
        void method1();
        public abstract void method2();
    }

    static abstract class SomeAbstractClass {
        abstract void method1();

        void method2() {

        }
    }

    static class NormalClass {

    }
}