Ex9_1 코드

package org.javaro.lecture; public class Ex9_1 { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("조병수-20191114-인터페이스"); KHello khello1=new KHello(); khello1.goodMorning(); khello1.goodNight(); } } interface GoodMorning{ abstract void goodMorning(); } interface GoodNight{ abstract void goodNight(); } class KHello implements GoodMorning, GoodNight{ public void goodMorning() { System.out.println("좋은 아침"); } public void goodNight() { System.out.println("좋은 저녁"); } }

실행창

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