Dev_Study/Java
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[JAVA / SWING] 프레임 생성하기Dev_Study/Java 2016. 10. 7. 05:10
import javax.swing.JFrame; public class Ex1 extends JFrame { public Ex1(){ setTitle("JFrame 입니다"); setSize(300, 300); setLocationRelativeTo(null); //화면 중앙에 생성 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } public static void main(String[] args) { Ex1 e = new Ex1(); } }
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형변환(Casting) Ex1Dev_Study/Java 2016. 9. 14. 17:28
class Car{ String color; int door; void drive(){ System.out.println("부릉부릉!"); } void stop(){ System.out.println("정지합니다!"); } }//end of Car class class FireEngine extends Car{ void water(){ System.out.println("물을 뿌립니다!"); } }//end of FireEngine class public class CastingTest1 { public static void main(String[] args) { Car car = null; FireEngine fe = new FireEngine(); FireEngine fe2 = null; fe.wat..