[Java] 상속

main_inheritance.java

package _05_inheritance;
class A {
	int aa = 10;
}
class B extends A{
	int bb = 200;
}
class C extends A{
	int cc = 5000;
}
class D extends C{
	int dd = 30000;
}
public class T01_main_inheritance {
	public static void main(String[] args) {
		A a1 = new A();
		System.out.println("a1.aa : " + a1.aa);
		
		B b1 = new B();
		System.out.println("b1.aa : " + b1.aa);
		System.out.println("b1.bb : " + b1.bb);
		
		C c1 = new C();
		System.out.println("c1.aa : " + c1.aa);
		System.out.println("c1.cc : " + c1.cc);
		
		D d1 = new D();
		System.out.println("d1.aa : " + d1.aa);
		System.out.println("d1.cc : " + d1.cc);
		System.out.println("d1.dd : " + d1.dd);
	}
}