7일차 Data Hiding

//교재143p
public class Class4 {
	public static void main(String[] args) {
		//클래스를 사용(이용)하기 위해서는 객체 생성이 필요하다
		Point2 p; //선언,String name;
		p = new Point2(); //객체 만드는 문법.
		
		System.out.println(p.y);//p객체안의 y필드값
		
		//x값을 알고 싶다
		//System.out.println(p.x);//is not visible
		System.out.println(p.getX());
		
		WestWomen women=new WestWomen();
		//System.out.println(women.age);//데이터 은닉
		System.out.println(women.getAge());
	}
}

class WestWomen{
	private int age=30;
	private boolean isMarried=false;
	
	public int getAge(){
		return age;
	}
}

class Point2{
	//필드
	private int x=100; //private 접근 지정자 (Data Hiding,은닉)-교재136p
	public int y=200;
	
	public int getX(){
		return x;
	}
}