point1.java

Java程序设计清华出版课件源码答案共十四章

class Point1 {
	void print() {
		System.out.println("This is the superclass!");
	}

	public static void main(String args[]){
	Point1 superp = new Point1 ();
	superp.print();
	Point3d subp = new Point3d();
	subp.print();
	}
}
	class Point3d extends Point1 {
		void print() {
		System.out.println("This is the subclass!");
		super.print();
	}
}