supertest.java

来自「Java程序设计培训教程2」· Java 代码 · 共 28 行

class ParentClass{
	double d;
	void setDouble(double s){
		d = s;
	}
	void Print(){
		System.out.println("This is in super class.");
		System.out.println("In super class,d = "+d);
	}
}
class SubClass extends ParentClass{
	double d;
	SubClass(){
		d = 10.0;
	}
	void Print(){
		super.setDouble(20.0);
		super.Print();
		System.out.println("This is in sub class.");
		System.out.println("In sub class,d = "+d);
	}
}
public class SuperTest{
	public static void main(String args[]){
		SubClass subObj = new SubClass();
		subObj.Print();
	}
}