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/**方法重载(Overloading)：如果有两个方法的方法名相同，但参数不一致，哪么可以说一个方法是另一个方法的重载。

*方法覆盖（Overriding）：如果在子类中定义一个方法，其名称、返回类型及参数签名正好与父类中某个方法的名称、返回类型及参数签名相匹配，那么可以说，子类的方法覆盖了父类的方法

*/

public class OverRidingClass{

public static void main (String []agrs){

Figure f= new Figure(10 , 10);

Rectangle r= new Rectangle(9 , 5);

Figure figref;

figref=f;

System.out.println("Area is :"+figref.area());

figref=r;

System.out.println("Area is :"+figref.area());

}

}

class Figure{

double dim1;

double dim2;

Figure(double a , double b) {

dim1=a;

dim2=b;

}

Double area() {

System.out.println("Inside area for figure.");

return(dim1*dim2);

}

}

class Rectangle extends Figure {

Rectangle(double a, double b) {

super(a ,b);

}

Double area() {

System.out.println("Inside area for rectangle.");

return(dim1*dim2);

}

}