AP Computer Science A Question of the Day

public interface Shape2D {

public double getArea();

public double getPerimeter();

}

public class Rectangle {

private double length,width;

public Rectangle(double l,double w) {

length = l;

width = w;

}

public double getArea() {

return length * width;

};

public double getPerimeter() {

return 2 * length + 2 * width;

}

``

}

public interface Rectangle {

private double length,width;

public Rectangle(double l,double w) {

length = l;

width = w;

}

public double getArea();

public double getPerimeter();

}

public interface Person {

private String fName;

private String lName;

public String toString();

}

public interface Person {

private String fName;

private String lName;

public String toString() {

return fName + " " + lName;

}

}