实现可比较矩形并排序展示

package _5_12;

public class ComparableRectangle implements Comparable<ComparableRectangle> {

double width;

double height;

public ComparableRectangle(double width, double height) {

this.width = width;

this.height = height;

}

public double getArea() {

return width * height;

}

@Override

public int compareTo(ComparableRectangle o) {

return (int) (getArea() - o.getArea());

}

public String toString() {

return "width=" + width + " height=" + height + " Area=" + getArea();

}

public static void main(String[] args) {

ComparableRectangle[] rectangles = {new ComparableRectangle(3.0, 5.0),

new ComparableRectangle(12.0, 6.0), new ComparableRectangle(7.0, 15.0),

new ComparableRectangle(2.0, 25.0)};

java.util.Arrays.sort(rectangles);

for (ComparableRectangle rectangle : rectangles) {

System.out.println(rectangle.toString() + " ");

}

}

}