goodring.java

用netbean编写的矩阵乘法和计算多个圆环面积之和

/*
 * 来自 实验5－题目2,被求面积使用
 * 最终程序
 */

public class GoodRing {

    private double innerRadius;
    private double outerRadius;
    private String fillColor;

    public GoodRing() {
        innerRadius = 1;
        outerRadius = 2;
        fillColor = "WHITE";
    }

    public GoodRing(double iRadius, double oRadius, String color) {
        innerRadius = iRadius;
        outerRadius = oRadius;
        fillColor = color;
    }

    public double getArea() {
        return (outerRadius * outerRadius - innerRadius * innerRadius) * Math.PI;
    }

    public double getInnerPerimeter() {
        return 2 * Math.PI * innerRadius;
    }

    public double getOuterPerimeter() {
        return 2 * Math.PI * outerRadius;
    }

    public double getInnerRadius() {
        return innerRadius;
    }

    public void setInnerRadius(double innerRadius) {
        this.innerRadius = innerRadius;
    }

    public double getOuterRadius() {
        return outerRadius;
    }

    public void setOuterRadius(double outerRadius) {
        this.outerRadius = outerRadius;
    }

    public String getFillColor() {
        return fillColor;
    }

    public void setFillColor(String fillColor) {
        this.fillColor = fillColor;
    }
}