这个题目因为没有设计到多态,且自身属性里面包含周长和面积其实有点不合理,以下是代码。
package weimo;
//梯形
public class Ladder {
private double topline; //上底
private double baseline; //下底
private double height; //高
private double area; //面积
//构造方法赋值
public Ladder(double topline, double baseline, double height) {
this.topline = topline;
this.baseline = baseline;
this.height = height;
}
public double getTopline() {
return topline;
}
public void setTopline(double topline) {
this.topline = topline;
}
public double getBaseline() {
return baseline;
}
public void setBaseline(double baseline) {
this.baseline = baseline;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getArea() {
return area;
}
public void setArea(double area) {
this.area = area;
}
//求梯形面积的方法
public double acquireArea(double topline, double baseline, double height){
area = (topline + baseline) * height / 2;
return area;
}
}package weimo;
//圆形
public class Circle {
private double radius; //半径
private double perimeter; //周长
private double area; //面积
//构造方法对半径进行初始化
public Circle(double radius) {
this.radius = radius;
}
public double getRadius() {
return radius;
}
public void setRadius(double radius) {
this.radius = radius;
}
public double getPerimeter() {
return perimeter;
}
public void setPerimeter(double perimeter) {
this.perimeter = perimeter;
}
public double getArea() {
return area;
}
public void setArea(double area) {
this.area = area;
}
//求圆周长
public double acquirePerimeter(double radius){
return 2 * 3.14 * radius;
}
//求圆面积
public double acquireArea(double radius){
return 3.14 * radius * radius;
}
}package weimo;
//测试类
public class Test {
public static void main(String[] args) {
Ladder ladder = new Ladder(3, 4, 2);
System.out.println("梯形的面积为:" + ladder.acquireArea(ladder.getTopline(), ladder.getBaseline(), ladder.getHeight()));
Circle circle = new Circle(1);
System.out.println("圆的周长为:" + circle.acquirePerimeter(circle.getRadius()));
System.out.println("圆的面积为:" + circle.acquireArea(circle.getRadius()));
}
}
输出结果如下(特意设置长度和题目上显示的一样):
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0bd162d9f2d3572c81f825668113632762d0c376?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)