求助代码报错要咋改呢

疯狂的小a2018-04-12 19:03

程序代码：

import java.util.Date;
/*题目：
1、定义GeometricObject类，要求如下：

1) 3个私有实例变量，分别是字符串类型的color，布尔类型的filled，Date类型的createdDate

2) 2个构造方法：一个无参，一个带参

3) 实例变量color和filled的访问器和修改器

4) 实例变量createdDate的修改器

5) 重写父类的toString、equals和hashCode方法

2、定义Triangle的类继承自GeometricObject，要求如下：

1) 三个名为side1，side2和side3的double类型私有数据域，初始值均为1.0

2) 2个构造方法

3) side1，side2和side3的访问器和修改器

4) getArea()的方法返回三角形的面积

5) getPerimeter()的方法返回三角形的周长

6) 重写父类的toString、equals和hashCode方法（按照教材给定的规范写）

3、定义Cricle的类继承自GeometricObject，要求如下：

1）1个名为radius的double类型私有数据域，初始值均为1.0

2）2个构造方法

3）radius的访问器和修改器

4）getArea()的方法返回圆的面积

5）getPerimeter()的方法返回圆的周长

6）重写父类的toString、equals和hashCode方法（按照教材给定的规范写）*/
class GeometricObject {
    private String color;
    private boolean filled;
    Date createdDate;

    public GeometricObject(String color, boolean filled, Date createdDate) {
        this.color = color;
        this.filled = filled;
        this.createdDate = createdDate;
    }

    public GeometricObject() {
    }

    public String getColor() {
        return color;
    }

    public void setColor(String co) {
        color = co;
    }

    public boolean isFilled() {
        return filled;
    }

    public void setFilled(boolean fill) {
        filled = fill;
    }

    public Date getCreatedDate() {
        return createdDate;
    }

    public String toString() {
        return "Created on " + createdDate + "\ncolor " + color + " and filled" + filled;
    }
}

class Triangle extends GeometricObject {
    private double side1, side2, side3;

    public Triangle(String color, boolean filled, double side1, double side2, double side3) {
        setColor(color);
        setFilled(filled);
        this.side1 = side1;
        this.side2 = side2;
        this.side3 = side3;

    }

    public double getSide1() {
        return side1;
    }

    public void setSide1(double s1) {
        side1 = s1;
    }

    public double getSide2() {
        return side2;
    }

    public void setSide2(double s2) {
        side2 = s2;
    }

    public double getSide3() {
        return side3;
    }

    public void setSide3(double s3) {
        side3 = s3;
    }

    public Object setArea() {
        return getArea();
    }

    public double getArea() {
        return ((side2 + side3 - side1) / 2 * (side1 + side3 - side2) / 2 * (side1 + side2 - side3) / 2);
    }

    public Object setPerimeter() {
        return getPerimeter();
    }

    public double getPerimeter() {
        return side1 + side2 + side3;
    }

    public void printTriangle() {
        System.out.println(getCreatedDate());
    }

    public String toString() {
        return "Triangle" + side1 + getArea() + getPerimeter();
    }
}

class Circle extends GeometricObject {
    private double radius;

    public Circle(String color, boolean filled, double radius) {
        setColor(color);
        setFilled(filled);
        this.radius = radius;

    }

    public Circle() {
    }

    public double getRadius()

    {
        return radius;
    }

    public void setRadius(double rad) {
        radius = rad;
    }

    public Object setArea() {
        return getArea();
    }

    public double getArea() {
        return radius * radius * Math.PI;
    }

    public double getPerimeter() {
        return 2 * radius * Math.PI;
    }

    public void printCircle() {
        System.out.println(getCreatedDate());
    }

    public String toString() {
        return "Circle" + getArea() + getPerimeter();
    }
}

public class Test {
    public static void main(String[] args) {
        GeometricObject trigle = new Triangle("red", true, 3, 4, 5);
        System.out.println(trigle.getCreatedDate());
        System.out.println(trigle.isFilled());
        System.out.println(((Triangle) trigle).getSide1());
        System.out.println(((Triangle) trigle).getArea());
        System.out.println(((Triangle) trigle).getPerimeter());

        GeometricObject circle = new Circle("blue", false, 12.34);
        System.out.println(circle.getCreatedDate());
        System.out.println(circle.isFilled());
        System.out.println(circle.getColor());
        System.out.println(((Circle) circle).getRadius());
        System.out.println(((Circle) circle).getArea());
        System.out.println(((Circle) circle).getPerimeter());

        GeometricObject[] objArray = new GeometricObject[5];
        objArray[0] = new Circle("blue", false, 1.1);
        objArray[1] = new Circle("yellow", true, 2.1);
        objArray[2] = new Circle("green", false, 3.1);

        objArray[3] = new Triangle("green", false, 3.1, 3.1, 3.1);
        objArray[4] = new Triangle("pink", true, 5.1, 4.1, 8.1);

    }

}

求助代码报错 要咋改呢