求代码，感觉还是太菜，像求大神写代码以作参考

求代码，感觉还是太菜，像求大神写代码以作参考，求大神写上代码，

你这也太懒了吧，把问题打出来啊！！

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哥们，把问题打出来，或者你把图换个方向。颈椎不好

我扭着脑袋读完了你的题目

编写一个Octagon类，它扩展GeometricObject类并实现Comparable 和Cloneable接口，假设八边形八条边的边长相等，编写一个测试程序，创建一个边长值为5的Octagon 对象，然后显示它的周长和面积。使用colon 方法创建一个新对象，并使用compareTo 方法比较这两个对象

package tempTest;

/*编写一个Octagon类，它扩展GeometricObject类并实现Comparable

• 和Cloneable接口，假设八边形八条边的边长相等，编写一个测试程序，
• 创建一个边长值为5的Octagon 对象，然后显示它的周长和面积。

• 使用colon 方法创建一个新对象，并使用compareTo 方法比较这两个对象*/
  public class Octagon extends GeometricObject implements Comparable, Cloneable{

  private double edgeLength;

  public double getEdgeLength() {
  return edgeLength;
  }
  public void setEdgeLength(double edgeLength) {
  this.edgeLength = edgeLength;
  }
  public Octagon(double edgeLength) {
  this.edgeLength = edgeLength;
  }
  @Override
  public double getArea() {
  double edl2p = Math.pow(edgeLength, 2);
  double sqrt2 = Math.sqrt(2);
  return (2+2*sqrt2)*edl2p;
  }

  @Override
  public double getPerimeter() {
  return 8*edgeLength;
  }

  @Override
  public int compareTo(Octagon o) {
  if(o.getArea()==getArea()) {
  return 0;
  }else {
  return (getArea()-o.getArea()) > 0?1:-1;
  }
  }

  @Override
  protected Octagon clone() throws CloneNotSupportedException {
  Octagon octagon = null;
  octagon = (Octagon)super.clone();
  octagon.setEdgeLength(edgeLength);
  return octagon;
  }
  }

package tempTest;

import java.util.Date;

public abstract class GeometricObject {
private String color = "white";
private boolean filled;
Date dateCreated;

protected GeometricObject() {
    dateCreated = new Date();
}

protected GeometricObject(String color, boolean filled) {
    this.color = color;
    this.filled = filled;
    Date dateCreated = new Date();
}

public String getColor() {
    return color;
}

public void setColor(String color) {
    this.color = color;
}

public boolean isFilled() {
    return filled;
}

public void setFilled(boolean filled) {
    this.filled = filled;
}

public Date getDateCreated() {
    return dateCreated;
}

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

public abstract double getArea();

public abstract double getPerimeter();

}