通过要求用户输入对象类型从阵列列表中删除对象

Question

我有一个形状，圆形，正方形和矩形的ArrayList。我想请用户输入r，c或s从数组列表中删除所有对象。

我尝试使用ArrayList.remove，但无法删除该类的所有对象。

try
{   
    Scanner reader = new Scanner(new File("shapes.txt"));
    while(reader.hasNextLine())
    {
        try
        {
            String line = reader.nextLine();
            String[] array = line.split(",", -1);

            if(array[0].equalsIgnoreCase("c"))
            {
                radius = Double.parseDouble(array[1]);
                Shape cir = new Circle(radius);
                shapeArray.add(cir);
                if(array.length > 2)
                {
                    throw new ExtraAttributeException("Object " + counter + " has to many attributes."
                            + " Throwing the last attribute.");
                }
            }
            if(array[0].equalsIgnoreCase("r"))
            {
                length = Double.parseDouble(array[1]);
                width = Double.parseDouble(array[2]);
                Shape rec = new Rectangle(length, width);
                shapeArray.add(rec);
                if(array.length > 3)
                {
                    throw new ExtraAttributeException("Object " + counter + " has to many attributes."
                            + " Throwing the last attribute.");
                }
            }
            if(array[0].equalsIgnoreCase("s"))
            {
                length = Double.parseDouble(array[1]);
                Shape sq = new Square(length);
                shapeArray.add(sq);
                if(array.length > 2)
                {
                    throw new ExtraAttributeException("Object " + counter + " has to many attributes."
                            + " Throwing the last attribute.");
                }
            }       

            }
            catch(ExtraAttributeException e)
            {
                System.out.println(e.getMessage());
            }   
            ++counter;
        }           
    }
    catch(FileNotFoundException e)
    {
        System.out.println("File Not Found");
    }


 System.out.println("Which type of shape do you want to remove?");
    Scanner input = new Scanner(System.in);
    String remove = input.nextLine();