Pls give me a answer

Question about the task

Factory method pattern

Java Core, Level 6, Lesson 13

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Help me pls guys(

1. Take a careful look at the classes you have.
2. In separate files in the common package, create JpgReader, PngReader, and BmpReader classes that implement the ImageReader interface.
3. In a separate file in the main package, create the ImageReaderFactory class with one method.
3.1. Think about what it should be called.
3.2. Think about which modifiers this method should have.
4. This method should:
4.1. For each value in ImageTypes, return the appropriate Reader. For example, for
ImageTypes.JPG, return a JpgReader;
4.2. If an invalid argument is passed, then throw an exception:
IllegalArgumentException("Unknown image type").

Requirements:

Create a JpgReader class in the common package. It must implement the ImageReader interface.
Create a PngReader class in the common package. It must implement the ImageReader interface.
Create a BmpReader class in the common package. It must implement the ImageReader interface.
Create a public class named ImageReaderFactory.
Add a public static method getImageReader with an ImageTypes parameter to the ImageReaderFactory class.
The getImageReader method must create and return a suitable Reader.
The getImageReader method must throw an IllegalArgumentException if an invalid argument is passed.

package com.codegym.task.task16.task1631; import com.codegym.task.task16.task1631.common.ImageReader; import com.codegym.task.task16.task1631.common.ImageTypes; import com.codegym.task.task16.task1631.common.*; /* Requirements: 1. Create a JpgReader class in the common package. It must implement the ImageReader interface. 2. Create a PngReader class in the common package. It must implement the ImageReader interface. 3. Create a BmpReader class in the common package. It must implement the ImageReader interface. 4. Create a public class named ImageReaderFactory. 5. Add a public static method getImageReader with an ImageTypes parameter to the ImageReaderFactory class. 6. The getImageReader method must create and return a suitable Reader. 7. The getImageReader method must throw an IllegalArgumentException if an invalid argument is passed. */ public class Solution { public static void main(String[] args) { try{ ImageReader reader = ImageReaderFactory.getImageReader(null); }catch(Exception ex){ ex.printStackTrace(); } } }

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Ahmed

Level 23 , Amsterdam, Netherlands

4 July 2019, 15:12

1- Move the class ImageReaderFactory to the main package 2- delete "static ImageTypes it;" 3- use type instead of it in the null check 4- in the solution class delete try and catch and use the enum in your method

Shivendra Pratap Yadav

Level 20 , Mumbai, India

30 June 2019, 06:28

Put ImageReaderFactory in main package not in comman package. package com.codegym.task.task16.task1631; put it here

Denis

Level 22 , Kharkiv, Ukraine

30 June 2019, 20:22

Don't working. Program says, that: cannot find symbol static Image Types. (In ImageReaderFactory line 5, position 90)