Create README.md

Author: poralcode

README.md

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+# CSV-Validation - Java 8
+
+An example of how to reads a CSV file, validate the input data, and output the data to standard output. It performs validation on fields like **id**, **name**, **birthday**, **gender**, and **phone number** based on specific rules. The validated data is output along with error messages for invalid data. The header of the CSV file is excluded from validation.
+
+There are only two classes in this project.<br>
+[Main.java ](https://github.com/poralcode/CSV-Validation/blob/master/src/Main.java "Main.java ")- The main class that contains the logic for reading the CSV file.<br>
+[Validation.java](https://github.com/poralcode/CSV-Validation/blob/master/src/Validation.java "Validation.java") - The class that provides validation logic for the fields in a CSV file.
+
+------------
+
+
+**SAMPLE FILE INPUT:** writers.csv
+> id,name,birthday,gender,phone-number<br>
+1,Liam,02/1994/29,male,09011112222<br>
+2,Austin,1994/10/10,female,08033334444<br>
+3,,1989/01/23,female,0355556666<br>
+
+------------
+
+
+**CONSOLE OUTPUT:**
+> id,name,birthday,gender,phone-number<br>
+1,Liam,**Error format**,male,09011112222<br>
+2,Austin,1994/10/10,female,08033334444<br>
+3,**Error required**,1989/01/23,female,0355556666
+
+------------
+
+
+**VALIDATION DETAILS:**
+
+| FIELD | VALIDATION | ERROR MESSAGE | CONDITIONS |
+| ------------- | -------------- | ------------------- | ------------------ |
+| id | Mandatory, Numerical | Error Required, Error Format | Mandtory Item. Numerical values only.
+| name | Mandatory, Length limitation | Error required, Error limit over | Mandatory item. 100 characters only.
+| birthday | Mandatory, Format | Error required, Error format | Mandatory Item. yyyy/mm/dd or yyyy-mm-dd format only 
+| gender | Format | Error format | **Male** or **Female** (uppercase, lowercase, or empty data is allowed.)
+| phone-number | Mandatory, Format |Error required, Error format| Mandatory item. Format should be 000-0000-0000 or 00-0000-0000 or 000-000-0000 or 0000-00-0000 half-width number format or 00000000000 half-width number format around 10-11 characters.
+