Currency type to use for Money
what is the best Java data type to use for currency?

You can use Money and Currency API (JSR 354). This API is expected to be part of Java 9. You can use this API in Java 7 and Java 8, provided you add appropriate dependencies to your project.

<dependency>
    <groupId>org.javamoney</groupId>
    <artifactId>moneta</artifactId>
    <version>1.0</version>
</dependency>

. Validate US phone number via regx
. Using Google's open source lib - libphoneNumber
. Using Twilio REST API

Reformat date to another format
20th Oct 2052
6th Jun 1933
26th May 1960

change to --> 2052-10-20
1933-06-06
1960-05-26

Using Javax to parse json log files

Java Code Examples for javax.json.JsonReader
The following are my examples for showing how to use javax.json.JsonReader.
These examples will be used in our system to product more good examples.