From ab3ba1c8581bf2d8df88fb6e1967302822212f02 Mon Sep 17 00:00:00 2001 From: Sualeh Fatehi Date: Thu, 16 Apr 2015 09:52:13 -0400 Subject: [PATCH] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 501c439..f732f64 100644 --- a/README.md +++ b/README.md @@ -4,7 +4,7 @@ > The goal of this project is to use publicly and freely available documentation to create a reliable Java library to provide information about credit card numbers. -All classes are immutable and thread-safe. All getter methods return non-null values. The standard `toString()` function formats data in a readable form. Validity is enforced by JUnit tests. +All classes are immutable and thread-safe. The standard `toString()` function formats data in a readable form. Validity is enforced by JUnit tests. Java 6 or newer is required. This library deliberately supports Java 6, to make it usable in Android apps. In order to be Java 8 ready, Credit Card Number depends on Stephen Colebourne's [ThreeTen backport project](https://github.com/ThreeTen/threetenbp), a port of [JSR 310](https://jcp.org/en/jsr/detail?id=310) to Java 6.