Newton keystore java is newton SDK for Java and Android which is forked from bitcoinj.
Add the relevant dependency to your project:
Java 8:
<dependency>
<groupId>org.newtondeveloper</groupId>
<artifactId>newpay-keystore</artifactId>
<version>0.0.1</version>
<type>pom</type>
</dependency>
Java 8:
implementation 'org.newtondeveloper:newpay-keystore:0.0.1'
Changed Bitcoin seed to Nist256p1 seed.