OpenJDK for JamVM - jamvm

Question

I got system with installed jamvm onboard. Output of jamvm -version command :
java version "1.5.0"
JamVM version 2.0.0
Copyright (C) 2003-2014 Robert Lougher <rob#jamvm.org.uk>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Build information:
Execution Engine: direct-threaded interpreter with stack-caching
Compiled with: gcc 4.8.5
Boot Library Path: /usr/lib/classpath
Boot Class Path: /usr/share/jamvm/classes.zip:/usr/share/classpath/glibj.zip
Unfortunately I can't run code below:
package m;
import java.nio.file.Path;
import java.nio.file.Paths;
public class main1 {
public static void main(String[] args)
{
Path path = Paths.get("c:\\data\\myfile.txt");
System.out.println("*** start ***");
}
}
Command:
jamvm -cp . m.main1
Error:
Exception in thread "main" java.lang.NoClassDefFoundError: java/nio/file/Paths
at m.main1.main(main1.java:10)
Caused by: java.lang.ClassNotFoundException: java.nio.file.Paths not found in java.lang.ClassLoader$1{urls=[file:/opt/aaa/./], parent=null}
at java.net.URLClassLoader.findClass(URLClassLoader.java:531)
at java.lang.ClassLoader.loadClass(ClassLoader.java:341)
at java.lang.ClassLoader$1.loadClass(ClassLoader.java:1112)
at java.lang.ClassLoader.loadClass(ClassLoader.java:293)
at m.main1.main(main1.java:10)
Class java.nio.file.Path was created in java 1.7
I learn I can somehow compile OpenJDK class path. I hope it might help, but how to do that? How to setup jamvm to use OpenJDK class path?