OpenJDK for 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 <[email protected]>

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?