interface_impl.js

/*
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// nashorn supports Java interface implementation
// by script using anonymous class-like syntax

var Runnable = Java.type("java.lang.Runnable");
var Thread = Java.type("java.lang.Thread");
// use anonymous class-like new syntax
var r = new Runnable() {
    run: function() {
        print("I am a runnable " + Thread.currentThread());
    }
}

r.run();

var t = new Thread(r);
t.start();
t.join();