samples/passwordgen.js

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// Simple password generator using SecureRandom + stream API

// accept optional password length from command line
var len = arguments.length? parseInt(arguments[0]) : 8;

// Java types used
var Collectors = Java.type("java.util.stream.Collectors");
var SecureRandom = Java.type("java.security.SecureRandom");

// allowed password chars
var chars =
 "!@#$%ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

// generated and print password
print(new SecureRandom().
    ints(len, 0, chars.length).
    mapToObj(function(i) chars[i]).
    collect(Collectors.joining("")));