require "java"
require "fileutils"

FileUtils.mkdir_p("com/test")

java = <<JAVA
  package com.test;

  class MyClass {
    public static String foo() {
      return "foo";
    }
  }
JAVA

File.open("com/test/MyClass.java", "w") { |file| file << java }
`javac com/test/MyClass.java`

java_import "com.test.MyClass"

p :result => MyClass.foo