...
public static void main(String[] args) throws VnanoException {

	// Vnano Engine のインスタンスを生成
	VnanoEngine engine = new VnanoEngine();

	// 実行するスクリプトの内容を用意
	String script =

		" int sum = 0;                 " +
		" for (int i=1; i<=100; i++) { " +
		"     sum += i;                " +
		" }                            " +
		" sum;                         " ;

	// Vnano Engine でスクリプトを実行
	long result = (Long)engine.executeScript(script);
	System.out.println("result: " + result);
}