import javax.script.ScriptEngineManager; import javax.script.ScriptEngine; import javax.script.ScriptException; public class JavaObjectDemo { public static void main(String[] args) throws Exception { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine jsEngine; jsEngine = manager.getEngineByExtension("js"); jsEngine.eval("importPackage(javax.swing);var optionPane =JOptionPane.showMessageDialog(null, 'Hello!);"); } }