Java应用：
Java应用程序就像是在虚拟机的支持下运行在底层操作系统上的Java程序。它也称为应用程序。图形用户界面不是执行Java应用程序所必需的，它可以在有或没有它的情况下运行。
Java小程序：
小程序是可以嵌入到网页中的Java程序。它在 Web 浏览器内运行并在客户端工作。小程序使用APPLET或OBJECT标签嵌入 HTML 页面中，并托管在 Web 服务器上。小程序用于使网站更具活力和娱乐性。
应用程序和小程序的区别：
| Java Application | Java Applet |
|---|---|
| Applications are just like a Java programs that can be execute independently without using the web browser. | Applets are small Java programs that are designed to be included with the HTML web document. They require a Java-enabled web browser for execution. |
| Application program requires a main function for its execution. | Applet does not require a main function for its execution. |
| Java application programs have the full access to the local file system and network. | Applets don’t have local disk and network access. |
| Applications can access all kinds of resources available on the system. | Applets can only access the browser specific services. They don’t have access to the local system. |
| Applications can executes the programs from the local system. | Applets cannot execute programs from the local machine. |
| An application program is needed to perform some task directly for the user. | An applet program is needed to perform small tasks or the part of it. |