java - Java SplashScreen 如何工作？

Question

我需要在 java 中实现 SplashScreen，我目前正在学习 How to Create a Splash Screen但是有一段说

Fortunately, Java™ SE 6 provides a solution that allows the application to display the splash screen much earlier, even before the virtual machine starts. A Java application launcher is able to decode an image and display it in a simple non-decorated window.

如果 SplashScreen 是一个 java 类，即使虚拟机启动，java 怎么可能运行 SplashScreen？

Answer 1

如果您在 jar MANIFEST 文件中定义启动画面，它会在 Java VM 启动之前加载并显示本地代码。在这种情况下无需加载类。稍后，您可以获取 SplashScreen 实例来编辑和/或关闭它。

list 条目:

SplashScreen-Image: images/splash.gif

或命令行选项:

-splash:images/nnn.gif

Java Platform, Standard Edition (Java SE, formerly known as J2SE) version 6, provides a solution that allows the application to show the splash screen much earlier, even before the virtual machine starts. Now, a Java application launcher is able to decode an image and display it in a simple nondecorated window.

来源: http://www.oracle.com/technetwork/articles/javase/splashscreen-135938.html