## IDEA中自动生成工具
Tool -> Generate JavaDoc

## 包的说明文件
package-info.java

```java
/**
 * Provides the classes necessary to create an  
 * applet and the classes an applet uses 
 * to communicate with its applet context.
 * <p>
 * The applet framework involves two entities:
 * the applet and the applet context.
 * An applet is an embeddable window (see the
 * {@link java.awt.Panel} class) with a few extra
 * methods that the applet context can use to 
 * initialize, start, and stop the applet.
 *
 * @since 1.0
 * @see java.awt
 */
package java.lang.applet;