The Java Tutorials have been written for JDK 8.Java教程是为JDK 8编写的。Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.本页中描述的示例和实践没有利用后续版本中引入的改进，并且可能使用不再可用的技术。See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.有关Java SE 9及其后续版本中更新的语言特性的摘要，请参阅Java语言更改。
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.有关所有JDK版本的新功能、增强功能以及已删除或不推荐的选项的信息，请参阅JDK发行说明。
Drag and drop, and cut, copy and paste (collectively called data transfer) are essential features of most applications. But what kind of support does Swing provide and how do you take advantage of it?
For many components, when performing a drag and drop or a cut and paste operation, Swing handles all of the work for you. For a handful of components, most of the work is done for you and all that is left for you is to plug in the details of the data import and export.
This lesson provides an introduction to the data transfer mechanism used by Swing and discusses, in particular, the TransferHandler class, the workhorse of the data transfer system.
If you are interested in using JavaFX to create your GUI, see Drag-and-Drop Feature in JavaFX Applications.