通过java.io.File类实现访问目录列表文件显示。用户输入待访问的目录路径，在文本框中使用回车键或者点击“转到”按钮，则下面的文本域中将列举出该目录下的文件名。-achieved through the java.io.File class visit directory listing documents show. User input to visit the directory path in the text box using the Enter key or click on the "transfer" button, Below is the text of jurisdictions will be listed in the catalog under the name of the file.