Java by API/java.io/FilenameFilter

implements FilenameFilter

   <source lang="java">

/*

* Output:
The 0 matching items in the directory, , are:
*/

import java.io.File; import java.io.FilenameFilter; import java.util.Date; public class MainClass {

 public static void main(String[] args) {
   File myDir = new File("C:/");
   // Define a filter for java source files beginning with F
   FilenameFilter select = new FileListFilter("F", "java");
   File[] contents = myDir.listFiles(select);
   if (contents != null) {
     System.out.println("\nThe " + contents.length
         + " matching items in the directory, " + myDir.getName()
         + ", are:");
     for (File file : contents) {
       System.out.println(file + " is a "
               + (file.isDirectory() ? "directory" : "file")
               + " last modified on\n"
               + new Date(file.lastModified()));
     }
   } else {
     System.out.println(myDir.getName() + " is not a directory");
   }
   return;
 }

} class FileListFilter implements FilenameFilter {

 private String name; 
 private String extension; 
 public FileListFilter(String name, String extension) {
   this.name = name;
   this.extension = extension;
 }
 public boolean accept(File directory, String filename) {
   boolean fileOK = true;
   if (name != null) {
     fileOK &= filename.startsWith(name);
   }
   if (extension != null) {
     fileOK &= filename.endsWith("." + extension);
   }
   return fileOK;
 }

}

      </source>