Java by API/javax.swing.filechooser/FileFilter

extends FileFilter

   <source lang="java">

import java.io.File; import javax.swing.JFileChooser; import javax.swing.filechooser.FileFilter; public class MainClass {

 public static void main(String[] a) {
   JFileChooser fileChooser = new JFileChooser(".");
   FileFilter filter1 = new ExtensionFileFilter("JPG and JPEG", new String[] { "JPG", "JPEG" });
   fileChooser.setFileFilter(filter1);
   int status = fileChooser.showOpenDialog(null);
   if (status == JFileChooser.APPROVE_OPTION) {
     File selectedFile = fileChooser.getSelectedFile();
     System.out.println(selectedFile.getParent());
     System.out.println(selectedFile.getName());
   } else if (status == JFileChooser.CANCEL_OPTION) {
     System.out.println(JFileChooser.CANCEL_OPTION);
   }
 }

} class ExtensionFileFilter extends FileFilter {

 String description;
 String extensions[];
 public ExtensionFileFilter(String description, String extension) {
   this(description, new String[] { extension });
 }
 public ExtensionFileFilter(String description, String extensions[]) {
   if (description == null) {
     this.description = extensions[0];
   } else {
     this.description = description;
   }
   this.extensions = (String[]) extensions.clone();
   toLower(this.extensions);
 }
 private void toLower(String array[]) {
   for (int i = 0, n = array.length; i < n; i++) {
     array[i] = array[i].toLowerCase();
   }
 }
 public String getDescription() {
   return description;
 }
 public boolean accept(File file) {
   if (file.isDirectory()) {
     return true;
   } else {
     String path = file.getAbsolutePath().toLowerCase();
     for (int i = 0, n = extensions.length; i < n; i++) {
       String extension = extensions[i];
       if ((path.endsWith(extension) && (path.charAt(path.length() - extension.length() - 1)) == ".")) {
         return true;
       }
     }
   }
   return false;
 }

}

      </source>