import java.io.File;
import java.io.FilenameFilter;


public class A {

    public static void main(String[] args) {
         File file = new File("E:/workspace/aaa/src");

         File[] listFiles = file.listFiles(new MyFileter());

         for(File f : listFiles){
             System.out.println(f.getName());
         }
    }

    static
 
 class MyFileter implements FilenameFilter {

        @Override
        public boolean accept(File file, String filename) {
            if (filename != null && filename.toLowerCase().endsWith(".java")) {
                return true;
            } else {
                return false;
            }
        }

    }
}