Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to use FileFilter interface in lambda expression in Java?\n
A FileFilter is a functional interface from the "java.io" package. It can be used as the assignment target for a lambda expression or method reference. An instance of the FileFilter interface passed to the listFiles() method of the File class. FileFilter interface having one abstract method accept() and it tests whether or not the specified abstract pathname has included in a pathname list.
Syntax
@FunctionalInterface public interface FileFilter
Example
import java.io.File;
import java.io.FileFilter;
public class FileFilterTest {
public static void main(String[] args) {
File dir = new File("C:/Program Files/Java/jdk1.8.0_211");
File[] subDir = dir.listFiles((file) -> { // lambda expression
return file.isDirectory();
}
);
for(File file : subDir) {
System.out.println(file.getName());
}
}
}Output
bin include jre lib
Updated on: 13-Jul-2020
566 Views
Advertisements