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
Set file attributes in Java
One of the file attribute that can be set is to make the file read-only. This can be done by using the method java.io.File.setReadOnly(). This method requires no parameters and it returns true if the file is set to read-only and false otherwise.
The java.io.File.canRead() and java.io.File.canWrite() methods are used to check whether the file can be read or written to respectively.
A program that demonstrates this is given as follows −
Example
import java.io.File;
public class Demo {
public static void main(String[] args) {
try {
File file = new File("demo1.txt");
file.createNewFile();
if (file.canRead())
System.out.println("Readable");
else
System.out.println("Not Readable");
if (file.canWrite())
System.out.println("Writable");
else
System.out.println("Not Writable");
file.setReadOnly();
if (file.canRead())
System.out.println("
Readable");
else
System.out.println("
Not Readable");
if (file.canWrite())
System.out.println("Writable");
else
System.out.println("Not Writable");
} catch(Exception e) {
e.printStackTrace();
}
}
}The output of the above program is as follows −
Output
Readable Writable Readable Not Writable
Updated on: 30-Jul-2019
406 Views
Advertisements