FileStore isReadOnly() method in Java with Examples

The isReadOnly() method of a FileStore class is used to return true if this file store is read-only else false. A file store is called read-only if it does not support write operations or other changes to files. An IOException to be thrown if an attempt to create a file, open an existing file for writing, etc occurs.

Syntax:

public abstract String isReadOnly()

Parameters: This method accepts nothing.

Return value: This method returns true if, and only if, this file store is read-only.

Below programs illustrate the isReadOnly() method:
Program 1:

// Java program to demonstrate 
// FileStore.isReadOnly() method 
  
import java.io.IOException; 
import java.nio.file.FileStore; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws IOException 
    { 
  
        // create object of Path 
        Path path 
            = Paths.get( 
                "E:\\Tutorials\\file.txt"); 
  
        // get FileStore object 
  
        FileStore fs 
            = Files.getFileStore(path); 
  
        // print FileStore name 
        System.out.println("FileStore Name: "
                           + fs.name()); 
        // is file is readable 
        boolean isReadOnly = fs.isReadOnly(); 
        System.out.println("FileStore isReadOnly:"
                           + isReadOnly); 
    } 
} 

Output:

Program 2:

// Java program to demonstrate 
// FileStore.isReadOnly() method 
  
import java.io.IOException; 
import java.nio.file.FileStore; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws IOException 
    { 
  
        // create object of Path 
        Path path 
            = Paths.get( 
                "C:\\Movies\\001.txt"); 
  
        // get FileStore object 
  
        FileStore fs 
            = Files.getFileStore(path); 
  
        // print FileStore name 
        System.out.println("FileStore Name: "
                           + fs.name()); 
        // is file is readable 
        boolean isReadOnly = fs.isReadOnly(); 
        System.out.println("FileStore isReadOnly:"
                           + isReadOnly); 
    } 
} 

Output:

References: https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileStore.html#isReadOnly()

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