Java tutorial
import java.io.File; public class Main { public static void main(String[] args) throws Exception { File file = new File("Writable.txt"); file.createNewFile(); file.setReadOnly(); if (file.canWrite()) { System.out.println("File is writable!"); } else { System.out.println("File is in read only mode!"); } file.setWritable(true); if (file.canWrite()) { System.out.println("File is writable!"); } else { System.out.println("File is in read only mode!"); } } }