Set the Read-only property of a File <p>I am trying to set the read-only property of a File, but it doesn't seem to work. Could someone please help me to understand why.</p> <p>Here is my code...</p> <pre><code>public class Main { public static void main(String[] args) { File f = new File("c:/ulala.txt"); if (!f.setReadOnly()) { System.out.println("Grrr! Can't set file read-only."); return; } } } </code></pre>