File f = new File("f");
if (!f.createNewFile()) {
System.out.println("Can't create new file.");
return;
}
if (!f.canWrite()) {
System.out.println("Can't write new file!");
return;
}
if (!f.setReadOnly()) {
System.out.println("Grrr! Can't set file read-only.");
return;
}
if (f.canWrite()) {
System.out.println("Most immutable, captain!");
System.out.println("But it still says canWrite() after setReadOnly");
return;
} else {
System.out.println("Logical, captain!");
System.out.println("canWrite() correctly returns false after setReadOnly");
}
