Read only file from java programing

Read only file from java programing source code

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package javasample;
import java.io.*;
/**
 *
 * @author rajesh kumar shukla
 */
public class ReadOnlyfile {
  public static void main(String[] a) throws IOException {
       
         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");
         }
     }
}