How do I programmatically change file permissions?

Question

In Java, I\'m dynamically creating a set of files and I\'d like to change the file permissions on these files on a linux/unix file system. I\'d like to be able to execute t

Answer 1

simple java code  for change file permission in java  

   String path="D:\\file\\read.txt";
        File file=new File(path);
        if (file.exists()) {
            System.out.println("read="+file.canRead());
            System.out.println("write="+file.canWrite());
            System.out.println("Execute="+file.canExecute());
            file.setReadOnly();
        }     

Reference : how to change file permission in java