How to Create a file and change its attribute to readonly in java

import java.io.File;
import java.io.IOException;

public class FileAttributesDemo {

public static void main(String[] args) throws IOException {
// Create a new file, by default canWrite=true, readonly=false
File file = new File("test.txt");
if (file.exists()) {
file.delete();
}
file.createNewFile();
System.out.println("Before. canWrite?" + file.canWrite());

// set to read-only, atau canWrite = false */
file.setWritable(false);
System.out.println("After. canWrite?" + file.canWrite());
}
}