Change to executable, readable, writable

boolean setExecutable(boolean executable): A convenience method to set the owner's execute permission for this abstract pathname.
boolean setExecutable(boolean executable, boolean ownerOnly): Sets the owner's or everybody's execute permission for this abstract pathname.
boolean setReadable(boolean readable): A convenience method to set the owner's read permission for this abstract pathname.
boolean setReadable(boolean readable, boolean ownerOnly): Sets the owner's or everybody's read permission for this abstract pathname.
boolean setReadOnly(): Marks the file or directory named by this abstract pathname so that only read operations are allowed.
boolean setWritable(boolean writable): A convenience method to set the owner's write permission for this abstract pathname.
boolean setWritable(boolean writable, boolean ownerOnly): Sets the owner's or everybody's write permission for this abstract pathname.


import java.io.File;

public class Main {

  public static void main(String[] args) {
    File file = new File("c:/a.htm");
    file.setExecutable(true);
    file.setReadable(true);
    
  }
}

Mark file or directory Read Only


import java.io.File;

public class Main {
    public static void main(String[] args) {
        File file = new File("C:/data.dat");
        boolean blnMarked = file.setReadOnly();
        System.out.println("Was file marked read only ?: " + blnMarked);
        System.out.println("Is file writable ?: " + file.canWrite());
    }
}