Change to executable, readable, writable « File « File Stream

Return	Method	Summary
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);
    
  }
}


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());
    }
}