Java Data Type Tutorial - Java SecurityManager .checkRead (FileDescriptor fd)

Syntax

SecurityManager.checkRead(FileDescriptor fd) has the following syntax.

public void checkRead(FileDescriptor fd)

Example

In the following code shows how to use SecurityManager.checkRead(FileDescriptor fd) method.

/*from w w w .j  ava2s . com*/
import java.io.FileDescriptor;

public class Main extends SecurityManager {

   public static void main(String[] args) {
      System.setProperty("java.security.policy", "file:/C:/java.policy");

      Main sm = new Main();

      System.setSecurityManager(sm);

      FileDescriptor fd = new FileDescriptor();
      sm.checkRead(fd);

      System.out.println("Allowed!");
   }
}