Java PropertyPermission .newPermissionCollection ()

public PermissionCollection newPermissionCollection()

/*from   www .  j  a va 2s.co m*/
import java.security.PermissionCollection;
import java.util.PropertyPermission;

public class Main {

  public static void main(String[] args) {
    // Build property permissions collection
    PropertyPermission permission = new PropertyPermission("java.*", "read");
    PermissionCollection permissions = permission.newPermissionCollection();
    permissions.add(permission);
    permissions.add(new PropertyPermission("java.home.*", "read,write"));

    if (permissions.implies(new PropertyPermission("java.home", "read"))) {
      System.out.println("Has permissions on " + "java.home" + " for read");
    }

    if (permissions.implies(new PropertyPermission("java.home", "write"))) {
      System.out.println("Has permissions on " + "java.home" + " for write");
    }

  }
}