import java.io.IOException;
public class MainClass {
public static void main(String args[]) throws IOException {
System.setSecurityManager(new MySecurityManager());
}
}
class MySecurityManager extends SecurityManager {
public void checkRead(String file) {
if (!(file.endsWith(".txt")) && !(file.endsWith(".java")) && !(file.endsWith(".class"))
&& !(file.startsWith("C:\\"))) {
throw new SecurityException("No Read Permission for : " + file);
}
}
}