CipherInputStream object cannot be created

Question

following code didi'nt work,what to do,
i need to use this constructor itself(cannot use public)
import java.io.*;
import javax.crypto.*;
class New
public static void main(String args[]) {
FileInputStream fis = new FileInputStream("news.htm");
CipherInputStream cis = new CipherInputStream(fis);
}

Answer 1

Ths single argument constructor is protected so to use it you must create a class derived from CipherInputStrem. The java doc is
CipherInputStream
protected CipherInputStream(InputStream is)
Constructs a CipherInputStream from an InputStream without specifying a Cipher. This has the effect of constructing a CipherInputStream using a NullCipher.
Note: if the specified input stream is null, a NullPointerException may be thrown later when it is used.
The question I ask is - why do you want to create a CipherInputStream without specifying a Cipher?