java encryption cannnot encrypt any string?

Question

I have made an encryption and decryption class and now i want to test it. The encrypter shold take som text and encrypt it into an .txt file. But it does not work.

public class Encryption extends FilterWriter{
private static int INKREMENT = 3;

protected Encryption(Writer arg0) {
    super(arg0);
}

public void write(String str, int off, int len) throws IOException{
    String result = str.substring(0,off);
    for(int i = off; i<len+off; i++){
        result += (char) ((int) str.charAt(i)+ INKREMENT);
    }
    result += str.substring(off+len);
    out.write(result);
}
public void write(int c) throws IOException{
        out.write(c + INKREMENT);


}
public void write(char[] cbuf, int off, int len) throws IOException{
    for(int i = off; i < len + off; i++){
        cbuf[i] = (char)((int) cbuf[i] + INKREMENT);
    }
    out.write(cbuf,off,len);
}

}

My test ? I dont know what to write to get a string encrypted and saved in the text.txt file

Writer out = new Encryption(new BufferedWriter(new FileWriter("text.txt")));

Just say it - you copied random encryption code from internet and unable to use it. — d1e, Nov 04 '11 at 10:45
No i have tried to use all the ways that i know to write to an txt file but it doens not work — uthen, Nov 04 '11 at 10:55
"It does not work" contains 1 bit of information. Not a useful statement. What happens instead? — user207421, Nov 04 '11 at 11:00
this is link... [How to encrypt String in Java](http://stackoverflow.com/questions/1205135/how-to-encrypt-string-in-java) and also [How to programatically encrypt/decrypt plain text credentials in JSP?](http://stackoverflow.com/questions/308609/how-to-programatically-encrypt-decrypt-plain-text-credentials-in-jsp) happy coding :-) — Sumit Singh, Nov 04 '11 at 10:53

score 0 · Answer 1 · answered Nov 04 '11 at 11:01

0

See javax.crypto.CipherOutputStream. It's already done.

answered Nov 04 '11 at 11:01

user207421

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java encryption cannnot encrypt any string?

1 Answers1