at the same time to a

buffer < 03 01 00 00 02 00 00 >

encrypt. The result of
java and c is

CA 66 C4 5D 90 E7 3001

nodejs is

6f 61 f8 95 ab ba aa 90

what is the reason why it is different?

java code address ideone.com/V5Nzos" rel=" nofollow noreferrer "> https://ideone.com/V5Nzos

import java.nio.ByteBuffer;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

class Test {  
    public static void main(String[] args) {  

        try {

            byte[] bs = {
            (byte)0x03, (byte)0x01, (byte)0x00, (byte)0x00, 
            (byte)0x02, (byte)0x00, (byte)0x00, (byte)0x00
            };
            ByteBuffer buff = ByteBuffer.wrap(bs);
            Cipher instance = Cipher.getInstance("RC4");
            instance.init(Cipher.DECRYPT_MODE, new SecretKeySpec(("c2eWxyNe5c4G9GUHMQECzcUEWUK8MWkk" + "48LoIDEv8EQOrmwPirikDa3iUaickMSq").getBytes(), "RC4"));
            instance.update(buff.array(), 0, 8, buff.array(), 0);
            byte[] array = buff.array();
            for (int j=0; j<array.length; jPP) {
                System.out.format("%02X ", array[j]);
            }
            System.out.println();
            // :CA 66 C4 5D 90 E7 30 01
        
            
        }catch (Throwable th) {
            System.out.println(th);
            System.exit(0);
        }
    }


}

nodejs code address
ideone.com/XQVhRM" rel=" nofollow noreferrer "> https://ideone.com/XQVhRM

var crypto = require("crypto");
//en
function cipher (buf) {
    var rc4Key = "c2eWxyNe5c4G9GUHMQECzcUEWUK8MWkk"
    var cipher = crypto.createCipher("rc4", (rc4Key+"48LoIDEv8EQOrmwPirikDa3iUaickMSq"),1);
    var cryptedBuffers = [cipher.update(buf)];
    cryptedBuffers.push(cipher.final());
    var crypted = Buffer.concat(cryptedBuffers);
    return crypted;
};
var buf1 = Buffer.from([
    0x03, 0x01, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00
]);
 
console.log(cipher((buf1)));
//<Buffer 6f 61 f8 95 ab ba aa 90>