Varint64 in java code

Varint64.java

package com.yih.storage;

import com.google.common.primitives.UnsignedBytes;

import java.util.ArrayList;
import java.util.List;

public class Varint64 {

    public List<Byte> to(Long num) {
        List<Byte> bytes = new ArrayList<>();
        while (num >= 128) {
            Long j = ((num & 127) | 128);
            bytes.add(j.byteValue());
            num >>= 7;

        }
        bytes.add(num.byteValue());
        return bytes;
    }

    public Long from(List<Byte> input) {
        long ret = 0;
        for (int i = 0; i < input.size(); i++) {
            ret |= (input.get(i) & 127) << (7 * i);
            if ((input.get(i) & 128) == 0) {
                break;
            }
        }
        return ret;
    }

    public static void main(String[] argc) {

        Varint64 varint64 = new Varint64();
        List<Byte> dd = varint64.to((long) 0xCAFE);

        for (Byte d : dd) {
            System.out.println(UnsignedBytes.toString(d));
        }

        Long ret = varint64.from(dd);

        System.out.println(ret);
    }
}