Java在java中将short转换为byte []问题

Question

public static void main(String[] args) throws Exception {
    short sh = 100;
    printBytesString(shortToBytes1(sh));
    System.out.println();
    printBytesString(shortToBytes2(sh));
}

public static byte[] shortToBytes1(short sNum) {
    byte[] bytesRet = new byte[2];
    bytesRet[0] = (byte)((sNum >> 8) & 0xFF);
    bytesRet[1] = (byte)(sNum & 0xFF);
    return bytesRet;
}

public static byte[] shortToBytes2(short sNum) {
    byte[] bytesRet = new byte[2];
    bytesRet[0] = (byte)(sNum >> 8);
    bytesRet[1] = (byte)(sNum);
    return bytesRet;
}

输出： 0000000001100100 0000000001100100

结果是一样的。那么，shortToBytes1（）和shortToBytes2（）之间的区别是什么？

Answer 1

shortToBytes1首先将字节转换为unsigned int值，而第二个则不转换。我建议使用第一个。