如何将整数转换为无符号的32位大字节序字节数组 [英] How do I convert an integer to unsigned 32 bit big endian byte array

问题描述

我有一个整数，代表帧长.我想知道如何在Java中将整数转换为无符号的32位(4字节)大字节序字节数组.

I have an integer which represents a frame length. I would like to know how I can convert the integer to an unsigned 32 bit (4 bytes) big endian byte array in Java

推荐答案

在Java中，整数是带符号的，并且是大端的.单数以二进制补码格式编码.要将二进制补码转换为无符号数，只需遵循以下规则:

In Java, integer is signed and big endian. Singed number are encoded in two's complement format. To convert a two's complement number to unsigned number, just follow the following rules:

如果要使用无符号表示，只需遵循规则即可获取无符号编号.由于整数已经在big endian中，因此只需将结果分成4个字节即可.

If you want a unsigned representation, just following the rules to get the unsigned number. As the integer already in big endian, just split the result in 4 bytes.

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