不同的结果转换成int值的字节数组时 - .NET和Java [英] different results when converting int to byte array - .NET vs Java

问题描述

我试图从Java客户端发送数据到C＃服务器有问题转换成int值的字节数组。

I am trying to send data from a java client to a c# server and having trouble converting int to byte array.

当我转换数8342与C＃使用此代码：

when i am converting the number 8342 with c# using this code:

BitConverter.GetBytes(8342)

结果是：X [4] = {150，32，0，0}

the result is: x[4] = { 150, 32, 0, 0 }

用java我使用

ByteBuffer bb = ByteBuffer.allocate(4); 
bb.putInt(8342); 
return bb.array();

和这里的结果是：X [4] = {0，0，32，-106}

and here the result is: x[4] = { 0, 0, 32, -106 }

有人能解释一下吗？我是新来的Java，这是我第一次看到字节数组负数

Can someone explain? I am new to java and this is the first time i see negative numbers in byte arrays.

推荐答案

您必须改变字节序：

 bb.order(ByteOrder.LITTLE_ENDIAN)

Java的内部存储东西大端，而.NET是Little Endian默认。

Java stores things internally as Big Endian, while .NET is Little Endian by default.

也有在签署差异， Java和.NET之间的无符号。 Java使用符号字节，C＃使用无符号。你将不得不改变，以及

Also there is difference in signed and unsigned between Java and .NET. Java uses signed bytes, C# uses unsigned. You will have to change that as well.

基本上，这就是为什么你看到-106（150 - 256）

Basically, that is why you are seeing -106 ( 150 - 256 )

您将不得不做一些像下面的实用方法：

You will have to do something like the utility method below:

public static void putUnsignedInt (ByteBuffer bb, long value)
    {
       bb.putInt ((int)(value & 0xffffffffL));
    }

请注意，值长。

这篇关于不同的结果转换成int值的字节数组时 - .NET和Java的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！