转换字节在Java二进制

转换字节在Java二进制

本文介绍了转换字节在Java二进制的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想转换一个字节值至二值进行数据传输。基本上,我在一个字节数组,其中10101100是一个单字节发送像二进制的AC(10101100)的值。我希望能够获得这个字节,并将其转换回10101100.截至目前,我没有成功可言真的不知道从哪里开始。任何帮助将是巨大的。

修改:对不起,我没有意识到,我忘了补充具体细节的所有困惑

基本上,我需要使用一个字节数组,通过套接字连接发送二进制值。我能做到这一点,但我不知道如何转换的价值观,使他们正确显示。下面是一个例子:

我需要发送的十六进制值ACDE48并能够跨preT回来。根据文档,我必须将它转换为二进制的方式如下:字节[] B = {} 10101100,11011110,01001000,其中阵列中的每个地方可以容纳2的值。然后,我需要将这些值转换回来后,他们被发送和接收。我不知道如何去这样做。


解决方案

 字符串toBinary(字节[]字节)
{
    StringBuilder的SB =新的StringBuilder(bytes.length * Byte.SIZE);
    的for(int i = 0; I< Byte.SIZE * bytes.length;我++)
        sb.append((字节[I / Byte.SIZE]所述;&下;则i%Byte.SIZE&放大器; 0x80的)== 0'0':'1');
    返回sb.toString();
}字节[] fromBinary(String s)将
{
    INT SLEN = s.length();
    字节[] = toReturn新的字节[(SLEN + Byte.SIZE - 1)/ Byte.SIZE]
    焦炭℃;
    的for(int i = 0; I< SLEN;我++)
        如果((C = s.charAt(ⅰ))=='1')
            toReturn [I / Byte.SIZE] =(字节)(toReturn [I / Byte.SIZE] |(0x80的>>>(ⅰ%Byte.SIZE)));
        否则如果(C!='0')
            抛出新抛出:IllegalArgumentException();
    返回toReturn;
}

有一些简单的方法也处理这个问题(假设大端)。

 的Integer.parseInt(十六进制,16);
的Integer.parseInt(二进制,2);

  Integer.toHexString(字节).subString((Integer.SIZE  -  Byte.SIZE)/ 4);
Integer.toBinaryString(字节).substring(Integer.SIZE - Byte.SIZE);

I am trying to convert a byte value to binary for data transfer. Basically, I am sending a value like "AC" in binary ("10101100") in a byte array where "10101100" is a single byte. I want to be able to receive this byte and convert it back into "10101100." As of now I have no success at all dont really know where to begin. Any help would be great.

edit: sorry for all the confusion I didnt realize that I forgot to add specific details.

Basically I need to use a byte array to send binary values over a socket connection. I can do that but I dont know how to convert the values and make them appear correctly. Here is an example:

I need to send the hex values ACDE48 and be able to interpret it back. According to documentation, I must convert it to binary in the following way: byte [] b={10101100,11011110,01001000}, where each place in the array can hold 2 values. I then need to convert these values back after they are sent and received. I am not sure how to go about doing this.

解决方案
String toBinary( byte[] bytes )
{
    StringBuilder sb = new StringBuilder(bytes.length * Byte.SIZE);
    for( int i = 0; i < Byte.SIZE * bytes.length; i++ )
        sb.append((bytes[i / Byte.SIZE] << i % Byte.SIZE & 0x80) == 0 ? '0' : '1');
    return sb.toString();
}

byte[] fromBinary( String s )
{
    int sLen = s.length();
    byte[] toReturn = new byte[(sLen + Byte.SIZE - 1) / Byte.SIZE];
    char c;
    for( int i = 0; i < sLen; i++ )
        if( (c = s.charAt(i)) == '1' )
            toReturn[i / Byte.SIZE] = (byte) (toReturn[i / Byte.SIZE] | (0x80 >>> (i % Byte.SIZE)));
        else if ( c != '0' )
            throw new IllegalArgumentException();
    return toReturn;
}

There are some simpler ways to handle this also (assumes big endian).

Integer.parseInt(hex, 16);
Integer.parseInt(binary, 2);

and

Integer.toHexString(byte).subString((Integer.SIZE - Byte.SIZE) / 4);
Integer.toBinaryString(byte).substring(Integer.SIZE - Byte.SIZE);

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08-15 18:10