C語言的無符號資料類型轉換

來源:互聯網
上載者:User

從網路中讀取C的無符號int,short,byte位元組數組,相應轉換成java的long,char,short

short anUnsignedByte = 0;
char anUnsignedShort = 0;
long anUnsignedInt = 0;
int firstByte = 0;
int secondByte = 0;
int thirdByte = 0;
int fourthByte = 0;

byte buf[] = getNetData();//如:讀網路位元組資料
int index = 0;
firstByte = (0x000000FF & ((int)buf[index]))
index++;
anUnsignedByte = (short)firstByte;

firstByte = (0x000000FF & ((int)buf[index]))
secondByte = (0x000000FF & ((int)buf[index+1]))
index = index+2;
anUnsignedShort  = (char) (firstByte << 8 | secondByte);

        firstByte = (0x000000FF & ((int)buf[index]))
        secondByte = (0x000000FF & ((int)buf[index+1]))
        thirdByte = (0x000000FF & ((int)buf[index+2]))
        fourthByte = (0x000000FF & ((int)buf[index+3]))
        index = index+4;
anUnsignedInt  = ((long) (firstByte << 24
                | secondByte << 16
                        | thirdByte << 8
                        | fourthByte))
                       & 0xFFFFFFFFL;

相關文章

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。