bytes2str.html

来自「java类库详细讲解」· HTML 代码 · 共 143 行

HTML
143 行
字号 
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Parsing and Formatting a Byte Array into Binary, Octal, and Hexadecimal
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!--     BODY CODE  {font-family: Courier, Monospace;           font-size: 11pt}    TABLE, BODY          {font-family: Verdana, Arial, Helvetica, sans-serif;           font-size: 10pt}    PRE   {font-family: Courier, Monospace;           font-size: 10pt}    H3    {font-family: Verdana, Arial, Helvetica, sans-serif;           font-size: 11pt}    A.eglink {text-decoration: none}    A:hover.eglink {text-decoration: underline}    -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
        Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
    </TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
    &gt;
    <A HREF="../index.html">List of Packages</A>
    &gt;
    <B><A HREF="../java.math/pkg.html">java.math</A></B><font color="#666666" SIZE="-2">
        &nbsp;[6 examples]
        </font>
</DIV><P>
  <h3>
    e131.  
    Parsing and Formatting a Byte Array into Binary, Octal, and Hexadecimal</h3>

This example uses a <code>BigInteger</code> to convert a byte array to a string of
binary, octal, or hexadecimal values.


<pre>
    // Get a byte array
    byte[] bytes = new byte[]{(byte)<font color="#0066ff"><i>0x12</i></font>, (byte)<font color="#0066ff"><i>0x0F</i></font>, (byte)<font color="#0066ff"><i>0xF0</i></font>};
    
    // Create a BigInteger using the byte array
    BigInteger bi = new BigInteger(bytes);
    
    // Format to binary
    String s = bi.toString(2);      // 100100000111111110000
    
    // Format to octal
    s = bi.toString(8);             // 4407760
    
    // Format to decimal
    s = bi.toString();              // 1183728
    
    // Format to hexadecimal
    s = bi.toString(16);            // 120ff0
    if (s.length() % 2 != 0) {
        // Pad with 0
        s = "0"+s;
    }
    
    
    // Parse binary string
    bi = new BigInteger(<font color="#0066ff"><i>"100100000111111110000"</i></font>, 2);
    
    // Parse octal string
    bi = new BigInteger(<font color="#0066ff"><i>"4407760"</i></font>, 8);
    
    // Parse decimal string
    bi = new BigInteger(<font color="#0066ff"><i>"1183728"</i></font>);
    
    // Parse hexadecimal string
    bi = new BigInteger(<font color="#0066ff"><i>"120ff0"</i></font>, 16);
    
    // Get byte array
    bytes = bi.toByteArray();
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
            &nbsp;Related Examples
        </font></td>
</tr>
</table>


e126. <a class="eglink" href="AddBigInt.html?l=rel">
    Operating with Big Integer Values
</a>
<br>

e127. <a class="eglink" href="AddBigDec.html?l=rel">
    Operating with Big Decimal Values
</a>
<br>

e128. <a class="eglink" href="PrintBigDec.html?l=rel">
    Setting the Decimal Place of a Big Decimal Value
</a>
<br>

e129. <a class="eglink" href="Bits.html?l=rel">
    Performing Bitwise Operations with BigInteger
</a>
<br>

e130. <a class="eglink" href="ConvertNum2.html?l=rel">
    Parsing and Formatting a Big Integer into Binary, Octal, and Hexadecimal
</a>
<br>


<br>

<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
&copy; 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>

bytes2str.html - 源码说明

本页面展示了「java类库详细讲解」中的 bytes2str.html 源码文件，采用 HTML 编程语言编写，共 143 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与java相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?