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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_02) on Wed Mar 22 19:19:12 PST 2006 --><TITLE>BigNumber (Java Card API and Subsets)</TITLE><META NAME="keywords" CONTENT="javacardx.framework.math.BigNumber class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="BigNumber (Java Card API and Subsets)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/BigNumber.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java Card </b><br><font size="-1">v2.2.2</font></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../javacardx/framework/math/BCDUtil.html" title="class in javacardx.framework.math"><B>PREV CLASS</B></A> <A HREF="../../../javacardx/framework/math/ParityBit.html" title="class in javacardx.framework.math"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?javacardx/framework/math/BigNumber.html" target="_top"><B>FRAMES</B></A> <A HREF="BigNumber.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javacardx.framework.math</FONT><BR>Class BigNumber</H2><PRE><A HREF="../../../java/lang/Object.html" title="class in java.lang">java.lang.Object</A> <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>javacardx.framework.math.BigNumber</B></PRE><HR><DL><DT><PRE>public final class <B>BigNumber</B><DT>extends <A HREF="../../../java/lang/Object.html" title="class in java.lang">Object</A></DL></PRE><P>The <code>BigNumber</code> class encapsulates an unsigned number whose value is represented in internal hexadecimal format using an implementation specific maximum number of bytes. This class supports the BCD (binary coded decimal) format for I/O.<P><P><DL><DT><B>Since:</B></DT> <DD>2.2.2</DD></DL><HR><P><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Field Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static byte</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#FORMAT_BCD">FORMAT_BCD</A></B></CODE><BR> Constant to indicate a BCD (binary coded decimal) data format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static byte</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#FORMAT_HEX">FORMAT_HEX</A></B></CODE><BR> Constant to indicate a hexadecimal (simple binary) data format.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#BigNumber(short)">BigNumber</A></B>(short maxBytes)</CODE><BR> Creates a BigNumber instance with initial value 0.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#add(byte[], short, short, byte)">add</A></B>(byte[] bArray, short bOff, short bLen, byte arrayFormat)</CODE><BR> Increments the internal big number by the specified operand value</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> byte</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#compareTo(javacardx.framework.math.BigNumber)">compareTo</A></B>(<A HREF="../../../javacardx/framework/math/BigNumber.html" title="class in javacardx.framework.math">BigNumber</A> operand)</CODE><BR> Compares the internal big number against the specified operand</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> byte</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#compareTo(byte[], short, short, byte)">compareTo</A></B>(byte[] bArray, short bOff, short bLen, byte arrayFormat)</CODE><BR> Compares the internal big number against the specified operand.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#getByteLength(byte)">getByteLength</A></B>(byte arrayFormat)</CODE><BR> Returns the number of bytes required to represent the big number using the desired format</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static short</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#getMaxBytesSupported()">getMaxBytesSupported</A></B>()</CODE><BR> This method returns the byte length of the hex array that can store the biggest BigNumber supported.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#init(byte[], short, short, byte)">init</A></B>(byte[] bArray, short bOff, short bLen, byte arrayFormat)</CODE><BR> Initializes the big number using the input data</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#multiply(byte[], short, short, byte)">multiply</A></B>(byte[] bArray, short bOff, short bLen, byte arrayFormat)</CODE><BR> Multiplies the internal big number by the specified operand value</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javacardx/framework/math/BigNumber.html#reset()">reset</A></B>()</CODE><BR> Resets the big number to 0</TD></TR>⌨️ 快捷键说明
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