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Byte (Java 2 Platform SE v1.4.2)
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java.lang</FONT>
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Class Byte</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"><A HREF="../../java/lang/Number.html" title="class in java.lang">java.lang.Number</A>
<IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>java.lang.Byte</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../java/lang/Comparable.html" title="interface in java.lang">Comparable</A>, <A HREF="../../java/io/Serializable.html" title="interface in java.io">Serializable</A></DD>
</DL>
<HR>
<DL>
<DT>public final class <B>Byte</B><DT>extends <A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A><DT>implements <A HREF="../../java/lang/Comparable.html" title="interface in java.lang">Comparable</A></DL> <P>
The <code>Byte</code> class wraps a value of primitive type
<code>byte</code> in an object. An object of type
<code>Byte</code> contains a single field whose type is
<code>byte</code>.
Byte类以对象的形式对简单类型byte进行包装，一个Byte类型的对象包含一个类型为byte的域。 <p> In addition, this class provides several methods for converting a
<code>byte</code> to a <code>String</code> and a <code>String</code>
to a <code>byte</code>, as well as other constants and methods
useful when dealing with a <code>byte</code>.
而且，该类提供了很多将byte转化成String或者String转化成byte的方法，在处理byte时其他的一些常量和方法同样有用。
<P> <P>
<DL>
<DT><B>Since:</B></DT>
<DD>JDK1.1</DD>
<DT><B>See Also:</B><DD><A HREF="../../java/lang/Number.html" title="class in java.lang"><CODE>Number</CODE></A>,
<A HREF="../../serialized-form.html#java.lang.Byte">Serialized Form</A></DL>
<HR> <P>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#MAX_VALUE">MAX_VALUE</A></B></CODE> <BR>
A constant holding the maximum value a <code>byte</code> can
have, 2<sup>7</sup>-1.常量，表示byte的最大值2<sup>7</sup>-1。</TD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#MIN_VALUE">MIN_VALUE</A></B></CODE><BR>
A constant holding the minimum value a <code>byte</code> can
have, -2<sup>7</sup>.常量，表示byte的最小值-2<sup>7</sup>-1。</TD>
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<CODE>static <A HREF="../../java/lang/Class.html" title="class in java.lang">Class</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#TYPE">TYPE</A></B></CODE> <BR>
The <code>Class</code> instance representing the primitive type
<code>byte</code>.表示简单类型byte的Class实例。</TD>
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<TD><CODE><B><A HREF="../../java/lang/Byte.html#Byte(byte)">Byte</A></B>(byte value)</CODE> <BR>
Constructs a newly allocated <code>Byte</code> object that
represents the specified <code>byte</code> value.创建一个表示指定byte值的Byte对象。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../java/lang/Byte.html#Byte(java.lang.String)">Byte</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)</CODE> <BR>
Constructs a newly allocated <code>Byte</code> object that
represents the <code>byte</code> value indicated by the
<code>String</code> parameter.创建一个由String参数表示的byte值的Byte对象。</TD>
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<CODE> byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#byteValue()">byteValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as a <code>byte</code>.以byte类型返回该Byte的值。</TD>
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<TD ALIGN="right" VALIG
="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#compareTo(java.lang.Byte)">compareTo</A></B>(<A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A> anotherByte)</CODE> <BR>
Compares two <code>Byte</code> objects numerically.比较两个Byte对象数字上是否相等。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#compareTo(java.lang.Object)">compareTo</A></B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A> o)</CODE> <BR>
Compares this <code>Byte</code> object to another object.将该Byte对象和另一个对象比较。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#decode(java.lang.String)">decode</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> nm)</CODE> <BR>
Decodes a <code>String</code> into a <code>Byte</code>.将String类型转换成Byte类型。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#doubleValue()">doubleValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as a
<code>double</code>.以double类型返回该Byte值。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#equals(java.lang.Object)">equals</A></B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A> obj)</CODE> <BR>
Compares this object to the specified object.将该对象与指定对象相比较。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#floatValue()">floatValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as a
<code>float</code>.以float类型返回该Byte值。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#hashCode()">hashCode</A></B>()</CODE> <BR>
Returns a hash code for this <code>Byte</code>.返回该Byte的hash码。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#intValue()">intValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as an
<code>int</code>.以int类型返回该Byte值。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#longValue()">longValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as a
<code>long</code>.以long类型返回该Byte值。</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="../../java/lang/Byte.html#parseByte(java.lang.String)">parseByte</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)</CODE> <BR>
Parses the string argument as a signed decimal
<code>byte</code>.将字符串参数作为带符号的十进制byte值进行转换。</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="../../java/lang/Byte.html#parseByte(java.lang.String, int)">parseByte</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
int radix)</CODE> <BR>
Parses the string argument as a signed <code>byte</code> in the
radix specified by the second argument.将字符串参数作为带符号的byte值进行转换，进制由第二个参数指定。</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="../../java/lang/Byte.html#shortValue()">shortValue</A></B>()</CODE> <BR>
Returns the value of this <code>Byte</code> as a
<code>short</code>.以long类型返回该Byte值。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../java/lang/String.html" title="class in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#toString()">toString</A></B>()</CODE> <BR>
Returns a <code>String</code> object representing this
<code>Byte</code>'s value.返回该Byte值的字符串形式。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#toString(byte)">toString</A></B>(byte b)</CODE> <BR>
Returns a new <code>String</code> object representing the
specified <code>byte</code>.返回指定byte值的字符串形式。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#valueOf(java.lang.String)">valueOf</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)</CODE> <BR>
Returns a <code>Byte</code> object holding the value
given by the specified <code>String</code>.返回一Byte对象，值由指定的String参数确定。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Byte.html#valueOf(java.lang.String, int)">valueOf</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
int radix)</CODE> <BR>
Returns a <code>Byte</code> object holding the value
extracted from the specified <code>String</code> when parsed
with the radix given by the second argument.返回一Byte对象，值由指定的String参数确定，进制由第二个参数确定。</TD>
</TR>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../java/lang/Object.html#finalize()">finalize</A>, <A HREF="../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD>
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<P> <!-- ============ FIELD DETAIL =========== --> <A NAME="field_detail"><!-- --></A>
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<B>Field Detail</B></FONT></TD>
</TR>
</TABLE> <A NAME="MIN_VALUE"><!-- --></A><H3>
MIN_VALUE</H3>
<PRE>
public static final byte <B>MIN_VALUE</B></PRE>
<DL>
<DD>A constant holding the minimum value a <code>byte</code> can
have, -2<sup>7</sup>.常量，表示byte的最小值-2<sup>7</sup>.。
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../constant-values.html#java.lang.Byte.MIN_VALUE">Constant Field Values</A></DL>
</DL>
<HR> <A NAME="MAX_VALUE"><!-- --></A><H3>
MAX_VALUE</H3>
<PRE>
public static final byte <B>MAX_VALUE</B></PRE>
<DL>
<DD>A constant holding the maximum value a <code>byte</code> can
have, 2<sup>7</sup>-1.常量，表示byte的最大值2<sup>7</sup>-1。
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../constant-values.html#java.lang.Byte.MAX_VALUE">Constant Field Values</A></DL>
</DL>
<HR> <A NAME="TYPE"><!-- --></A><H3>
TYPE</H3>
<PRE>
public static final <A HREF="../../java/lang/Class.html" title="class in java.lang">Class</A> <B>TYPE</B></PRE>
<DL>
<DD>The <code>Class</code> instance representing the primitive type
<code>byte</code>.表示简单类型byte的Class实例。
<P>
<DL>
</DL>
</DL> <!-- ========= CONSTRUCTOR DETAIL ======== --> <A NAME="constructor_detail"><!-- --></A>
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</TR>
</TABLE> <A NAME="Byte(byte)"><!-- --></A><H3>
Byte</H3>
<PRE>
public <B>Byte</B>(byte value)</PRE>
<DL>
<DD>Constructs a newly allocated <code>Byte</code> object that
represents the specified <code>byte</code> value.创建一个表示指定byte值的Byte对象。
<P>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the value to be represented by the
<code>Byte</code>.由Byte表示的值。</DL>
<HR> <A NAME="Byte(java.lang.String)"><!-- --></A><H3>
Byte</H3>
<PRE>
public <B>Byte</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Constructs a newly allocated <code>Byte</code> object that
represents the <code>byte</code> value indicated by the
<code>String</code> parameter. The string is converted to a
<code>byte</code> value in exactly the manner used by the
<code>parseByte</code> method for radix 10.
创建一个由String参数表示的byte值的Byte对象，string被转换成byte值，相当于进制为10的方法parseByte。
<P>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the <code>String</code> to be converted to a
<code>Byte</code>将被转换成Byte的String
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - If the <code>String</code>
does not contain a parsable <code>byte</code>.如果该String不能转换成byte<DT><B>See Also:</B><DD><A HREF="../../java/lang/Byte.html#parseByte(java.lang.String, int)"><CODE>parseByte(java.lang.String, int)</CODE></A></DL> <!-- ============ METHOD DETAIL ========== --> <A NAME="method_detail"><!-- --></A>
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</TABLE> <A NAME="toString(byte)"><!-- --></A><H3>
toString</H3>
<PRE>
public static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A> <B>toString</B>(byte b)</PRE>
<DL>
<DD>Returns a new <code>String</code> object representing the
specified <code>byte</code>. The radix is assumed to be 10.
返回指定byte值的字符串形式，进制假定为10。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>b</CODE> - the <code>byte</code> to be converted被转换的byte
<DT><B>Returns:</B><DD>the string representation of the specified <code>byte</code>表示指定byte的字符串<DT><B>See Also:</B><DD><A HREF="../../java/lang/Integer.html#toString(int)"><CODE>Integer.toString(int)</CODE></A></DL>
</DD>
</DL>
<HR> <A NAME="parseByte(java.lang.String)"><!-- --></A><H3>
parseByte</H3>
<PRE>
public static byte <B>parseByte</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Parses the string argument as a signed decimal
<code>byte</code>. The characters in the string must all be
decimal digits, except that the first character may be an ASCII
minus sign <code>'-'</code> (<code>'\u002D'</code>) to
indicate a negative value. The resulting <code>byte</code> value is
returned, exactly as if the argument and the radix 10 were
given as arguments to the <A HREF="../../java/lang/Byte.html#parseByte(java.lang.String, int)"><CODE>parseByte(java.lang.String,
int)</CODE></A> method.
将字符串参数作为带符号的十进制byte值进行转换，字符串中的字符必须都是十进制数字，除了第一个字符可以为ACSII 减号‘-’('\u002D')
来表示负数。以byte值作为结果返回，相当于方法parseByte(java.lang.String,int)，进制给定为10。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - a <code>String</code> containing the
<code>byte</code> representation to be parsed被用来转换成byte的String
<DT><B>Returns:</B><DD>the <code>byte</code> value represented by the
argument in decimal参数表示的byte值（十进制）
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - if the the string does not
contain a parsable <code>byte</code>.如果字符串不能转换成byte值</DL>
</DD>
</DL>
<HR> <A NAME="parseByte(java.lang.String, int)"><!-- --></A><H3>
parseByte</H3>
<PRE>
public static byte <B>parseByte</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
int radix)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Parses the string argument as a signed <code>byte</code> in the
radix specified by the second argument. The characters in the
string must all be digits, of the specified radix (as
determined by whether <A HREF="../../java/lang/Character.html#digit(char, int)"><CODE>Character.digit(char,
int)</CODE></A> returns a nonnegative value) except that the first
character may be an ASCII minus sign <code>'-'</code>
(<code>'\u002D'</code>) to indicate a negative value. The
resulting <code>byte</code> value is returned.
将字符串参数作为带符号的byte值进行转换，进制由第二个参数确定。字符串中的字符必须都是十进制数字
（可以由Character.digit(char,int)是否返回非负数来确定），
除了第一个字符可以为ACSII 减号‘-’('\u002D') 来表示负数，结果返回byte值。
<p>
An exception of type <code>NumberFormatException</code> is
thrown if any of the following situations occurs:
如果下列情形之一发生时抛出NumberFormatException：
<ul>
<li> The first argument is <code>null</code> or is a string of
length zero.第一个参数为null，或长度为0。 <li> The radix is either smaller than <A HREF="../../java/lang/Character.html#MIN_RADIX"><CODE>Character.MIN_RADIX</CODE></A> or larger than <A HREF="../../java/lang/Character.html#MAX_RADIX"><CODE>Character.MAX_RADIX</CODE></A>.
进制比Character.MIN_RADIX小或者比Character.MAX_RADIX大。
<li> Any character of the string is not a digit of the specified
radix, except that the first character may be a minus sign
<code>'-'</code> (<code>'\u002D'</code>) provided that the
string is longer than length 1.
字符串中的任意字符不是指定进制的数字，长度大于1的字符串第一个字符可以为减号‘-’。 <li> The value represented by the string is not a value of type
<code>byte</code>.字符串表示的值不是一个byte类型的值。
</ul>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the <code>String</code> containing the
<code>byte</code>
representation to be parsed被用来转换成byte的String <DD><CODE>radix</CODE> - the radix to be used while parsing <code>s</code>转换s时使用的进制
<DT><B>Returns:</B><DD>the <code>byte</code> value represented by the string
argument in the specified radix 表示指定进制字符串的byte值
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - If the string does
not contain a parsable <code>byte</code>.如果该字符串不能转换成byte。</DL>
</DD>
</DL>
<HR> <A NAME="valueOf(java.lang.String, int)"><!-- --></A><H3>
valueOf</H3>
<PRE>
public static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A> <B>valueOf</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
int radix)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Returns a <code>Byte</code> object holding the value
extracted from the specified <code>String</code> when parsed
with the radix given by the second argument. The first argument
is interpreted as representing a signed <code>byte</code> in
the radix specified by the second argument, exactly as if the
argument were given to the <A HREF="../../java/lang/Byte.html#parseByte(java.lang.String, int)"><CODE>parseByte(java.lang.String,
int)</CODE></A> method. The result is a <code>Byte</code> object that
represents the <code>byte</code> value specified by the string.
返回一Byte对象，值由指定的String参数确定，进制由第二个参数确定。第一个参数
用来表示指定进制的带符号的值，进制由第二个参数指定，相当于方法parseByte(java.lang.String, int)，返回
一Byte对象，表示的byte值由字符串指定。
<p> In other words, this method returns a <code>Byte</code> object
equal to the value of:
换言之，该方法返回等于该值的Byte对象： <blockquote><code>
new Byte(Byte.parseByte(s, radix))
</code></blockquote>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the string to be parsed 用来转换的字符串
<DD><CODE>radix</CODE> - the radix to be used in interpreting <code>s</code>用来说明s的进制
<DT><B>Returns:</B><DD>a <code>Byte</code> object holding the value
represented by the string argument in the
specified radix.表示指定进制字符串值的Byte对象。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - If the <code>String</code> does
not contain a parsable <code>byte</code>.如果该字符串不能转换成byte。</DL>
</DD>
</DL>
<HR> <A NAME="valueOf(java.lang.String)"><!-- --></A><H3>
valueOf</H3>
<PRE>
public static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A> <B>valueOf</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Returns a <code>Byte</code> object holding the value
given by the specified <code>String</code>. The argument is
interpreted as representing a signed decimal <code>byte</code>,
exactly as if the argument were given to the <A HREF="../../java/lang/Byte.html#parseByte(java.lang.String)"><CODE>parseByte(java.lang.String)</CODE></A> method. The result is a
<code>Byte</code> object that represents the <code>byte</code>
value specified by the string.
返回一Byte对象，值由指定的String参数确定。第一个参数
用来表示指定十进制的带符号的值，进制由第二个参数指定，相当于方法parseByte(java.lang.String)，结果返回
一Byte对象，表示的byte值由字符串指定。
<p> In other words, this method
returns a <code>Byte</code> object equal to the value of:
换言之，该方法返回等于该值的Byte对象： <blockquote><code>
new Byte(Byte.parseByte(s))
</code></blockquote>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the string to be parsed用来转换的字符串
<DT><B>Returns:</B><DD>a <code>Byte</code> object holding the value
represented by the string argument表示指定字符串值的Byte对象。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - If the <code>String</code> does
not contain a parsable <code>byte</code>.如果该字符串不能转换成byte。</DL>
</DD>
</DL>
<HR> <A NAME="decode(java.lang.String)"><!-- --></A><H3>
decode</H3>
<PRE>
public static <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A> <B>decode</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> nm)
throws <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></PRE>
<DL>
<DD>Decodes a <code>String</code> into a <code>Byte</code>.
Accepts decimal, hexadecimal, and octal numbers given by
the following grammar:
将String转换成Byte。允许符合下列语法的十进制、十六进制和八进制的数字。 <blockquote>
<dl>
<dt><i>DecodableString:</i>
<dd><i>Sign<sub>opt</sub> DecimalNumeral</i>
<dd><i>Sign<sub>opt</sub></i> <code>0x</code> <i>HexDigits</i>
<dd><i>Sign<sub>opt</sub></i> <code>0X</code> <i>HexDigits</i>
<dd><i>Sign<sub>opt</sub></i> <code>#</code> <i>HexDigits</i>
<dd><i>Sign<sub>opt</sub></i> <code>0</code> <i>OctalDigits</i>
<p>
<dt><i>Sign:</i>
<dd><code>-</code>
</dl>
</blockquote> <i>DecimalNumeral</i>, <i>HexDigits</i>, and <i>OctalDigits</i>
are defined in <a href="http://java.sun.com/docs/books/jls/second_edition/html/lexical.doc.html#48282">§3.10.1</a>
of the <a href="http://java.sun.com/docs/books/jls/html/">Java
Language Specification</a>.
十进制、十六进制和八进制数字在Java语言规范3.10.1中定义。
<p>
The sequence of characters following an (optional) negative
sign and/or radix specifier ("<code>0x</code>",
"<code>0X</code>", "<code>#</code>", or
leading zero) is parsed as by the <code>Byte.parseByte</code>
method with the indicated radix (10, 16, or 8). This sequence
of characters must represent a positive value or a <A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang"><CODE>NumberFormatException</CODE></A> will be thrown. The result is negated
if first character of the specified <code>String</code> is the
minus sign. No whitespace characters are permitted in the
<code>String</code>.字符串序列以负号（可选）或进制标识("0x", "0X", "#", 或者0开头，用Byte.parseByte方法按照指定的
进制（10，16或者8）进行转换。该字符串序列应当表示正数否则抛出NumberFormatException，如果指定的String以‘-’开头，结果为负。String中不允许空白字符。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>nm</CODE> - the <code>String</code> to decode. 用来转换的String。
<DT><B>Returns:</B><DD>a <code>Byte</code> object holding the <code>byte</code>
value represented by <code>nm</code> 由nm表示byte值的Byte对象
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NumberFormatException.html" title="class in java.lang">NumberFormatException</A></CODE> - if the <code>String</code> does not
contain a parsable <code>byte</code>.如果该字符串不能转换成byte。<DT><B>See Also:</B><DD><A HREF="../../java/lang/Byte.html#parseByte(java.lang.String, int)"><CODE>parseByte(java.lang.String, int)</CODE></A></DL>
</DD>
</DL>
<HR> <A NAME="byteValue()"><!-- --></A><H3>
byteValue</H3>
<PRE>
public byte <B>byteValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as a
<code>byte</code>.以byte类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Number.html#byteValue()">byteValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>byte</code>.在该对象转换成byte类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="shortValue()"><!-- --></A><H3>
shortValue</H3>
<PRE>
public short <B>shortValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as a
<code>short</code>.以short类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Number.html#shortValue()">shortValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>short</code>.在该对象转换成short类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="intValue()"><!-- --></A><H3>
intValue</H3>
<PRE>
public int <B>intValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as an
<code>int</code>.以int类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../java/lang/Number.html#intValue()">intValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>int</code>.在该对象转换成int类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="longValue()"><!-- --></A><H3>
longValue</H3>
<PRE>
public long <B>longValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as a
<code>long</code>.以long类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../java/lang/Number.html#longValue()">longValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>long</code>.在该对象转换成long类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="floatValue()"><!-- --></A><H3>
floatValue</H3>
<PRE>
public float <B>floatValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as a
<code>float</code>.以float类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../java/lang/Number.html#floatValue()">floatValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>float</code>.在该对象转换成float类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="doubleValue()"><!-- --></A><H3>
doubleValue</H3>
<PRE>
public double <B>doubleValue</B>()</PRE>
<DL>
<DD>Returns the value of this <code>Byte</code> as a
<code>double</code>.以double类型返回该Byte值。
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../java/lang/Number.html#doubleValue()">doubleValue</A></CODE> in class <CODE><A HREF="../../java/lang/Number.html" title="class in java.lang">Number</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>the numeric value represented by this object after conversion
to type <code>double</code>.在该对象转换成double类型后表示的数值。</DL>
</DD>
</DL>
<HR> <A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="../../java/lang/String.html" title="class in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a <code>String</code> object representing this
<code>Byte</code>'s value. The value is converted to signed
decimal representation and returned as a string, exactly as if
the <code>byte</code> value were given as an argument to the
<A HREF="../../java/lang/Byte.html#toString(byte)"><CODE>toString(byte)</CODE></A> method.
返回该Byte值的字符串形式。该值转换成带符号的十进制形式，以字符串返回。和toString(byte)方法类似，byte值作为参数给出。
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Object.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>a string representation of the value of this object in
base 10.该对象以10为基的字符串形式。</DL>
</DD>
</DL>
<HR> <A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns a hash code for this <code>Byte</code>.返回该byte的hash码。
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Object.html#hashCode()">hashCode</A></CODE> in class <CODE><A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL> <DT><B>Returns:</B><DD>a hash code value for this object.该对象的hash码值。<DT><B>See Also:</B><DD><A HREF="../../java/lang/Object.html#equals(java.lang.Object)"><CODE>Object.equals(java.lang.Object)</CODE></A>,
<A HREF="../../java/util/Hashtable.html" title="class in java.util"><CODE>Hashtable</CODE></A></DL>
</DD>
</DL>
<HR> <A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A> obj)</PRE>
<DL>
<DD>Compares this object to the specified object. The result is
<code>true</code> if and only if the argument is not
<code>null</code> and is a <code>Byte</code> object that
contains the same <code>byte</code> value as this object.
将该对象与指定对象相比较。只有当参数不为null，是Byte对象，且值与该对象相等时结果为true。
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Object.html#equals(java.lang.Object)">equals</A></CODE> in class <CODE><A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>obj</CODE> - the object to compare with用来比较的对象
<DT><B>Returns:</B><DD><code>true</code> if the objects are the same;
<code>false</code> otherwise.如果对象相同，返回true，否则为false。<DT><B>See Also:</B><DD><A HREF="../../java/lang/Object.html#hashCode()"><CODE>Object.hashCode()</CODE></A>,
<A HREF="../../java/util/Hashtable.html" title="class in java.util"><CODE>Hashtable</CODE></A></DL>
</DD>
</DL>
<HR> <A NAME="compareTo(java.lang.Byte)"><!-- --></A><H3>
compareTo</H3>
<PRE>
public int <B>compareTo</B>(<A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A> anotherByte)</PRE>
<DL>
<DD>Compares two <code>Byte</code> objects numerically.比较两个Byte对象数字上是否相等。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>anotherByte</CODE> - the <code>Byte</code> to be compared.用来比较的Byte
<DT><B>Returns:</B><DD>the value <code>0</code> if this <code>Byte</code> is
equal to the argument <code>Byte</code>; a value less than
<code>0</code> if this <code>Byte</code> is numerically less
than the argument <code>Byte</code>; and a value greater than
<code>0</code> if this <code>Byte</code> is numerically
greater than the argument <code>Byte</code> (signed
comparison).如果该Byte对象等于Byte参数，返回0，如果小于Byte参数，返回小于0的
数，如果大于Byte参数，返回大于0的数（有符号比较）。<DT><B>Since:</B></DT>
<DD>1.2</DD>
</DL>
</DD>
</DL>
<HR> <A NAME="compareTo(java.lang.Object)"><!-- --></A><H3>
compareTo</H3>
<PRE>
public int <B>compareTo</B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A> o)</PRE>
<DL>
<DD>Compares this <code>Byte</code> object to another object. If the
object is a <code>Byte</code>, this function behaves like
<code>compareTo(Byte)</code>. Otherwise, it throws a
<code>ClassCastException</code> (as <code>Byte</code> objects
are only comparable to other <code>Byte</code> objects).
将该Byte对象和另一个对象比较。如果该对象为Byte类型，方法按compareTo(Byte)执行，否则
抛出ClassCastException（因为Byte对象只能与其他Byte对象比较）。
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../java/lang/Comparable.html#compareTo(java.lang.Object)">compareTo</A></CODE> in interface <CODE><A HREF="../../java/lang/Comparable.html" title="interface in java.lang">Comparable</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - the <code>Object</code> to be compared.用来比较的对象。
<DT><B>Returns:</B><DD>the value <code>0</code> if the argument is a <code>Byte</code>
numerically equal to this <code>Byte</code>; a value less than
<code>0</code> if the argument is a <code>Byte</code>
numerically greater than this <code>Byte</code>; and a
value greater than <code>0</code> if the argument is a
<code>Byte</code> numerically less than this
<code>Byte</code>. 如果该参数是Byte类型，数值上等于该Byte对象，返回0，如果大于，返回小于0的数，如果小于，返回大于0的数。
<DT><B>Throws:</B>
<DD><CODE><code>ClassCastException</code></CODE> - if the argument is not a
<code><code>Byte</code></code>.如果该参数不是Byte对象。<DT><B>Since:</B></DT>
<DD>1.2</DD>
<DT><B>See Also:</B><DD><A HREF="../../java/lang/Comparable.html" title="interface in java.lang"><CODE>Comparable</CODE></A></DL>
</DD>
</DL>
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