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java.lang.Number翻译

作者：未知来源：月光软件站 加入时间：2005-5-13　月光软件站

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Number (Java 2 Platform SE v1.4.2)
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<H2>

java.lang
 
Class Number</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">java.lang.Number
</PRE>
<DL>
<DT>All Implemented Interfaces: <DD><A HREF="../../java/io/Serializable.html" title="interface in java.io">Serializable</A></DD>
</DL>
<DL>
<DT>Direct Known Subclasses: <DD><A HREF="../../java/math/BigDecimal.html" title="class in java.math">BigDecimal</A>, <A HREF="../../java/math/BigInteger.html" title="class in java.math">BigInteger</A>, <A HREF="../../java/lang/Byte.html" title="class in java.lang">Byte</A>, <A HREF="../../java/lang/Double.html" title="class in java.lang">Double</A>, <A HREF="../../java/lang/Float.html" title="class in java.lang">Float</A>, <A HREF="../../java/lang/Integer.html" title="class in java.lang">Integer</A>, <A HREF="../../java/lang/Long.html" title="class in java.lang">Long</A>, <A HREF="../../java/lang/Short.html" title="class in java.lang">Short</A></DD>
</DL>
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<DL>
<DT>public abstract class Number<DT>extends <A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A><DT>implements <A HREF="../../java/io/Serializable.html" title="interface in java.io">Serializable</A></DL>

The abstract class <code>Number</code> is the superclass of classes
<code>BigDecimal</code>, <code>BigInteger</code>,
<code>Byte</code>, <code>Double</code>, <code>Float</code>,
<code>Integer</code>, <code>Long</code>, and <code>Short</code>.
该Number抽象类是BigDecimal、BigInteger、Byte、Double、Float、Integer、Long、Short类的父类。

Subclasses of <code>Number</code> must provide methods to convert
the represented numeric value to <code>byte</code>, <code>double</code>,
<code>float</code>, <code>int</code>, <code>long</code>, and
<code>short</code>.
Number的子类必须提供把代表的数值转化成byte、double、float、int、long、short类型的方法。

<DL>
<DT>Since:</DT>
<DD>JDK1.0</DD>
<DT>See Also:<DD><A HREF="../../java/lang/Byte.html" title="class in java.lang"><CODE>Byte</CODE></A>,
<A HREF="../../java/lang/Double.html" title="class in java.lang"><CODE>Double</CODE></A>,
<A HREF="../../java/lang/Float.html" title="class in java.lang"><CODE>Float</CODE></A>,
<A HREF="../../java/lang/Integer.html" title="class in java.lang"><CODE>Integer</CODE></A>,
<A HREF="../../java/lang/Long.html" title="class in java.lang"><CODE>Long</CODE></A>,
<A HREF="../../java/lang/Short.html" title="class in java.lang"><CODE>Short</CODE></A>,
<A HREF="../../serialized-form.html#java.lang.Number">Serialized Form</A></DL>
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<TD><CODE><A HREF="../../java/lang/Number.html#Number()">Number</A>()</CODE>

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<CODE> byte</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#byteValue()">byteValue</A>()</CODE>

Returns the value of the specified number as a <code>byte</code>.将指定numer值以byte形式返回。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>abstract  double</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#doubleValue()">doubleValue</A>()</CODE>

Returns the value of the specified number as a <code>double</code>.将指定numer值以double形式返回。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>abstract  float</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#floatValue()">floatValue</A>()</CODE>

Returns the value of the specified number as a <code>float</code>.将指定numer值以float形式返回。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>abstract  int</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#intValue()">intValue</A>()</CODE>

Returns the value of the specified number as an <code>int</code>.将指定numer值以int形式返回。</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>abstract  long</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#longValue()">longValue</A>()</CODE>

Returns the value of the specified number as a <code>long</code>.将指定numer值以long形式返回。</TD>
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<CODE> short</CODE></TD>
<TD><CODE><A HREF="../../java/lang/Number.html#shortValue()">shortValue</A>()</CODE>

Returns the value of the specified number as a <code>short</code>.将指定numer值以short形式返回。</TD>
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<TD>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../java/lang/Object.html#equals(java.lang.Object)">equals</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#hashCode()">hashCode</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#toString()">toString</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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<A NAME="Number()"></A><H3>
Number</H3>
<PRE>
public Number()</PRE>
<DL>
</DL>

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<A NAME="intValue()"></A><H3>
intValue</H3>
<PRE>
public abstract int intValue()</PRE>
<DL>
<DD>Returns the value of the specified number as an <code>int</code>.
This may involve rounding or truncation.将指定numer值以int形式返回，可能涉及舍入或取整。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>int</code>.该对象转化成int类型后表示的数值。</DL>
</DD>
</DL>
<HR>

<A NAME="longValue()"></A><H3>
longValue</H3>
<PRE>
public abstract long longValue()</PRE>
<DL>
<DD>Returns the value of the specified number as a <code>long</code>.
This may involve rounding or truncation.将指定numer值以long形式返回，可能涉及舍入或取整。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>long</code>.该对象转化成long类型后表示的数值。</DL>
</DD>
</DL>
<HR>

<A NAME="floatValue()"></A><H3>
floatValue</H3>
<PRE>
public abstract float floatValue()</PRE>
<DL>
<DD>Returns the value of the specified number as a <code>float</code>.
This may involve rounding.将指定numer值以float形式返回，可能涉及舍入。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>float</code>.该对象转化成float类型后表示的数值。</DL>
</DD>
</DL>
<HR>

<A NAME="doubleValue()"></A><H3>
doubleValue</H3>
<PRE>
public abstract double doubleValue()</PRE>
<DL>
<DD>Returns the value of the specified number as a <code>double</code>.
This may involve rounding.将指定numer值以double形式返回，可能涉及舍入。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>double</code>.该对象转化成double类型后表示的数值。</DL>
</DD>
</DL>
<HR>

<A NAME="byteValue()"></A><H3>
byteValue</H3>
<PRE>
public byte byteValue()</PRE>
<DL>
<DD>Returns the value of the specified number as a <code>byte</code>.
This may involve rounding or truncation.将指定numer值以byte形式返回，可能涉及舍入或取整。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>byte</code>.该对象转化成byte类型后表示的数值。<DT>Since:</DT>
<DD>JDK1.1</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="shortValue()"></A><H3>
shortValue</H3>
<PRE>
public short shortValue()</PRE>
<DL>
<DD>Returns the value of the specified number as a <code>short</code>.
This may involve rounding or truncation.将指定numer值以short形式返回，可能涉及舍入或取整。

<DD><DL>
</DL>
</DD>
<DD><DL>

<DT>Returns:<DD>the numeric value represented by this object after conversion
to type <code>short</code>.该对象转化成short类型后表示的数值。<DT>Since:</DT>
<DD>JDK1.1</DD>
</DL>
</DD>
</DL>

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