java.lang.Number翻译 - 王朝网络

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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>

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<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>

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<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>

<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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Constructor Summary</TD>

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

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Method Summary</TD>

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<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>

<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>

<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>

<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>

</TR>

<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>

</TR>

<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>

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<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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Constructor Detail</TD>

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Number</H3>

<PRE>

public Number()</PRE>

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Method Detail</TD>

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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。

</DL>

</DD>

<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>

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。

</DL>

</DD>

<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>

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。

</DL>

</DD>

<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>

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。

</DL>

</DD>

<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>

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。

</DL>

</DD>

<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>

</DL>

</DD>

</DL>

<HR>

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。

</DL>

</DD>

<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>

</DL>

</DD>

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