java.lang.Compiler翻译

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Compiler (Java 2 Platform SE v1.4.2)
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<b>Java<sup><font size=-2>TM</font></sup>&nbsp;2&nbsp;Platform<br>Std.&nbsp;Ed. v1.4.2</b></EM>
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java.lang</FONT>
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Class Compiler</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>java.lang.Compiler</B>
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<DL>
<DT>public final class <B>Compiler</B><DT>extends <A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></DL>

<P>
The <code>Compiler</code> class is provided to support
 Java-to-native-code compilers and related services. By design, the
 <code>Compiler</code> class does nothing; it serves as a
 placeholder for a JIT compiler implementation.
 Compiler类被用来支持Java-本地代码的编译器和相关服务。设计中,Compiler不做任何事,只是充当JIT编译器实现中的占位符。
 <p>
 When the Java Virtual Machine first starts, it determines if the
 system property <code>java.compiler</code> exists. (System
 properties are accessible through <code>getProperty</code>  and ,
 a method defined by the <code>System</code> class.) If so, it is
 assumed to be the name of a library (with a platform-dependent
 exact location and type); the <code>loadLibrary</code> method in
 class <code>System</code> is called to load that library. If this
 loading succeeds, the function named
 <code>java_lang_Compiler_start()</code> in that library is called.
 当Java虚拟机第一次启动时,它先判断系统属性java.compiler是否存在(系统属性通过
 System类的getProperty方法访问)。如果存在,它将被假定为一个库名(一个平台无关的确切路径和类型),调用System
 的loadLibrary方法加载该库。如果成功加载,调用该库中的java_lang_Compiler_start()方法。
 <p>
 If no compiler is available, these methods do nothing.
 如果没有可用的编译器,这些方法不做任何事。
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>JDK1.0</DD>
<DT><B>See Also:</B><DD><A HREF="../../java/lang/System.html#getProperty(java.lang.String)"><CODE>System.getProperty(java.lang.String)</CODE></A>,
<A HREF="../../java/lang/System.html#getProperty(java.lang.String, java.lang.String)"><CODE>System.getProperty(java.lang.String, java.lang.String)</CODE></A>,
<A HREF="../../java/lang/System.html#loadLibrary(java.lang.String)"><CODE>System.loadLibrary(java.lang.String)</CODE></A></DL>
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<B>Method Summary</B></FONT></TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Compiler.html#command(java.lang.Object)">command</A></B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A>&nbsp;any)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Examines the argument type and its fields and perform some documented
 operation.检查参数类型及其域,并执行某些文档操作。</TD>
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<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Compiler.html#compileClass(java.lang.Class)">compileClass</A></B>(<A HREF="../../java/lang/Class.html" title="class in java.lang">Class</A>&nbsp;clazz)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compiles the specified class.编译指定的类。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Compiler.html#compileClasses(java.lang.String)">compileClasses</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A>&nbsp;string)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compiles all classes whose name matches the specified string.编译所有名称和指定字符串相匹配的类。</TD>
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<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Compiler.html#disable()">disable</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cause the Compiler to cease operation.
使Compiler中止运行。</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Compiler.html#enable()">enable</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cause the Compiler to resume operation.
使Compiler恢复运行。</TD>
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<TD><B>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></B></TD>
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<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="compileClass(java.lang.Class)"><!-- --></A><H3>
compileClass</H3>
<PRE>
public static boolean <B>compileClass</B>(<A HREF="../../java/lang/Class.html" title="class in java.lang">Class</A>&nbsp;clazz)</PRE>
<DL>
<DD>Compiles the specified class. 编译指定的类。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>clazz</CODE> - a class. 类。
<DT><B>Returns:</B><DD><code>true</code> if the compilation succeeded;
          <code>false</code> if the compilation failed or no compiler
          is available. 如果编译成功,返回true,如果编译失败或者没有可用的编译器返回false。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</A></CODE> - if <code>clazz</code> is
          <code>null</code>. 如果clazz为null时抛出。</DL>
</DD>
</DL>
<HR>

<A NAME="compileClasses(java.lang.String)"><!-- --></A><H3>
compileClasses</H3>
<PRE>
public static boolean <B>compileClasses</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A>&nbsp;string)</PRE>
<DL>
<DD>Compiles all classes whose name matches the specified string.
编译所有名称和指定字符串相匹配的类。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>string</CODE> - the name of the classes to compile. 用来编译的类名称。
<DT><B>Returns:</B><DD><code>true</code> if the compilation succeeded;
          <code>false</code> if the compilation failed or no compiler
          is available. 如果编译成功,返回true,如果编译失败或者没有可用的编译器返回false。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</A></CODE> - if <code>string</code> is
          <code>null</code>. 如果string为null时抛出。</DL>
</DD>
</DL>
<HR>

<A NAME="command(java.lang.Object)"><!-- --></A><H3>
command</H3>
<PRE>
public static <A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A> <B>command</B>(<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A>&nbsp;any)</PRE>
<DL>
<DD>Examines the argument type and its fields and perform some documented
 operation. No specific operations are required.
 检查参数类型及其域,并执行某些文档操作。不需要指定操作。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>any</CODE> - an argument. 参数。
<DT><B>Returns:</B><DD>a compiler-specific value, or <code>null</code> if no compiler
          is available. 编译器指定值,如果没有可用的编译器,为null。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</A></CODE> - if <code>any</code> is
          <code>null</code>. 如果any为null时抛出。</DL>
</DD>
</DL>
<HR>

<A NAME="enable()"><!-- --></A><H3>
enable</H3>
<PRE>
public static void <B>enable</B>()</PRE>
<DL>
<DD>Cause the Compiler to resume operation. 使Compiler恢复运行。
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="disable()"><!-- --></A><H3>
disable</H3>
<PRE>
public static void <B>disable</B>()</PRE>
<DL>
<DD>Cause the Compiler to cease operation. 使Compiler中止运行。
<P>
<DD><DL>
</DL>
</DD>
</DL>
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