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StackTraceElement (Java 2 Platform SE v1.4.2)
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<b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.4.2</b></EM>
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java.lang</FONT>
<BR>
Class StackTraceElement</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.StackTraceElement</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF=\"../../java/io/Serializable.html\" title=\"interface in java.io\">Serializable</A></DD>
</DL>
<HR>
<DL>
<DT>public final class <B>StackTraceElement</B><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>
<P>
An element in a stack trace, as returned by <A HREF=\"../../java/lang/Throwable.html#getStackTrace()\"><CODE>Throwable.getStackTrace()</CODE></A>. Each element represents a single stack frame.
All stack frames except for the one at the top of the stack represent
a method invocation. The frame at the top of the stack represents the
the execution point at which the stack trace was generated. Typically,
this is the point at which the throwable corresponding to the stack trace
was created.
堆栈跟踪中的元素，通过Throwable.getStackTrace()返回。每个元素表示单一的堆栈帧。除了堆栈最顶端的帧，每个堆栈帧都表示一次方式调用。
堆栈顶部的帧表示堆栈产生的执行点。通常，这是throwable相应堆栈跟踪的创建点。
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.4</DD>
<DT><B>See Also:</B><DD><A HREF=\"../../serialized-form.html#java.lang.StackTraceElement\">Serialized Form</A></DL>
<HR>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF=\"../../java/lang/StackTraceElement.html#equals(java.lang.Object)\">equals</A></B>(<A HREF=\"../../java/lang/Object.html\" title=\"class in java.lang\">Object</A> obj)</CODE>
<BR>
Returns true if the specified object is another
<tt>StackTraceElement</tt> instance representing the same execution
point as this instance.
假如指定的对象是另一个StackTraceElement实例，同该实例表示一样的执行点，返回true。</TD>
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<CODE> <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF=\"../../java/lang/StackTraceElement.html#getClassName()\">getClassName</A></B>()</CODE>
<BR>
Returns the fully qualified name of the class containing the
execution point represented by this stack trace element.
返回包含当前堆栈跟踪元素表示的执行点的类的全名。</TD>
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<CODE> <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF=\"../../java/lang/StackTraceElement.html#getFileName()\">getFileName</A></B>()</CODE>
<BR>
Returns the name of the source file containing the execution point
represented by this stack trace element.
返回包含当前堆栈跟踪元素表示的执行点的源文件名。</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/StackTraceElement.html#getLineNumber()\">getLineNumber</A></B>()</CODE>
<BR>
Returns the line number of the source line containing the execution
point represented by this stack trace element.
返回包含当前堆栈跟踪元素表示的执行点的源代码行号。</TD>
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<CODE> <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF=\"../../java/lang/StackTraceElement.html#getMethodName()\">getMethodName</A></B>()</CODE>
<BR>
Returns the name of the method containing the execution point
represented by this stack trace element.
返回包含当前堆栈跟踪元素表示的执行点的方式名。</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/StackTraceElement.html#hashCode()\">hashCode</A></B>()</CODE>
<BR>
Returns a hash code value for this stack trace element.
返回当前堆栈跟踪元素的hash码值。</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/StackTraceElement.html#isNativeMethod()\">isNativeMethod</A></B>()</CODE>
<BR>
Returns true if the method containing the execution point
represented by this stack trace element is a native method.
假如包含当前堆栈跟踪元素表示的执行点的方式是一个本地方式，返回true。</TD>
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<CODE> <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF=\"../../java/lang/StackTraceElement.html#toString()\">toString</A></B>()</CODE>
<BR>
Returns a string representation of this stack trace element.
返回当前堆栈跟踪元素的字符串形式。</TD>
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<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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<A NAME=\"getFileName()\"><!-- --></A><H3>
getFileName</H3>
<PRE>
public <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A> <B>getFileName</B>()</PRE>
<DL>
<DD>Returns the name of the source file containing the execution point
represented by this stack trace element. Generally, this corresponds
to the <tt>SourceFile</tt> attribute of the relevant <tt>class</tt>
file (as per <i>The Java Virtual Machine Specification</i>, Section
4.7.7). In some systems, the name may refer to some source code unit
other than a file, such as an entry in source repository.
返回包含当前堆栈跟踪元素表示的执行点的源文件名。通常，相称于相关class文件
（JVM规范，4.7.7节）SourceFile属性。的在某些系统中，该名称可能指向一些源代码单元而不是文件，比如源码仓库中的某项。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the name of the file containing the execution point
represented by this stack trace element, or <tt>null</tt> if
this information is unavailable.
包含当前堆栈跟踪元素表示的执行点的源文件名，假如信息不可用，返回null。</DL>
</DD>
</DL>
<HR>
<A NAME=\"getLineNumber()\"><!-- --></A><H3>
getLineNumber</H3>
<PRE>
public int <B>getLineNumber</B>()</PRE>
<DL>
<DD>Returns the line number of the source line containing the execution
point represented by this stack trace element. Generally, this is
derived from the <tt>LineNumberTable</tt> attribute of the relevant
<tt>class</tt> file (as per <i>The Java Virtual Machine
Specification</i>, Section 4.7.8).
返回包含当前堆栈跟踪元素表示的执行点的源代码行号。通常，由关class文件
（JVM规范，4.7.8节）LineNumberTable属性取得。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the line number of the source line containing the execution
point represented by this stack trace element, or a negative
number if this information is unavailable.
包含当前堆栈跟踪元素表示的执行点的源代码行号，假如信息不可用，返回负数。</DL>
</DD>
</DL>
<HR>
<A NAME=\"getClassName()\"><!-- --></A><H3>
getClassName</H3>
<PRE>
public <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A> <B>getClassName</B>()</PRE>
<DL>
<DD>Returns the fully qualified name of the class containing the
execution point represented by this stack trace element.
返回包含当前堆栈跟踪元素表示的执行点的类的全名。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the fully qualified name of the <tt>Class</tt> containing
the execution point represented by this stack trace element.
包含当前堆栈跟踪元素表示的执行点的类的全名。</DL>
</DD>
</DL>
<HR>
<A NAME=\"getMethodName()\"><!-- --></A><H3>
getMethodName</H3>
<PRE>
public <A HREF=\"../../java/lang/String.html\" title=\"class in java.lang\">String</A> <B>getMethodName</B>()</PRE>
<DL>
<DD>Returns the name of the method containing the execution point
represented by this stack trace element. If the execution point is
contained in an instance or class initializer, this method will return
the appropriate <i>special method name</i>, <tt><init></tt> or
<tt><clinit></tt>, as per Section 3.9 of <i>The Java Virtual
Machine Specification</i>.
返回包含当前堆栈跟踪元素表示的执行点的方式名。假如执行点包含在实例或类初始化器中，
该方式根据JVM规范3.9节返回合适的特定方式名。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the name of the method containing the execution point
represented by this stack trace element.
包含当前堆栈跟踪元素表示的执行点的方式名。</DL>
</DD>
</DL>
<HR>
<A NAME=\"isNativeMethod()\"><!-- --></A><H3>
isNativeMethod</H3>
<PRE>
public boolean <B>isNativeMethod</B>()</PRE>
<DL>
<DD>Returns true if the method containing the execution point
represented by this stack trace element is a native method.
假如包含当前堆栈跟踪元素表示的执行点的方式是一个本地方式，返回true。
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD><tt>true</tt> if the method containing the execution point
represented by this stack trace element is a native method.
假如包含当前堆栈跟踪元素表示的执行点的方式是一个本地方式，返回true。</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 string representation of this stack trace element. The
format of this string depends on the implementation, but the following
examples may be regarded as typical:
返回当前堆栈跟踪元素的字符串形式。字符串的格式依靠于实现，但是通常以以下实例为准：
<ul>
<li>
<tt>\"MyClass.mash(MyClass.java:9)\"</tt> - Here, <tt>\"MyClass\"</tt>
is the <i>fully-qualified name</i> of the class containing the
execution point represented by this stack trace element,
<tt>\"mash\"</tt> is the name of the method containing the execution
point, <tt>\"MyClass.java\"</tt> is the source file containing the
execution point, and <tt>\"9\"</tt> is the line number of the source
line containing the execution point.
这里，“MyClass”是包含当前堆栈跟踪元素表示的执行点的类的全名，“mash”
是包含执行点的方式名，“MyClass.java”是包含执行点的源文件，“9”是包含执行点的源代码行号。
<li>
<tt>\"MyClass.mash(MyClass.java)\"</tt> - As above, but the line
number is unavailable.
同以上，但行号不可用。
<li>
<tt>\"MyClass.mash(Unknown Source)\"</tt> - As above, but neither
the file name nor the line number are available.
同以上，但文件名和行号均不可用。
<li>
<tt>\"MyClass.mash(Native Method)\"</tt> - As above, but neither
the file name nor the line number are available, and the method
containing the execution point is known to be a native method.
同以上，但文件名和行号均不可用，包含执行点的方式是本地方式。。
</ul>
<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 object.<DT><B>See Also:</B><DD><A HREF=\"../../java/lang/Throwable.html#printStackTrace()\"><CODE>Throwable.printStackTrace()</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>Returns true if the specified object is another
<tt>StackTraceElement</tt> instance representing the same execution
point as this instance. Two stack trace elements <tt>a</tt> and
<tt>b</tt> are equal if and only if:
假如指定的对象是另一个StackTraceElement实例，同该实例表示一样的执行点，返回true。
只有当两个堆栈跟踪元素a和b满意以下条件时认为相等：
<pre>
equals(a.getFileName(), b.getFileName()) &&
a.getLineNumber() == b.getLineNumber()) &&
equals(a.getClassName(), b.getClassName()) &&
equals(a.getMethodName(), b.getMethodName())
</pre>
where <tt>equals</tt> is defined as:
此处，equals定义为：
<pre>
static boolean equals(Object a, Object b) {
return a==b || (a != null && a.equals(b));
}
</pre>
<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 be compared with this stack trace element. 要同当前堆栈跟踪元素比较的对象。
<DT><B>Returns:</B><DD>true if the specified object is another
<tt>StackTraceElement</tt> instance representing the same
execution point as this instance.
假如指定的对象是另一个StackTraceElement实例，同该实例表示一样的执行点，返回true。<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=\"hashCode()\"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns a hash code value for this stack trace element.
返回当前堆栈跟踪元素的hash码值。
<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.
当前堆栈跟踪元素的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>
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