异常处理类代码,Java代码库,德仔网

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【Java】异常处理类
作者: / 发布于2011/1/14/ 724
<div><span style="color: #008000">/**</span><span style="color: #008000">
* (#)ThrowableManager.java 1.0 Apr 10, 2008
* 
* Copyright 2007- wargrey , Inc. All rights are reserved.
</span><span style="color: #008000">*/</span><span style="color: #000000">
</span><span style="color: #0000ff">package</span><span style="color: #000000"> net.wargrey.application;

</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.awt.Component;
</span><span style="color: #0000ff">import</span><span style="color: #000000"> javax.swing.JOptionPane;

</span><span style="color: #008000">/**</span><span style="color: #008000">
* This class ExceptionManager and its subclasses are a form of 
* Exception. It is used to wrap all the Throwable instances
* and handle them in a unified way. It will show the information which consists of 
* StackTraces and Messages by using JOptionPanel.
* 
* </span><span style="color: #808080">@author</span><span style="color: #008000"> Estelle
* </span><span style="color: #808080">@version</span><span style="color: #008000"> 1.0
* </span><span style="color: #808080">@see</span><span style="color: #008000"> java.lang.Exception
* </span><span style="color: #808080">@since</span><span style="color: #008000"> jdk 1.5
</span><span style="color: #008000">*/</span><span style="color: #000000">
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">class</span><span style="color: #000000"> ExceptionManager </span><span style="color: #0000ff">extends</span><span style="color: #000000"> Exception {
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * This field alerter is used to show the information the Class offered.
 * 
 * </span><span style="color: #808080">@see</span><span style="color: #008000"> javax.swing.JOptionPane
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">private</span><span style="color: #000000"> JOptionPane alerter;
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * This static method create an instance of the ExceptionManager by invoking the 
 * constructor ExceptionManager(String msg).
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> msg The message will pass the specified constructor
 * </span><span style="color: #808080">@return</span><span style="color: #008000"> An instance of the ExceptionManager created by invoking the constructor
 * ExceptionManager(String msg).
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> ExceptionManager wrap(String msg){
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> ExceptionManager(msg);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * This static method create an instance of the ExceptionManager by invoking the 
 * constructor ExceptionManager(Throwable throwable).
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> throwable The cause will pass the specified constructor
 * </span><span style="color: #808080">@return</span><span style="color: #008000"> An instance of the ExceptionManager created by invoking the constructor
 * ExceptionManager(Throwable throwable).
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> ExceptionManager wrap(Throwable throwable){
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> ExceptionManager(throwable);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * This static method create an instance of the ExceptionManager by invoking the 
 * constructor ExceptionManager(String msg,Throwable throwable). 
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> msg The message will pass the specified constructor
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> throwable The cause will pass the specified constructor
 * </span><span style="color: #808080">@return</span><span style="color: #008000"> An instance of the ExceptionManager created by invoking the constructor
 * ExceptionManager(String msg, Throwable throwable)
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> ExceptionManager wrap(String msg,Throwable throwable){
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> ExceptionManager(msg,throwable);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Constructs a new instance with the specified detail message. The concrete handler 
 * is its super class. This constructor always used to construct a custom exception
 * not wrapping the exist exception.
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> msg the detail message which is the part of the information will be
 * shown.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> ExceptionManager(String msg){
 </span><span style="color: #0000ff">super</span><span style="color: #000000">(msg);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Constructs a new instance with the specified detail cause. The concrete handler 
 * is its super class. This constructor always used to wrap an exist exception.
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> throwable the cause which has been caught. It's detail message and 
 * stacktrace are the parts the information will be shown.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> ExceptionManager(Throwable throwable){
 </span><span style="color: #0000ff">super</span><span style="color: #000000">(throwable);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Constructs a new instance with the specified detail message and cause. The 
 * concrete handler is its super class. This constructor always used to construct
 * an exception wrapping the exist exception but requires a custom message. 
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> msg the detail message which is the part of the information will 
 * be shown.
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> throwable the cause which has been caught. It's stacktrace is the parts
 * the information will be shown.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> ExceptionManager(String msg,Throwable throwable){
 </span><span style="color: #0000ff">super</span><span style="color: #000000">(msg,throwable);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Show the information with everything is default.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">synchronized</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> alert(){
 alert((Component)</span><span style="color: #0000ff">null</span><span style="color: #000000">);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Show the information in a dialog with the specified title 
 * "ThrowableManager Alerter". The dialog belongs to the given component which 
 * default is the screen. 
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> parent The component cause the exception.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">synchronized</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> alert(Component parent){
 alert(parent,</span><span style="color: #000000">"</span><span style="color: #000000">ThrowableManager Alerter</span><span style="color: #000000">"</span><span style="color: #000000">);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Show the information in a dialog with the specified title.
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> title The title of the dialog.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">synchronized</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> alert(String title){
 alert((Component)</span><span style="color: #0000ff">null</span><span style="color: #000000">,title);
 }
 
 </span><span style="color: #008000">/**</span><span style="color: #008000">
 * Show the information in a dialog which has the specified title and belongs to the
 * specified component.
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> parent The component cause the exception.
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> title The title of the dialog.
 </span><span style="color: #008000">*/</span><span style="color: #000000">
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">synchronized</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> alert(Component parent,String title){
 StringBuilder errorMessage</span><span style="color: #000000">=</span><span style="color: #0000ff">new</span><span style="color: #000000"> StringBuilder();
 errorMessage.append(</span><span style="color: #0000ff">this</span><span style="color: #000000">.toString());
 </span><span style="color: #0000ff">for</span><span style="color: #000000"> (StackTraceElement st:((</span><span style="color: #0000ff">this</span><span style="color: #000000">.getCause()</span><span style="color: #000000">==</span><span style="color: #0000ff">null</span><span style="color: #000000">)</span><span style="color: #000000">?</span><span style="color: #0000ff">this</span><span style="color: #000000">:</span><span style="color: #0000ff">this</span><span style="color: #000000">.getCause()).getStackTrace()){
 errorMessage.append(</span><span style="color: #000000">"</span><span style="color: #000000">\n\t at </span><span style="color: #000000">"</span><span style="color: #000000">);
 errorMessage.append(st.toString());
 } 
 alerter.showMessageDialog(parent, errorMessage, title ,JOptionPane.ERROR_MESSAGE);
 }
}</span>
</div>
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