blocks|key|4631556|text|尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4631557|throw+new+Exception("transction:+"+%2B+transNbr,+E);+|code-block|syntax|javascript|4631558|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try:

<pre><code>throw new Exception("transction: " + transNbr, E); 
</code></pre>

blocks|key|2991206|text|还有一个带有原因参数的Exception构造函数：Exception(String+message,+Throwable+t)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2991207|您可以使用它来传播堆栈跟踪：|2991208|try{
++++//...
}catch(Exception+E){
++++if(!transNbr.equals("")){
++++++++throw+new+Exception("transaction:+"+%2B+transNbr,+E);+
++++}
++++//...
}|code-block|syntax|javascript|2991209|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html#Exception%2528java.lang.String,%2520java.lang.Throwable%2529^0|B|9|P|12|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

There is an <code>Exception</code> constructor that takes also the cause argument: <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html#Exception%28java.lang.String,%20java.lang.Throwable%29" rel="nofollow noreferrer">Exception(String message, Throwable t)</a>. 

You can use it to propagate the stacktrace:

<pre><code>try{
 //...
}catch(Exception E){
 if(!transNbr.equals("")){
 throw new Exception("transaction: " + transNbr, E); 
 }
 //...
}
</code></pre>

blocks|key|2555433|text|异常通常是不可变的:您不能在创建它们之后更改它们的消息。但是，您可以做的是链异常：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2555434|throw+new+TransactionProblemException(transNbr,+originalException);|code-block|syntax|javascript|2555435|堆栈跟踪将如下所示|2555436|TransactionProblemException+:+transNbr
at+...
at+...
caused+by+OriginalException+...
at+...
at+...|2555437|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Exceptions are usually immutable: you can't change their message after they've been created. What you can do, though, is chain exceptions:

<pre><code>throw new TransactionProblemException(transNbr, originalException);
</code></pre>

The stack trace will look like

<pre><code>TransactionProblemException : transNbr
at ...
at ...
caused by OriginalException ...
at ...
at ...
</code></pre>

blocks|key|2553876|text|您可以通过以下方式使用您的异常消息：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2553877|+public+class+MyNullPointException+extends+NullPointerException+{

++++++++private+ExceptionCodes+exceptionCodesCode;

++++++++public+MyNullPointException(ExceptionCodes+code)+{
++++++++++++this.exceptionCodesCode=code;
++++++++}
++++++++@Override
++++++++public+String+getMessage()+{
++++++++++++return+exceptionCodesCode.getCode();
++++++++}


+++public+class+enum+ExceptionCodes+{
++++COULD_NOT_SAVE_RECORD+("cityId:001(could.not.save.record)"),
++++NULL_POINT_EXCEPTION_RECORD+("cityId:002(null.point.exception.record)"),
++++COULD_NOT_DELETE_RECORD+("cityId:003(could.not.delete.record)");

++++private+String+code;

++++private+ExceptionCodes(String+code)+{
++++++++this.code+=+code;
++++}

++++public+String+getCode()+{
++++++++return+code;
++++}
}|code-block|syntax|javascript|2553878|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use your exception message by:-

<pre><code> public class MyNullPointException extends NullPointerException {

 private ExceptionCodes exceptionCodesCode;

 public MyNullPointException(ExceptionCodes code) {
 this.exceptionCodesCode=code;
 }
 @Override
 public String getMessage() {
 return exceptionCodesCode.getCode();
 }


 public class enum ExceptionCodes {
 COULD_NOT_SAVE_RECORD ("cityId:001(could.not.save.record)"),
 NULL_POINT_EXCEPTION_RECORD ("cityId:002(null.point.exception.record)"),
 COULD_NOT_DELETE_RECORD ("cityId:003(could.not.delete.record)");

 private String code;

 private ExceptionCodes(String code) {
 this.code = code;
 }

 public String getCode() {
 return code;
 }
}
</code></pre>

blocks|key|4631700|text|你可以在扩展异常的时候使用super|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4631701|if+(pass.length()+<+minPassLength)
++++throw+new+InvalidPassException("The+password+provided+is+too+short");
+}+catch+(NullPointerException+e)+{
++++throw+new+InvalidPassException("No+password+provided",+e);
+}


//+A+custom+business+exception
class+InvalidPassException+extends+Exception+{

InvalidPassException()+{

}

InvalidPassException(String+message)+{
++++super(message);
}
InvalidPassException(String+message,+Throwable+cause)+{
+++super(message,+cause);
}|code-block|syntax|javascript|4631702|}|4631703|4631704|source|offset|length|4631705|entityMap|0|LINK|mutability|MUTABLE|url|http://examples.javacodegeeks.com/java-basics/exceptions/create-custom-exception-example/^0|0|0|0|0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|X|8|@]|9|@]|A|$]]|$1|I|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Z|8|@]|9|@$L|10|M|11|1|12]]|A|$]]|$1|N|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]]]

you can use super while extending Exception

<pre><code>if (pass.length() &lt; minPassLength)
 throw new InvalidPassException("The password provided is too short");
 } catch (NullPointerException e) {
 throw new InvalidPassException("No password provided", e);
 }


// A custom business exception
class InvalidPassException extends Exception {

InvalidPassException() {

}

InvalidPassException(String message) {
 super(message);
}
InvalidPassException(String message, Throwable cause) {
 super(message, cause);
}
</code></pre>

}

}

<a href="http://examples.javacodegeeks.com/java-basics/exceptions/create-custom-exception-example/" rel="nofollow">source</a>

blocks|key|4631823|text|下面的代码是一个适用于me.Let+me的简单示例，它将函数main称为父函数，将divide称为子函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4631824|基本上，如果在子函数中发生异常，我会通过先捕获子函数中的异常，通过我的自定义消息(用于父函数的调用)抛出新的异常。|BOLD|4631825|class+Main+{
++++public+static+void+main(String+args[])+{
++++++++try{
++++++++++++long+ans=divide(0);
++++++++++++System.out.println("answer="%2Bans);
++++++++}
++++++++catch(Exception+e){
++++++++++++System.out.println("got+exception:"%2Be.getMessage());

++++++++}

++++}
++++public+static+long+divide(int+num)+throws+Exception{
++++++++long+x=-1;
++++++++try+{
++++++++++++x=5/num;
++++++++}
++++++++catch+(Exception+e){
++++++++++++throw+new+Exception("Error+occured+in+divide+for+number:"%2Bnum%2B"Error:"%2Be.getMessage());
++++++++}
++++++++return+x;
++++}
}++|code-block|syntax|javascript|4631826|如果在两者之间发生错误，最后一行return+x将不会运行。|4631827|entityMap^0|U|4|15|6|0|X|7|0|0|G|8|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|Z|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|P|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|Q|$]]

Following code is a simple example that worked for me.Let me call the function <code>main</code> as parent function and <code>divide</code> as child function. 
Basically i am throwing a new exception with my custom message (for the parent's call) if an exception occurs in child function by catching the Exception in the child first. 

<pre><code>class Main {
 public static void main(String args[]) {
 try{
 long ans=divide(0);
 System.out.println("answer="+ans);
 }
 catch(Exception e){
 System.out.println("got exception:"+e.getMessage());

 }

 }
 public static long divide(int num) throws Exception{
 long x=-1;
 try {
 x=5/num;
 }
 catch (Exception e){
 throw new Exception("Error occured in divide for number:"+num+"Error:"+e.getMessage());
 }
 return x;
 }
} 
</code></pre>

the last line <code>return x</code> will not run if error occurs somewhere in between.

blocks|key|4721135|text|您可以编写一个从Exception扩展的Exception类并添加属性，就像这样：`公共类PaymentException扩展Exception+{公共对象数据；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4721136|public+PaymentException(Throwable+cause)+{
++++super(cause);
}

public+void+setData(Object+o)+{
++++data+=+o;
}
public+Object+getData()+{
++++return+data;
}|code-block|syntax|javascript|4721137|}`|4721138|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can write a Exception class extend from Exception and add attribute just like that:`
public class PaymentException extends Exception {
public Object data;
<pre><code>public PaymentException(Throwable cause) {
 super(cause);
}

public void setData(Object o) {
 data = o;
}
public Object getData() {
 return data;
}
</code></pre>
}`

I have a small piece of code that runs through some transactions for processing. Each transaction is marked with a transaction number, which is generated by an outside program and is not necessarily sequenced. When I catch an Exception in the processing code I am throwing it up to the main class and logging it for review later. I'd like to add the transaction number to this thrown Exception. Is it possible to do this while still maintaining the correct stack trace?

For Example:

<pre><code>public static void main(String[] args) {
 try{
 processMessage();
 }catch(Exception E){
 E.printStackTrace();
 }

}

private static void processMessage() throws Exception{
 String transNbr = "";
 try{
 transNbr = "2345";
 throw new Exception();
 }catch(Exception E){
 if(!transNbr.equals("")){
 //stack trace originates from here, not from actual exception
 throw new Exception("transction: " + transNbr); 
 }else{
 //stack trace gets passed correctly but no custom message available
 throw E;
 }
 }
}
</code></pre>

Add custom message to thrown exception while maintaining stack trace in Java

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一小段代码，可以运行一些事务进行处理。每笔交易都标有一个交易号，该交易号由外部程序生成，不一定要排序。当我在处理代码中捕获到异常时，我会将其抛出到主类中，并将其记录下来以供以后复查。我想将事务编号添加到这个抛出的异常中。有没有可能在保持正确的堆栈跟踪的同时做到这一点？例如：public static void ma...

问在Java中维护堆栈跟踪的同时向抛出的异常添加自定义消息
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