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The code that was written before running today prompts: the type initializer for "_23.dbhelp" throws an exception.It was later discovered that there was a duplicate of the WebService update reference.bindingconfiguration= "Servicesoap" contract= "Webreferencehelp.servicesoap"Name= "Servicesoap"/>This piece of code, delete one just fineThe type initializer throws an exception.

I. Description of the problemAs soon as the company starts the Tomcat server in IntelliJ idea, the error that appears is as follows:　　Error: agent throws exception error: Java.rmi.server.ExportException:Port already in use:1099; nested exception is:java.net.BindExcep Tion:address already in Use:jvm_bindIt says that port 1099 is occupied by other processes.Two. WorkaroundFind the process that occupies port 1099, go to Windows command, see what process

When you deploy a project in eclipse the Web sometimes accesses a JSP that throws a similar exception messageOrg.apache.jasper.JasperException:The Absolute uri:http://java.sun.com/jspDeploy the Web project if this exception is thrown. Please ensure that the Standard.jar and Jstl.jar two jar packages are present in the deployed project, and if they do not exist, pleaseThese two packages are added to the/web-inf/lib. Then ensure that the version address

If a method can produce an exception, we need to use the throws keyword to label it what exception it will throw,This allows it to be captured at the time of the method invocation.The code is as follows: Packagecorejava8.exceptions; Public classThrowsdemo {Static voidThrowone ()throwsillegalaccessexception {System.out.println ("Inside Throwone."); Throw NewIllegalaccessexception ("Demo"); } Public Static voidMain (String args[]) {Try{throwone ();

1 Packagedate Calendar class;2 3 Importjava.text.ParseException;4 ImportJava.text.SimpleDateFormat;5 Importjava.util.Date;6 7 Public classTestDate {8 Public Static voidMain (string[] args) {9Date date=Newjava.util.Date ();TenSYSTEM.OUT.PRINTLN (date);//Fri Apr 22:20:12 CST OneSimpleDateFormat sdf=NewSimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"); AString d=Sdf.format (date); -System.out.println (d);//2017-04-07 22:20:12 -String d2= "2017-04-06 12:30:30"; theDate date2=NewDate (); - Try

exception information, but the scheduled task to complete the normal execution, and does not affect any other service application, and did not throw an exception !analysis from DruidProgrammers are more or less obsessive-compulsive, and cannot see abnormalities. Although the above exception does not affect the application, but thrown to give me a feeling of discomfort, forcing myself to solve it.All the anomalies are directed at Druid, so we'll start with Druid. Fortunately, there is a lot of i

Excerpted from http://cn-done.iteye.com/blog/775519Some time ago, Project code review, found that TX does not use spring transactions, and the direct encapsulation method, manual data Rollback, learned that the reason is: after throwing an exception, the transaction does not work, no rollback. This reason suddenly makes people very silent, but also a clever TX, know the alternative, but in the INSERT, manual rollback of the direct delete can be, if it is update, do not know what will be more sha

Add "Checkforillegalcrossthreadcalls = False" after the asynchronous thread starts; Can effectively prevent an asynchronous thread from throwing an exception when assigning a value to a UI controlFor example:Framework 2.0Serverthread = new Thread (recieveaccept);Serverthread.start ();Framework 4.0 or higherServertask = new Task (() = Recieveaccept ());Servertask.start ();Checkforillegalcrossthreadcalls = false;//throws an exception when an asynchronou

I. Description of the problemThe error that appears when you start the Tomcat server in IntelliJ idea is as follows:　　Error: Agent throws exception error: Java.rmi.server.ExportException:Port already in use:1099; nested exception is:java.net.BindException : Address already in Use:jvm_bindIt says that port 1099 is occupied by other processes.Two. WorkaroundFind the process that occupies port 1099, go to Windows command, see what process is consuming 10

Tags: for Dalian tips Knowledge root data source SQL Pos OCAAnswer 1: A driver-class workaround was not found when spring loaded the database connection driver. com.mchange.v2.c3p0.DriverManagerDataSourceensureDriverLoaded 1, first determine if there is a corresponding driver package 2. See if there are spaces at the end of each line in the metabase connection file. Answer 2:C3P0 data source configuration throws could not load Driverclass Com.mys

Java exception and throw and try catch:Package com; Class A extends exception ...{ } Class B extends ...{ } Public class test ...{ Public static void main (string [] ARGs )...{ Try ...{ Throw new (); } Catch (a e )...{ System. Out. println (E. getmessage ()); // E. printstacktrace (); } Try ...{ Extest (); } Catch (B e )...{ System. Out. println ("testing B "); } // Extest (); System. Out. println ("testing end "); } Public static void extest ()