Web Dev Box

Some of the most dreaded fault inwards Java based customer server based application is networking related error, e.g. java.net.BindException: Cannot assign requested address: JVM_Bind . I get got faced this issue, spell working alongside spider web servers similar Tomcat , Jetty , together with Weblogic before, exactly yesterday it came again, when ane of my colleague faced this termination inwards Windows. As presently every bit Java programmers sees java.net.BindException , they come upwards to decision that it's termination alongside two procedure listening on same port , together with ofttimes mistook it for Java.net.BindException: Address already inwards use: JVM_Bind:8080 , which is slightly dissimilar than this. If you lot hold back Java documentation for java.net.BindExcpetion , you lot volition uncovering this "Signals that an fault occurred spell attempting to bind a socket to a local address together with port. Typically, the port is inwards use, or the requeste...

The error ArrayIndexOutOfBoundsException : 1 agency index 1 is invalid together with it's out of outflow i.e. to a greater extent than than the length of the array. Since array has a zero-based index inwards Java , this agency you lot are trying to access the minute chemical component subdivision of an array which alone contains i element. The ArrayIndexOutfBoundsException comes when your code, generally for loop tries to access an invalid index of the array. If you lot get got worked inwards C, C++ therefore you lot volition uncovering this difference betwixt array inwards C together with Java . You exactly cannot access invalid array index inwards Java i.e. indexes which are less than naught together with to a greater extent than than the length of the array. ArrayIndexOutOfBounds is besides a subclass of IndexOutOfBoundsException which is used to throw error related to invalid index e.g. attempt to access exterior of length inwards String etc. An array is a information co...

java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory  or " Exception inwards thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory " exception comes when you lot don't apache commons-logging-1.1.1.jar inwards your Classpath. I convey faced this exception many times piece using open source framework similar Struts, Spring together with Displaytag which uses commons-logging framework for logging. commons-logging is non an actual coffee logging framework simply provides a wrapper then that you lot tin purpose log4j, java logging or any other Java logging framework. commons-logging is every bit good smart plenty to abide by which logging framework are you lot using e.g if you lot are using log4j it tin abide by it past times looking log4j.jar inwards your classpath. simply if you lot don't convey commons-logging.jar in your classpath you lot may instruct java.lang.ClassNotFoundException: org.apache.commons...

java.net.ConnectException: Connection refused: connect is ane of the most mutual networking exceptions inward Java. This fault comes when you lot are working amongst client-server architecture as well as trying to brand TCP connexion from the customer to the server. Though this is non every bit cryptic every bit java.lang.OutOfMemoryError: Java heap Space or java.lang.UnsupportedClassVersionError , it’s nevertheless a frequent occupation inward distributed Java applications. java.net.ConnectException: Connection refused: connect also comes inward the illustration of RMI (Remote Method Invocation) because RMI also uses TCP-IP protocol underneath. While writing customer socket code inward Java, You should ever furnish proper treatment of this exception .  In this Java tutorial, nosotros volition meet why connexion refused exception comes as well as how to solve java.net.ConnectException: Connection refused: connect Exception inward Java. Normally, Java books similar Head Fi...

One of annoying fault piece overriding Java method inwards Eclipse IDE is must override a superclass method error , This fault is quite frequent when importing Java   projects too nonetheless I haven't seen whatever permanent solution of it. Must override a super degree method fault comes inwards Eclipse, if y'all h ave Java Class that implements interface too overrides method from interface too uses @Override annotation . Unfortunately Eclipse defaults to Java 1.5, which exclusively recognize @Override notation for overriding method from super degree too non from interface. This creates lots of confusion betwixt Java programmers every bit non every ane is aware of this subtle departure of using @Override notation amongst degree too interface methods too they outset looking classpath too path suspiciously. @Override notation for interface methods are exclusively available from Java 1.6 too if y'all purpose @Override while overriding interface method tha n y'...

If you lot accept worked inwards Spring MVC than you lot may hold upwards familiar alongside   java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener ,  which is mutual work during deployment. Spring MVC throws   java.lang.ClassNotFoundException:                           org.springframework.web.context.ContextLoaderListener , when its non able to notice org.springframework.web.context.ContextLoaderListener bird which is used to charge boundary MVC configuration files similar application-context.xml too other Spring Framework configuration files defined inwards context-param chemical element of web.xml inwards an Spring MVC spider web application as: <!-- boundary mvc setup --> < context-param >     < param-name > contextConfigLocation </ param-name > ...