java exception has occurred

First, what is an anomaly?Exception refers to the various conditions, such as: file cannot be found, network connection failure, illegal parameters and so on. An exception is an event that interferes with the normal instruction flow during the program's run. ( a flow of instruction that causes a program to break )Java describes various kinds of exceptions through

Program small white in the process of writing code, often inadvertently write a memory overflow exception occurred code. A lot of times this kind of anomaly how to produce all silly confused, if can deliberately write to let JVM memory overflow code, sometimes it seems not easy. Recently, by learning the deep understanding of Java Virtual Machine-JVM advanced fea

Java exception mechanism and java Mechanism The Exception mechanism in java is very important, and the program will inevitably encounter errors. The Exception mechanism can capture errors in the program to improve the stability an

most essential difference between exceptions and errors is that exceptions can be handled by developers. When errors occur, the system comes with them. Generally, they cannot be handled and do not need to be handled by our programmers.1. An exception is an event that occurs during the execution of a program. It interrupts the running of normal commands.2. Error. An action or instance that deviates from an acceptable code behaviorException Structure c

Ack to where the exception occurred. Whoever threw the exception decided that there is no-to-salvage the situation, and they don ' t want to come back. the alternative is called resumption. It means that the exception handler are expected to does something to rectify the situation, and then the faulting method is Retr

in theJava, abnormal conditions are divided intoException(Exception) andError(Error) Two major categories,Javaexception usually refers to the program during the operation of abnormal conditions, such as user input errors, divisor is zero, need to deal with the file does not exist, array subscript out of bounds, for the occurrence of abnormal conditions, can use exception processing, in order to ensure that

Package prac_1;/** * A little bit every day Java---Inherit the exception class to implement its own exception class

violate the visibility declaration of a domain or method.Java.lang.IncompatibleClassChangeErrorIncompatible class change error. This exception is thrown when an incompatible change is made to the class definition on which the method being executed depends. This error is easily thrown when you modify the declaration definition for some classes in your app without recompiling the entire application.Java.lang.InstantiationErrorInstantiation of the error

exceptions that you know how to handle, and advertise those exceptions that you do not understand how to handle. And for those that cannot be checked, they are either outside our control (Error) or we should not allow it first (runtimeexception). As for the exception designation, the Java rule is very simple: a method must notify itself of all possible check exceptions that may be generated. When writing y

Overview When an error occurs inside a method, the method creates an object that is passed to the runtime system, which is called the exception object , including the type of error, where it occurred. A series of information such as program status. When a method throws an exception, the runtime looks for the exception