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1. Preface Try...catch...finally I'm afraid it's a familiar statement, and it's very simple to use, logically it seems to be easy to understand. However, I personally experience the "lesson" tells me that this thing is not as simple as the
1. Background Introduction
Why do you want to do exception handling?
For a computer program, no one can guarantee that it will run without error, the main source of error is the following:
Code Error
User illegal input
Device errors
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.Java describes
The abnormally large classification is divided into detection anomaly (checked exception) and non-detectable anomaly (unchecked exception). The detection exception is the exception that can be found in the compiler.
Non-detectable anomaly also
SLF4J 1.6.0 Previous version, if you print the exception stack information, you must use theLog.error (String msg, throwable t)Log.info and other corresponding methods.If MSG contains variables, MSG is generally formatted with the String.Format
Sometimes people don't pay attention to these details, but this knowledge is certainly useful, especially if you are writing a library related to testing or errors. This week, for example, there was an amazing pull Request in our chai, which greatly
http://blog.csdn.net/freshui/article/details/9456889The printing stack is a common method of debugging, in general, when the system is abnormal, we can print out the stack of abnormal cases, so it is very convenient to find errors. There is actually
A Java exception architecture
Java.lang.Object----java.lang.Throwable--------Java.lang.Exception------------java.lang.RuntimeException--------Java.lang.Error------------Java.lang.ThreadDeath
The Throwable class is a superclass of all errors or
"0" README0.1) This article describes + source code is transferred from core Java Volume 1, to understand Java exception-catch exception + throw exception and exception chain of knowledge;"1" catches exception related1.1) If an exception occurs
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