invalid descriptor index in java

File Descriptor   when an application requests to open or manipulate a file, the operating system sets a list of files for the application, which is not described in detail here the operating system will provide you with a nonnegative integer, as an

Deep understanding of Java Virtual Machine notes-class loading process, deep understanding of virtual machinesI. LoadingThe Loading stage is a stage of the Class Loading process. In the loading phase, the virtual machine must complete the following

2nd Chapter Java memory area and memory overflow exception 2.1 OverviewWhy you should understand memory management. Because Java programmers give memory control rights to the Java virtual machine, if there is a memory leak and overflow problem,

http://blog.csdn.net/silentbalanceyh/article/details/5252280 (This chapter will talk about a more important chapter in Java, here to say sorry, because the reason for the recent change of work, there has been no time to continue writing tutorials,

We all know that the Java compiler is responsible. compile java files. the class file stores Java bytecode and. java files are irrelevant (as long as you are willing to write a compiler, you can also compile the source code written in other

The zygote process is initiated by the first process Init of the Android system. The init process starts when the kernel is loaded and, during startup, it reads a script file init.rc the root directory so that other processes that need to boot up

MySQL environment variable settings (Windows environment) 1, for Command control, in the CMD command downstream operation is very convenient, but sometimes need to directly in the command line bed empty execution mysql Such a command, there will be

Two classes are frequently used in the faces API. One is facescontext and the other is externalcontext. First, we will explain how to use facescontext. For each JSF request, the facesservlet object obtains a javax. Faces. context.An instance of the

1. Define the header and root element The deployment descriptor file, like all XML files, must start with an XML header. This header declares the XML version that can be used and provides the character encoding of the file.The DOCYTPE statement must

This article is reprinted and pasted here to facilitate searching for some commands. From: http://blog.csdn.net/canfengxiliu/article/details/20144119 --------------------- Disclaimer: This article is based on the notes written by .   Dalvik Command