core java volume 1

Java EE was originally in the browser and the client machine. At the time, many people questioned whether it was suitable for server-side development. Now, with the increase in Third-party support for the JAVA2 platform Enterprise version, Java is widely accepted as one of the preferred platforms for developing enterprise server-side solutions. The Java EE pla

each thread will share the program's memory Space (code snippets, data segments, heap space) and process-level resources (such as open files), but each thread has its own stack space.At the operating system level, the process is the basic unit of the program's operation, and in a process there are often multiple threads that do not interfere with each other concurrently. So why use multithreading?The advantages of using multithreading are:1. Using mu

0000,Which means 128 is 1000 0000 in the computer,The integer.tohexstring parameter is int, and if you do not 0xff, then when a byte is converted to int,Since int is 32 bits, and byte has only 8 bits, this will be the complement.For example, the decimal number of the complement 11111111 is 1 to int when converted to 11111111111111111111111111111111 many 1 ah, hehe!That is 0xFFFFFFFF but this number is wron

Java decompiler,: http://java.decompiler.free.fr/jd-gui/#downloads, the latest version is 0.2.8, written in C ++, support Ms, Mac, Linux three OS, the function is as follows:1. Supports compiling the entire jar file. In this way, the compiled file can be associated with the Lib jar package in eclipse to facilitate viewing the source file.2. Quick source file searching: Ctrl + Shift + T3, 2. Support for deco

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More books can be found at book.1eduyun.com.JAVA core technology Volume 2: advanced features (original book version 8th) JAVA software development from novice to master (Java from entry to master (version 3rd) + Java project development full record (version 3rd ))

First of all, talk about my understanding of the Java platform, Java itself is an object-oriented language, notable features have two aspects, one is called "write once, run everywhere", it is very easy to get cross-platform capabilities, but also garbage collection (GC), Java through the garbage collector to reclaim the allocation of memory, In most cases, progr

() {return NewFinalizabledelegatedexecutorservice (NewThreadpoolexecutor (1, 1, 0L, Timeunit.milliseconds,NewLinkedblockingqueue())); }The point is that there are 5 parameters, namely the number of core threads, which is the number of threads needed in the thread pool at startup, and if set allowscorethreadtimeout, then the

Multi-line threads for other Java knowledge points, there is a certain threshold for learning, and it is more difficult to understand. In peacetime work if improper use will appear data confusion, inefficient execution (as a single-threaded to run) or deadlock program hangs and so on, so mastering the understanding of multithreading is critical.From the beginning of the basic concept to the final concurrency model, this paper explains the knowledge of

Classes are loaded:　　Refers to reading the binary data of a class file into the runtime data area (the JVM is partitioned in memory)and creates a class object within the method area.Class Loader:Responsible for loading the compiled class file (bytecode file) into the JVM (Java Virtual machine).The class loader is mainly divided into the following types:1.Bootstrap class loader (boot class loader)Responsible

Android Ril-javaRil-java is essentially a RIL agent that plays a forwarding role and is the starting point of the phone system in the Android Java conceptual space. In Ril-d's analysis, we know that Rild set up a listening socket interface, waiting for Ril-java connections. Once the connection is successful, Ril-java c