java coding practice

on the Java Practice report, overall is not difficult, for me the biggest difficulty lies in the use of the collection, which also shows my seventh chapter and even the overall use of Java is not good, the seventh chapter because of the lack of proficiency because the code volume does not knock much, many things do not understand, The use of double-row sets and s

MyBusinessException("A message that describes the error.", e); }} Therefore, only when you want to handle the exception to capture, otherwise only need to declare in the method signature let the caller to handle.9. Do not discard the original exception when packing the exceptionCapturing standard exceptions and wrapping them as custom exceptions is a common practice. This allows you to add more specific exception information and be able to

Each Java object has a hashcode () and Equals () method. Many classes ignore (Override) default implementations of these methods to provide deeper semantic comparability between object instances. In the Java Philosophy and Practice section, Java Developer Brian Goetz introduces you to the rules and guidelines you shoul

Java Theory and Practice: block memory leakage with weak referencesWeak references make it easy to express object lifecycle relationships. Document options

Java Drp project practice-Environment Building Summary To start a Java project development, we need to build a Java Development Environment. What do we need to build a Java Development Environment, what are the precautions. Process First, let me list the software I us

,jni_version_1_4)!=JNI_OK){return-1;}Jclass jthiz = Env->findclass (ClassPath);if (Env->registernatives (Jthiz,methods,sizeof (methods)/sizeof (Methods[0])) {return-1;}return jni_version_1_4;}As can be seen from the above code, the JNI layer through the Pthread library to complete the creation of threads, it is important to note that the JNI layer of the thread, must be through the global JAVAVM to get to the environment variables, but also through the global jobject to get the

constructor is set to private, default, or protected level.　　Four Serialization compatibility for different versions of serializable classesAny class that implements the Serializable interface has a static variable that represents the serialized version identifier:Private static final long serialversionuid;The value of the above serialversionuid is generated automatically by the Java Runtime Environment based on the internal details of the class. If

Scala, inheriting a base class is similar to Java, with a two-point limit, and (1) Overriding the method requires the Override keyword, (2) only the primary constructor can pass parameters to the base class constructor. Markerfactory is a single case, once the definition is complete, its name represents the only instance of the singleton object, and the singleton can be passed to the function as if it were a typical passing instance.

Telescopic Content: Synchronized Quick Review The improvement of the synchronized Compare the scalability of Reentrantlock and synchronized Condition variable It's not fair Conclusion Resources About the author The evaluation of the paper Related content: Java Theory and Practice series Synchronization is not the enemy Reducing contention IBM developer Kits for the

Java handles a little practice of excel in the accumulationTong Liang Date: 2008-11-061 Document DescriptionPurpose: The main purpose of this document is to share with you how to work with Excel in Java, part of the code from the Enterprise project management system V2.0 Source, part of the copy online.Background: Colleagues working with the Windows operating sys

Java5 adds a new class library concurrency set Java.util.concurrent, which provides rich APIs for concurrent programs that are easier and more flexible in Java 5. This article through a network server model, to practice JAVA5 multithreaded programming, the model used in the JAVA5 thread pool, blocking queues, can be reset locks, but also practice callable, future

In the previous article on the LIBSVM process and the simple Java code test to explain, this article is simple to libsvm how to practice in the project short description, inappropriate places welcome you to correct.The first step is to adjust the predictive function of LIBSVM, and I'm taking some of the code from the Svm_predict class to make predictive defenses, the code is as follows:/*** Classify incomin

://gitee.com/BESTI-IS-JAVA-2018/20165325.git4. Related refactoring shortcut key content summary:快速调取一个方法：Ctrl+Alt+M快速提取常量：Ctrl+Alt+C 快速提取变量：Ctrl+Alt+V快速提取成员变量：Ctrl+Alt+F快速更改类名：Shift+F6Agile development and XP practice four experimental requirements: in pairs to complete the Java cryptography related content learning, combined with refactoring, git, code standards

application of this pattern is exceeded, it will become very difficult to combine these two competing synchronization mechanisms. Conclusion Compared with the lock, the volatile variable is a very simple but fragile synchronization mechanism that will provide better performance and scalability than the lock in some cases. If you strictly follow the volatile usage conditions-that is, variables are truly independent from other variables and their previous values-in some cases, you can usevolatile

Address: http://blog.csdn.net/kongxx/article/details/7259837 One of Java Socket practices: Single-thread Communication Java Socket practice 2 multi-thread Communication Java Socket 3 transmission object Java Socket practice