Java

The user access control mechanism is always discussed in terms of coarse-grained and fine-grained two aspects: Coarse-grained control: You can provide access to a layer of an entire object or group of objects, while fine-grained control is always

In most cases, a Java application is either an EE application or a J2SE application, and it is entirely separate from this point. The Java EE application requires the services of the Java container, and the container implements a long list of

Debugging in a multithreaded environment is a problem for developers to get headaches. Debugging a program in the IDE by adding breakpoints often misses the execution of other threads because it stops at a breakpoint on one thread, and scheduling

When handling exceptions, you should distinguish between checked exceptions and unchecked exceptions. For checked exceptions, we should provide robust exception recovery mechanisms, and for unchecked exceptions, this is a programming error, a bug,

For Java™ developers who learn Scala, objects are a relatively natural, simple entry point. In previous installments of this series, I introduced some of the object-oriented programming methods in Scala, which are actually not very different from

Keytool is a security key and certificate management tool. It manages a keystore (quite a database) of the associated X.509 certificate chain that stores the private key and verifies the corresponding public key. Keytool is an effective security

This article is the first part of the Java.next series. In this part, I will explore the common characteristics of the language as Java.next. I chose four languages as representatives of "Java.next": Clojure,groovy,jruby, and Scala. At first glance,

Empty pointers are everywhere! Of all the exceptions that a Java programmer can encounter, a null pointer exception is the scariest, because it is the least informative exception the program can give. For example, unlike a class transition

J2SE 1.5-code-named Tiger-is scheduled for release at the end of 2003. I've always been interested in collecting as much information about upcoming new technologies as possible, so I'm going to write a series of articles about the new and

Glass box scalability refers to a way in which a software system can be extended when the source code can be viewed without modification-it is a tradeoff between the black box design (where the extension is built, the original code is not viewed)

Security has been the basic component of the Java platform from the early so-called Java sandbox to the robust, full-featured security architecture introduced by JDK 1.4. From then until now, the designers of the Java language received a lot of

This article describes a technique for rewriting (override) the Equals method. Using this technique, you can still meet the conventions of the Equals method even when the subclass of the entity class adds a new field (field). In the 8th of the book

Translator: You might think Java is very simple, the equals implementation of object will be very simple, but the fact is not what you think, after reading this article patiently, you will find that you know so little about Java. If this article is

Introduction Java's heap is a run-time data area in which instances (objects) of the class allocate space. The Java Virtual machine (JVM) heap stores all objects that are established by the running application, which are established through

Overview With Java JSSE (Java Secure Socket Extension) technology, we can easily write Secure Sockets program, about JSSE introduction, you can see the Oracle Web site provides JSSE guidance. In the process of programming, we need to apply the

Java executes remote shell scripts via the SSH2 Protocol (GANYMED-SSH2-BUILD210.JAR) Use the following steps: 1. Guide Package Website Download: http://www.ganymed.ethz.ch/ssh2/ MAVEN Coordinates: com.ganymed.ssh2 ganymed-ssh2-build

Profile We want to start a development of Java projects, then we need to build a Java development environment, then build a Java development environment, what needs, and what to note. Process Let me first make a list of the software and software

Be prepared to take a moment to read the Java code in the Java.util.concurrent package, which I personally think can be roughly divided into five parts (if there is a mistake, I also want to correct it). First part aomic data type This section is

In the process of locating a domain name through DNS, it is possible to pass through several intermediate DNS servers to find the specified domain name, so locating the domain name on the DNS server is a very expensive operation. In Java, DNS

Java Container class Java silently looking under the rain 1. OverviewThe Java Container class's JDK provides classes for saving objects . It hides specific implementations (arrays, linked lists), including commonly used data structures: collections,