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Many times for the students in school learning, early know that knowledge changes the fate, only admitted to the university is a good way out. For Java programmers, technology is constantly updated, only in time to recharge, can not be eliminated by the market. What are some of the sizing tips that Java programmers lea

As we all know, the Java IDE is to help programmers to write and debug Java programs more easily, a good IDE has a lot of features, such as debugging, editing, switching views and so on.The IDE's choices involve many aspects, such as the nature of the project, the team's and business preferences, and so on, but for some basic requirements, every good IDE must be

1. Array turn ArrayListIn order to convert an array into a ArrayList, many Java programmers use the following code:Arrays.aslist does return a ArrayList object, but the class is a private static inner class in the Arrays class, not a common java.util.ArrayList class. This java.util.Arrays.ArrayList class has a method such as set (), Get (), contains (), but does not have any methods to add or remove element

of values. optional In fact, JAVA8 provides a more concise approach: optional Java is supported by the Optional type from the JAVA8 version, but it is already well known in the functional programming world. Prior to this, it had been used in Google guava for earlier versions of Java. 2. Ignoring anomalies We often ignore the anomaly. However, for beginners and experienced

Switching from Java to Ruby is a significant change for programmers. Rava makes this migration process a bit more comfortable.QuotesI can write Java in any language.--AnonInstallationTo install using gem:sudo gem install Jimmeirich-ravaUsageRequire ' Rava 'Easier console I/OThe difference between puts and print in Ruby is hard to remember. Real

system. However, since the. NET framework is skewed towards the Windows architecture some of the Java ' s JAR portability features M Ay have been sacrificed. Again, similar to JAR files, the assemblies too contain a entity called Manifest. However, manifest in the. NET framework plays somewhat wider role. Manifest is a metadata describing the inter-relationship between the entities contained in the assemblies like managed cod E, images and multimedia

Large-scale Java applications are built in the Linux environment. In the development environment, we can use Samba to map the cost of the network drive, directly in the Windows environment for programming debugging. But the final release is going to the Linux environment, and we have the Web server and database server application management (such as automated script publishing, etc.), application monitoring (Web services are normal, the use of MySQL d

as a Java programmer, the most painful thing is to choose too wide, can read too many books, often easily confused. I would like to choose some of the technical books I have read, according to the Order of study, recommend to everyone, especially those who want to constantly improve their technical level of Java programmers. One,

Program | programmer | Question A student once asked me a strange question he had seen at Sun's Forum, because this question has not been answered, and the knowledge involved in this problem is somewhat biased, so I assert that at least 98% of the Java programmers do not! (The reason for this assertion is that the pros and the low hand programmers I met seem to

stages 1. Will do, the direction will not be considered. (Robot-like) 2. Will consider how best to do, the direction will be a little consideration. (Like a child is about to become a grown-up, have independent thinking) 3. Direction can be considered, control, can use direction to flexibly guide how to do. (Vision, the idea of ascension to a high state, stand on the point of view of the giant, visionary to do things) finally who is stronger, see you the third stage of the level of how high, th

Become a learning process for Java programmers Become a learning process for Java programmers Learning any kind of knowledge is a process from scratch, Conlio knowledge to mastery. This process is a step-by-step process, there is no shortcut, but in the process of good learning methods, can make us less take some det

. Avoid synchronization2. Synchronize the interface with a synchronous wrapper3. If the method contains several important operations that do not require synchronization, do not synchronize the entire method4. Avoid unnecessary synchronization when reading and writing instance variables5. Use Notify () instead of Notifyall ()6. Use double check mode for synchronous initializationEfficiency1. Initialize with lazy2. Avoid creating unnecessary objects3. Reinitialize and re-use objects, try not to cr

the corresponding version of the Tomcat installation package from the official website, upload it to the server, and unzip it.1. See if there are any configuration environment variables in the/etc/profile file.2, modify the Tomcat conf directory under the Server.xml file, modify the http1.1 listening port changed to 80.3. Start the server tomcat under the bin directory./startup.sh4. Shut down the server tomcat in the bin directory./shutdown.sh5, check the port number by which end share populati

Now the programmer is more and more popular, many people choose to enter the programmer's team, but to be a good programmer must have a good habit.First, let yourself have a clear goal If a person is in the heart of the goal that day is like wasted. This is true in any industry. If you want to succeed in your Java career, you have to have a clear goal. For example, start with web development or desktop applications. In addition to their own learning t

.char variable?Save Unicode to save Chinese characters20. Start a thread with run () or start ()?Start ();Run () put the executed code insideThird, intermediate simple answerWhat is the difference between 21.sleep () and wait ()?Sleep to the time to wake upWaiting to wake up22.JDBC How do transactions work?Set JDBC Auto-commit false to open transactions after multiple transactions commit exception rollback rollbackHow do I access the database in 23.Java