thread

When the design was launched in Java 1.2, a new support was introduced in the Java platform: java.lang.ThreadLocal, which provided us with a new option when writing multithreaded programming. This tool class can be very concise to write a graceful

Program A complete Java application that usually has at least one end point for the application. For a general program, the system developer ends the program at the end of the program by adding System.exit (0), or System.out (-1), depending on the

Program Blink of an eye a year again, oneself again old one year old, depressed ah. Take advantage of some Zhong Cai New year, and quickly send a few more articles to add something to the past year. The program is found from the Internet and is a

The Java rules described in this article are divided into 3 main levels, this article abandoned the peacetime development of the situation rarely encountered, those who use less later in the high-level chapter appears. And there are six useful

Program   Use Java Development Program, the issue always need to consider is how to install the JRE on the user's machine. There are a lot of questions to consider: whether the user has the ability to install the JRE on their own, whether the user

Programming | data In the information age, the application of network technology has been very common. Many of these applications rely on the ability to send the same information from one host to multiple hosts or from multiple hosts, and the number

Cubbyhole example the class Cubbyhole (Listing 8.9) simulates a cubbyhole. A cubbyhole is a slot this can have only one item in it. One thread puts an item into the slot and another thread takes it out. The thread blocks until the slot is available,

Program A large number of functions are encapsulated in the Java API for use when writing a network communication program.This enables Java to have a powerful network capability.Using Java to write a TCP communication program is simpler, but there

Programming | Network v. Displaying other HTML documents on the network Use Java-provided getAppletContext (). showdocument (URL) to An HTML document that displays other nodes, and an image of the other nodes in the previous display

Discussion and application of Java threads Longs One, why to study and use the thread In general, the programs that the computer is executing are called processes (process), the processes have different address spaces, and are different programs

2) flow control and exception handling Objective 1) The Write code using if and switch statements and identify legal argument types for these statements. · Unreachable statements produce a compile-time error. while (false) {x = 3;}//won ' t compile

Key_buffer_size -This is very important for the MyISAM table. If you are using only the MyISAM table, you can set it to the 30-40% of available memory. A reasonable value depends on the size of the index, the amount of data, and the load.Remember,

Tuning log switching (tuning log switches) Log switching: The LGWR process stops writing logs to the current log file, closes the log file, opens a new log file, and writes the data from the log cache to the new log file. Log switching can

--Monitor whether the index uses ALTER index &index_name monitoring usage; Alter index &index_name nomonitoring usage; SELECT * from v$object_usage where index_name = &index_name; --To find the I/O distribution of data files Select

Many times, performance diagnostics on a database can be done using SQL tracking, and some information is then parsed in the trace file. In general, we can set up the SQL Trace by initializing the parameter sql_trace=true. We can also

Data | database -------------------------------------------- Experimental environment: WINDOWS + Oracle 10.1.0.2.0 Original database: ning[archive mode] Copy database: Test Author:ningoo 2005-3-27 -----------------------------------------

Server Author: Song Lihuan [Guide: The basic theory of locks used in various large databases is consistent, but there are differences in concrete implementations. SQL Server is more focused on managing locks by the system. When the user has the SQL

There are many reasons for the slow server| optimization query, common as follows: 1, no index or no index (this is the most common problem of query, is the defect of program design) 2, I/O throughput is small, resulting in a bottleneck effect. 3.

server| security | Stored procedures SQL Server extended stored procedures, in fact, is a common Windows DLL, but in accordance with some of the rules to implement some functions. When writing an extended stored procedure recently, there are some

web| sites can cause Web sites to fail for many reasons, which makes it difficult to systematically check all problems. The following is a central analysis of the most common problems that cause Web site crashes. If these conventional issues can be