how to integrate barcode scanner into java application

architecture software Developer's Manual, the lock prefix command causes two things to happen under a multi-core processor:1. Writes data from the current processor cache row to system memory2. This write memory operation will invalidate the data cached in the other CPU's memory address.To improve processing speed, the processor does not communicate directly with the memory, but instead reads the system memory data first into the internal cache (L1,L

to build PublicBuilder (String name) { This. Name =name; } PublicBuilder Age (intval) { Age=Val; return This; } PublicBuilder Safeid (intval) {Safeid=Val; return This; } PublicBuilder Address (String val) {address=Val; return This; } PublicDodocontact Build () {//build, return a new object return NewDodocontact ( This); } } PrivateDodocontact (Builder b) { age=B.age; Safeid=B.safeid; Name=B.name; Address=b.address; }}Finally, the

, this method is raised on a closed Statement, or if a given SQL statement generates anything other than a single ResultSet objectexecuteupdateint Executeupdate (StringSQL) throwsSQLExceptionExecutes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement, or an SQL statement (such as a SQL DDL statement) that does not return any content. Parameters: Sql-sql Data manipulation LANGUAGE,DML statements, such as INSERT, UPDATE, or DELETE, or SQL statements that do not return any

the appropriate interface.The above two scenarios are actually from two angles to describe a class of problems, that is to access the method is not in the appropriate interface, one from the interface (is accessed), one from the access (active access).Interface Adapter Usage Scenarios:(1) To use one or some of the methods in the interface, but there are too many methods

consistent with the object adapter's usage scenario, which is only slightly different from the implementation, and is mainly used for the following scenarios:(1) If you want to use a class that already exists, but it does not conform to the existing interface specifications, resulting in the inability to access directly, creating an adapter can indirectly access the methods in this class.(2) We have a clas

It has been used more than C + +. Recent things have written a small program in Java. Find Java Toolkit A lot and easy to find, C + + Desktop Application Toolkit is not good.Java adds the external jar package to the project's BuildPath, C + + needs to compile the DLL or compile the source code together.Java operations

JAVA Card Application Development (ix) APDU the Mac checksum in the script commandThe terminal receives 71 or 72 scripts from the background, parses the script instructions, and sends out the cards.The card executes the script instruction and first verifies that the Mac,mac validation passes before the script is actually executed. Because scripts typically update

In the Java EE application development, the application and the database connection establishment is one of the problems that we often encounter. Here I talk about connecting Oracle databases through OCI, thin, and jdbcodbc bridges in local applications, iplanet

automatically call this method Object put (object Key,object value) Saves the object to a hash table with the given keyword, and the keywords and elements here are not nullable Object remove (Object key) Removes the object corresponding to the given keyword from the hash table if the object does not exist and returns null int size () Returns the size of the hash table String toString () Converting the contents of a

the wrong understanding:Some say, "Using the String.intern () method, you can save a string class to a global string table, and if a Unicode string with the same value is already in the table, the method returns the address of the string already in the table. If you do not have a string of the same value in the table, register your own address

Recently looking at design patterns, find a good blog, explaining the various design patterns in the Java specific application scenarios, Bowen address http://blog.jobbole.com/62314/. Structured mode: Adapter Mode: Used to transform an interface into another interface. Java.util.arrays#aslist () javax.swing.JTable (TableModel) Java.io.InputStreamReader (InputSt

Typical Java EE applications that use the O/R mapping tool face the problem of getting the data they need through the most streamlined SQL queries. Most of the time it's not easy to do. By default, the O/R mapping tool loads data on demand unless you change its default settings. Deferred load behavior ensures that dependent data is loaded only when it is actually requested, thus avoiding the creation of meaningless objects. Sometimes our business does

Introduction to the implementation principle and application of the atomic package in Java, javaatomic 1. Proposal of synchronization problems Suppose we use A dual-core processor to execute two threads A and B, one is to execute thread A, and the other is to execute thread B, both threads now need to add 1 to the member variable I of the object named obj. Assumi

declaration Serialversionuid, if possible, because such a declaration applies only to the direct declaration class-The Serialversionuid field is not useful as an inherited member. An array class cannot declare an explicit serialversionuid, so they always have a default computed value, but the array class does not have a requirement to match the Serialversionuid value.a way to generate Serialversionuid is documented below:1. Open the class in the IDE

Java notes -- Application of super-Class Object multithreading + combination of internal classes and multithreading In the dining algorithm of philosophersThe Object class is the parent class of all Java classes. It defines three methods related to thread operations, so that all Ja