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A subclass can call a constructor defined by its superclass by use of the following form of super: super(arg-list); Here, arg-list specifies any arguments needed by the constructor in the superclass super( ) must always be the first statement executed inside a subclass constructor To see how super( ) is used, consider this improved version of the BoxWeight( ) class:

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Performance degradation can be minimized by using a publisher-consumer database design for applications where rows are frequently inserted, deleted, or modified, as in an order processing system The publisher-consumer database design consists of two or more databases that contain the same information One database, called the publisher, receives requests from the J2ME application to insert a new row, modify, or delete an existing row J2ME applications don t use the publisher to retrieve information, therefore the publisher database isn t indexed A consumer database receives instructions to insert a new row, modify, or delete an existing row from the publisher However, the consumer receives requests for information from a J2ME application Therefore, the consumer database is indexed Once the publisher passes data to the consumer, the publisher is free to process the next incoming data, during which time the DBMS is updating the consumer s indexes There are two major benefits to this design First, a bottleneck is avoided when many requests are received by the DBMS to insert new information or update existing information This is because the publisher has two tasks to perform: insert or modify the database, then pass along those changes to the consumer The other benefit is that the database becomes scalable This means that the database can be adjusted to handle an increased volume of requests Let s say a company begins with a publisher and one consumer Over time there is an increase in the number of requests for information, which can overwhelm the DBMS and cause performance degradation This can be remedied by creating a second consumer and routing requests to one or the other consumer, reducing response time by half

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It's an easy task to use Visual Basic . NET code to scan QR Code barcodes from a image file. One line free VB code can achieve this. With this simple VB code , you can read and output all QR Code barcodes data in " qrcode - vbnet .gif" image file at a time.

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// BoxWeight now uses super to initialize its Box attributes class BoxWeight extends Box { double weight; // weight of box // initialize width, height, and depth using super() BoxWeight(double w, double h, double d, double m) { super(w, h, d); // call superclass constructor weight = m; } }

Here, BoxWeight( ) calls super( ) with the arguments w, h, and d This causes the Box( ) constructor to be called, which initializes width, height, and depth using these values BoxWeight no longer initializes these values itself It only needs to initialize the value unique to it: weight This leaves Box free to make these values private if desired In the preceding example, super( ) was called with three arguments Since constructors can be overloaded, super( ) can be called using any form defined by the superclass The constructor executed will be the one that matches the arguments For example, here is a complete implementation of BoxWeight that provides constructors for the various ways

16 Make Predictions As the amount of business conducted online continues to increase, how important will Web site privacy and security issues be in the future

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Open Source library: http://www.codeproject.com/KB/cs/ qrcode .aspx. Paid library: ...

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[Solved] how I can read a QR code in Visual Basic or C # using a ...
See similar post: QR Code Scanner in ASP. Net [^]. Quote: QR Code Library 1.3[^] is a . NET component that can be used to encode and decode ...

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