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Figure 1-58. The coupling chart after the introduction of a Builder The chart shows that the Window and Decorator classes have a small amount of coupling, while the Builder has a large amount. The graph doesn t show coupling for the derived Decorator classes, because this example demonstrates coupling only on the parent class, which is the Window class. This presence of a Builder is often a good way to reduce parent-child coupling, because a Builder is usually an extremely simple class, containing little or no business logic, while the parent class is probably much more complex. In many cases, the Builder might interact with the child classes simply by calling their constructors and no other methods. According to Axiom 1, introduced at the beginning of the chapter, it is better for a simple class to be coupled than a complicated class. In some parent-child relationships, the parent and child can be of the same type. For example, a TreeNode class, used to represent the nodes of a UI Tree control, can act recursively as a parent to child nodes that are also TreeNode objects, as shown in Figure 1-59. java qr code reader for mobile New QR Code Reader Library - DZone Mobile
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Java QR code generator , zxing example, open source API to generate QR code in java program, zxing QR code generator example, dynamic QR code , google ... You can use the same SQL*Loader run to load into multiple tables. Here s an example that shows how to load data into two tables simultaneously: LOAD DATA INFILE * INSERT INTO TABLE dept WHEN recid = 1 (recid FILLER POSITION(1:1) INTEGER EXTERNAL, deptno POSITION(3:4) INTEGER EXTERNAL, dname POSITION(8:21) CHAR) INTO TABLE emp WHEN recid <> 1 (recid FILLER POSITION(1:1) INTEGER EXTERNAL, empno POSITION(3:6) INTEGER EXTERNAL, ename POSITION(8:17) CHAR, deptno POSITION(19:20) INTEGER EXTERNAL) In the preceding example, data from the same datafile is simultaneously loaded into two tables, dept and emp, based on whether or not the recid field value is 1. qr code scanner java app Generate custom QRCode with logo image using zxing - aboullaite.me
24 Aug 2017 ... At heart is it a pure Java library for decoding barcodes (the core/ and javase/ modules). ... It generate a QRCode 300x300 png image, that contains some ... and background colors (I use orange and white on this example ). qr code generator javascript Generate QR Code in java using zxing | CalliCoder
19 Jun 2017 ... In the next section, we’ll learn how to encode such data and generate the QR Code in Java . ... We’ll use Google’s Zxing library to generate QR codes for our application. Zxing, pronounced as Zebra Crossing, is an open source, multi-format 1D/2D barcode image processing library ... Here s a simple example of how you can trap the process error codes issued by SQL*Loader: $ sqlldr PARFILE=test.par retcode=$ if [[retcode !=2 ]] then mv ${ImpDir}/${Fil} ${InvalidLoadDir}/.${Dstamp}.${Fil} writeLog $func "Load Error" "load error:${retcode} on file ${Fil}" else sqlplus / ___EOF /* You can place any SQL statements to process the successfully loaded data */ ___EOF TreeNode 1 -children * SQL*Loader supports the XML data type for columns. If a column is of this type, you can use SQL*Loader to load the XML data into a table. SQL*Loader treats the XML columns as CLOBs. Oracle also lets you load the XML data either from a primary datafile or from an external LOB file. You can use fixed-length fields or delimited fields. The contents of the entire file could also be read into a single LOB field. java qr code reader webcam Free Qr Code Reader Nokia E63 Java Apps - Mobiles24
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26 Apr 2019 ... The QRGen library is hosted on Mulesoft maven repository. ... Using the fluent API, we can even generate a colorful QR code as shown below: ... For many years, Oracle DBAs used SQL*Loader almost exclusively for loading data into Oracle database tables from outside sources, employing either the conventional loading method or the directpath loading method Oracle s external tables feature goes one step further and enables you to use the SQL*Loader functionality to access data stored in operating system files without ever loading the data into a real Oracle table If your source data doesn t need any transformations when loading into the database, using the SQL*Loader to perform a conventional or a direct load is sufficient External tables complement the functionality of the SQL*Loader If you want to perform major data transformations before the load, then external tables are the recommended way to go Using the external tables feature, you can visualize external data as if it were stored in an Oracle table. When you create an external table, the columns are listed the same way as they are when you create a regular table However, the data fields in the external file are merely mapped to the external table columns, not actually loaded into them External tables don t actually exist anywhere, inside or outside the database The term external table implies that a given table structure is mapped to a datafile that s located in an operating system file When you create an external table, the only thing that happens in the database is the creation of new metadata entries in the data dictionary for the new table You can t change the datafile s contents in any way while you re accessing its contents from within the database. In Figure 1-59, coupling is obviously not a problem in this case, since there is only one class involved. android java qr code generator Java QR Code Generator - zxing example - JournalDev
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