JDBC Best Practices下载

weixin_39820780 2019-08-03 01:00:20

Sun Microsystems created JDBC in the 90s to be the standard
for data access on the Java Platform. JDBC has evolved since
that time from a thin API on top of an ODBC driver to a fully
featured data access standard whose capabilities have now
surpassed its aging brother, ODBC. In recent applications,

相关下载链接：//download.csdn.net/download/stone1116/4239944?utm_source=bbsseo

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（1）此项目会涉及到6个级别（每个级别是一个对象），所以先创建一个长度为6，类型为Level的数组，这个数组可以声明为静态常量值（2）使用有参构造方法创建6个Level类对象，并将这6个对象存储到第一步创建的数组中，可以将这个操作生命在静态代码块中 public final static Level levels[] = new Level[6]; static{ levels[0] = new Level(1,2,3,30,1); levels[1] = new Level(2,3,4,26,2); levels[2] = new Level(3,4,5,22,5); levels[3] = new Level(4,5,3,18,8); levels[4] = new Level(5,6,4,15,10); levels[5] = new Level(6,7,5,12,15); }

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