Programmer Think

Level 1: specify the type of JDBC encapsulation Task description This task: encapsulate a JDBC tool class as required. Relevant knowledge In order to complete this task, you need to master the basic use of JDBC. Please refer to the previous training content Advanced features of Java - JDBC (Part 1). This chapter will encapsulate ...

Level 1: Learning - object array of Java classes and objects Task descriptionRelevant knowledgeProgramming requirementsTest description Task description This related task: define a Dog class and create three Dog objects by using object array. Relevant knowledge The so-called object array means that it contains a group of related objects. W ...

Level 1: structural design of QR code business card page Relevant knowledge In order to complete this level task, you need to master: 1 Define table settings, 2 Span label. Definition list Definition lists are often used to explain and describe terms or nouns. Unlike unordered and ordered lists, the list items of a definition list do not ...

CSS3 selector - property selector Level 1: CSS3 - related concepts of property selector Customs clearance knowledge 1,Of the following options, the attribute selector is( C) A,div>span{color:red;} B,#box{color:red;} C,span[id]{color:red;} D,span{color:red;} 2,The style rules are as follows: p[class $= en]{font-weight:bold;} The style ...