举一反三
- 若通过List<br/>list = new List(); 创建的列表框,如何获得该列表框中当前选中的列表项(<br/>)。 A: list.getSelectedIndex() B: list. getSelectedItem( ) C: list. getItem (i) D: list. select (i)
- In a singly linked list which operation depends on the length of the list.( ) A: Interchange the first two elements of the list B: Delete the first element of the list C: Add an element before the first element of the list D: Delete the last element of the list
- Kesi is not only on the national list of intangible cultural heritage but also on the UNESCO Intangible Cultural Heritage list.
- Which one of the following is not a characteristic of the linked list? A: The node in a linked list can be accessed randomly B: Inserting or deleting a node in a linked list do not need to move the other nodes C: Don't have to estimate storage space in advance D: The memory space required by a linked list is in proportion to the length of the list.
- In a doubly linked list, each node has links to the previous and next nodes in the list. A: 正确 B: 错误
内容
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使用Java代码实现从表table中取出所有数据信息,代码如下(假设可以直接调用数据库连接conn),下面对代码描述正确的是( )。(选择一项)public List getInfo(){List list=new ArrayList();String sql=“select * from table1”;PrearedStatement pst=();Result rs=();If()){(1));}return list;} A: 返回list集合,包含一条信息 B: 返回list集合,包含所有数据信息 C: 程序发生编译错误,无法运行 D: 编译通过,运行时出错
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A<br/>stack is a special type of linked list in which objects can only be<br/>added to and removed from the top of the list.
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下列哪种方式创建的列表框允许选择多个列表项(<br/>)。 A: List list = new List() B: List list = new List(4) C: List list = new List(4, false) D: List list = new List(4, true)
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List some aspects of people's lives that have changed as a result of the development of digital technology.
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下面程序的运行结果为。 def swap(list): temp=list[0] list[0]=list[1] list[1]=temp list=[1,2] swap(list) print(list)