程序输出什么?List<String> tools = new ArrayList<>();tools.add("hammer");tools.add("nail");tools.add("hex key");System.out.println(tools.get(1));
A: hammer
B: hex key
C: nail
D: 以上都不是
A: hammer
B: hex key
C: nail
D: 以上都不是
举一反三
- 在自己建的原理图元件库文件中，要绘制一个新的元件符号，应执行（）命令 A: 在左边管理器窗口的Browse SchLib选项卡中单击【Add】按钮 B: Tools | Add Component C: Tools | New Component D: Tools | Next Component
- The use of key words searching tools is for us to search for and copy the product key words.
- Due to its good heat resistance ,when cutting with carbide tools, generally do not add cutting fluid
- The purchase of tools on account is recorded by a A: debit to Accounts Payable and a credit to Tools. B: credit to Tools and a credit to Accounts Payable. C: debit to Tools and a credit to Accounts Payable. D: debit to Tools and a debit to Accounts Payable.
- 定义变长数组list，其元素类型为整形对象，下面定义正确的是： A: List<Integer> list=new ArrayList<Integer>(); B: List<String> list=new ArrayList<String>(); C: List<Integer> list=new ArrayList<String>(); D: List<Float> list=new ArrayList<Float>();