你自己的类名也叫ArrayLIst,你new ArrayList其实是创建你自己定义的这个类，所以会报错。import java.util.List;另外ArrayList这个类名改一下不。。。类名换下，ArrayList不能用
二、出现The type List is not generic; it cannot be parameterized with arguments <String> 如果你的jsp页面中写了 List<Student> stuList = new ArrayList<Student>(); 系统可能默认给你导入 import java.swt.*; 包 此时需要将这个包改为 import java.util.*; 因为List是属于util包...
你需要把public ArrayList<T> getAll() 中的T换成具体的类名，例如 public ArrayList<String> getAll()
Acess an arraylist from another class? Activator.Createinstance for internal constructor Active Directory Error: Unknown Error (0x80005000) Active Directory problem: Check if a user exists in C#? Active Directory User does not assign User logon name and User Principal Name AD LDS cannot ChangePassw...
2. Create anArrayList ArrayListhas several constructors and we will present them all in this section. First, notice thatArrayListis a generic class, so you can parameterize it with any type you want and the compiler will ensure that, for example, you will not be able to putIntegervalues in...
Error: Type Arraylist is not defined Error: Validation (HTML5): The values permitted for this attribute do not include '1'. Error: Value was either too large or too small for an Int32. Error:received an invalid column length from the bcp client for colid 1 Error!!! : The ConnectionSt...
在定义:List<String> list=new ArrayList<>(); 时报错了 报的错误是: The type List is not generic; it cannot be parameterized with arguments <String> 后来发现原因是导包倒错了 把import java.awt.List;改成 import java.util.List;即可
A generic class can specify type variables as the types of its non-static fields, non-static method parameters, and local variables; and as non-static method return types. For example, ArrayList specifies type variable E as the type of its private transient E[] elementData field and as the...
public List<String> getStringList() { List<String> list = new ArrayList<>(); // 执行一些操作 return list; }3.2.2 squid:S3776@SuppressWarnings("squid:S3776")是Java语言中的一个注解,它被用于抑制一些特定的编译器警告。在这个特定的例子中,"squid:S3776"是一个特定的警告代码,这个警告代码通常来...
Using theCollectionsclasses as an example,ArrayList<E>implementsList<E>, andList<E> extends Collection<E>. SoArrayList<String>is a subtype ofList<String>, which is a subtype ofCollection<String>. So long as you do not vary the type argument, the subtyping relationship is preserved between th...