Java Eclipse 错误无法解析为类型
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Eclipse errors cannot be resolved to a type
提问by Ryan Sisson
import java.awt.List;
import java.util.LinkedList;
import java.util.ListIterator;
public class HW1 {
public static void main(String[] args){
String s = "";
boolean flag = false;
int pos = -1;
List roster = new LinkedList(); <--
roster.add ( "alice" );
roster.add ( "bob" );
roster.add ( "chad" );
roster.add ( "dan" );
ListIterator<String> bookmark = roster.listIterator(); <--
try {
s = bookmark.next();
s = bookmark.next();
s = bookmark.next();
s = bookmark.next();
s = bookmark.next();
flag = bookmark.hasNext();
pos = bookmark.nextIndex();
}catch ( Exception trouble ) {
s = "Runtime Error generated";
}
}
}
This is considered a homework question, however I'm not looking for an answer. I'm getting multiple errors about resolving to a type, at the first error I get LinkedList and List cannot be resolved to a type. At the second arrow I get ListIterator cannot be resolved to a type.
这被认为是一个家庭作业问题，但我不是在寻找答案。我在解析为类型时遇到多个错误，在第一个错误中我得到 LinkedList 和 List 无法解析为类型。在第二个箭头处，我得到 ListIterator 无法解析为类型。
I am very new to Eclipse and we haven't done any code writing yet for this class so I am not used to the format Can anyone tell me how to resolve the errors I am getting
我对 Eclipse 非常陌生，我们还没有为这个类编写任何代码，所以我不习惯这种格式 谁能告诉我如何解决我遇到的错误
Updated* Same errors as before except I now have 3 more. List and LinkedList are a type mismatch, LinkedList is a raw type and references to a generic type need to be parameterized. then the second arrow I now get listIterator() is undefined for the type
更新* 与以前相同的错误，除了我现在还有 3 个。List 和 LinkedList 是类型不匹配，LinkedList 是原始类型，对泛型类型的引用需要参数化。那么我现在得到的第二个箭头 listIterator() 是未定义的类型
采纳答案by Matt Clark
List roster = new LinkedList();
needs to become:
需要变成：
LinkedList roster = new LinkedList();
回答by Hai
List is generic type, so you need to declare it as
List 是泛型类型，因此您需要将其声明为
List<String> myString = new LinkedList<String>();
回答by lem
Have you imported the libraries at the beginning of your program?
您是否在程序开始时导入了库？
import java.util.List;
import java.util.LinkedList;
import java.util.ListIterator;
回答by Dai Nguyen-Van
I have the same problem and it take me a long time. Finally, I found that the lack of a close bracket "}". i think this issue is a syntax error.
我有同样的问题，需要很长时间。最后，我发现缺少一个右括号“}”。我认为这个问题是一个语法错误。
