英文:
I can't throws Exception and IOException in Java
问题
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
public class JsoupTest {
public static void main(String[] args) throws IOException {
final Document document = Jsoup.connect("http://en.wikipedia.org/").get();
final Elements newsHeadLines = document.select("#mp-itn b a");
for(Element headline : newsHeadLines) {
System.out.println(headline);
}
}
}
- 我在哪里找到这个依赖？
- 我该如何查找依赖？因为我已经在 Maven 仓库中查找过，但没有找到。
- 即使对于上面我展示的
System.out.println方法，编译器也报错，为什么会这样？ - 编译器报错了，我在下面展示了，错误信息为
foreach not applicable to type 'org.jsoup.select.Elements'，为什么会出现这种情况？
感谢您提供的所有答案。我不想直接获得依赖项，我想知道其中的原因。谢谢。
英文:
I can't throws Exceptions such as IOException and Exception. I need to add dependencies of these but I couldn't find it.
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException; > It throws error: Cannot resolve symbol 'java' - Add Maven dependency
public class JsoupTest {
public static void main(String[] args) throws IOException { > Cannot resolve symbol 'IOException'
// download the HTML from wikipedia and parses it
final Document document = Jsoup.connect("http://en.wikipedia.org/").get();
// Select a bunch of a tags
final Elements newsHeadLines = document.select("#mp-itn b a");
// Prints to console
for(Element headline : newsHeadLines) { > foreach not applicable to type 'org.jsoup.select.Elements'
System.out.println(headline); > Cannot resolve symbol 'System'
}
}
}
My question can be basic but I'm pretty new on this sorry. If you give my answer please add these:
- Where did you find this that dependency?
- How can I find dependencies, because I checked Maven repository but I couldn't find.
- Compiler throws error even for System.out.println method as I showed above, why is that?
- Compiler throws error which I showed on belove,
foreach not applicable to type 'org.jsoup.select.Elements'
Thank you for your all answers. I don't want directly dependency. I want it to know why. Thanks
答案1
得分: 0
你不需要添加依赖项来使用 IOException 或者 System。
你可能没有正确使用编译器，或者你的集成开发环境显示了不存在的错误。
英文:
You do not need to add a dependency to use IOException or System.
You probably did not use the compiler correctly or your IDE shows non-existent errors.
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