Question

我试图按照这里的文档：https://github.com/yusuke/twitter4j/blob/master/twitter4j-examples/src/main/java/twitter4j/examples/tweets/ShowStatus.java但似乎在某处出错了。我试图做一些与文档略有不同的东西。我没有使用args，而是使用硬编码的用户名。这是令人不安的代码。

import twitter4j.Twitter;
import twitter4j.Status;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;

public class ChrisTwitter {
    public Status status;
    public ChrisTwitter (){
        Twitter twitter = new TwitterFactory().getInstance();
        try {
            Status status = twitter.showStatus(Long.parseLong("rye761"));
            System.out.println("@" + status.getUser().getScreenName() + " - " + status.getText());
        }
        catch (TwitterException e) {
            e.printStackTrace();
        }
    }
}

任何想法？哦，这就是我在控制台中得到的结果:(新的堆栈跟踪）

Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problems: 
    TwitterFactory.getInstance cannot be resolved to a type
    The method Page(int, int) is undefined for the type ChrisTwitter

    at com.github.ryebread761.lockergnome.ChrisTwitter.<init>(ChrisTwitter.java:16)
    at com.github.ryebread761.lockergnome.Base$CTListener.actionPerformed(Base.java:121)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.java:6375)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6140)
    at java.awt.Container.processEvent(Container.java:2083)
    at java.awt.Component.dispatchEventImpl(Component.java:4737)
    at java.awt.Container.dispatchEventImpl(Container.java:2141)
    at java.awt.Component.dispatchEvent(Component.java:4565)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
    at java.awt.Container.dispatchEventImpl(Container.java:2127)
    at java.awt.Window.dispatchEventImpl(Window.java:2482)
    at java.awt.Component.dispatchEvent(Component.java:4565)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:684)
    at java.awt.EventQueue.access$000(EventQueue.java:85)
    at java.awt.EventQueue$1.run(EventQueue.java:643)
    at java.awt.EventQueue$1.run(EventQueue.java:641)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:657)
    at java.awt.EventQueue$2.run(EventQueue.java:655)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:654)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

Answer 1

您正在尝试将字母数字字符串解析为long，并且抛出NumberFormatException：

Status status = twitter.showStatus(Long.parseLong("rye761"));

由于您没有在try-catch块中捕获NumberFormatException，因此异常会传播。为了防止这种情况，您应该在执行此操作之前验证您尝试解析的输入，或者为该NumberFormatException添加aditional catch。

修改

要获取用户的最新推文，您可以采用以下方法：

首先定义请求的分页。在这种情况下，每页只需要一页和一条推文（如果我没弄错的话，它将是最新的一页）。然后你直接发出请求，因为你正在咨询推文而你没有做任何其他事情，你不需要认证AFAIK。

Twitter latestTweetChecker = new TwitterFactory.getInstance(); Paging page = Page(1,1); List<Status> statusList = latestTweetChecker.getUserTimeline("rye761",page);

在那里，您将拥有所需的状态。只需使用corresponding methods获取所需信息。

Answer 2

Long.parseLong（ “rye761”）

即使parseLong的输入格式为String，字符串中的字符也必须是全部十进制数字，而rye761不是这种情况。所以，你得到了异常

字符串中的字符必须都是十进制数字，除此之外第一个字符可以是ASCII减号' - '（\ u002D'）来表示负值。

获得twitter4j状态会引发例外情况？

2 个答案: