我在一個新的線程(實現可運行的類,如下所示)中拉動rss提要我想使用從rss提要得到的字符串並將它們返回到主類。主類只是運行的線程像這樣如何從線程返回值
new Thread(new RssParse()).start();
我有一個很艱難的時期設法返回這些字符串中切出XML到主類。任何幫助表示感謝。
public class RssParse implements Runnable {
private static final String MY_DEBUG_TAG = "pfaff";
public void run(){
System.out.println("1");
URL iotd;
try{
iotd = new URL("http://www.nasa.gov/rss/image_of_the_day.rss");//set URl
BufferedReader in;//new BufferedReader
in = new BufferedReader(new InputStreamReader(iotd.openStream()));//get rss
XmlPullParserFactory factory;
factory = XmlPullParserFactory.newInstance();//new factory
factory.setNamespaceAware(true);
XmlPullParser xpp;
xpp = factory.newPullParser();
xpp.setInput(in);
int eventType;
eventType = xpp.getEventType();
System.out.println(eventType+"!!!!!!!!!!!!!!!!");
while(eventType!=XmlPullParser.END_DOCUMENT){
switch(eventType){
case XmlPullParser.START_DOCUMENT:
break;
case XmlPullParser.START_TAG:
String tagName=xpp.getName();
System.out.println(tagName+" "+xpp.getDepth());
if(tagName.equals("title")&& xpp.getDepth()==4){//depth is specific to this certain rss feed, there are multiple tags with the same names
String title=xpp.nextText();// I want to return title and a few other strings but can't figure out how to do this when dealing with threads.
System.out.println(title);
}
break;
}
eventType=xpp.next();
}//switch
in.close();//close BufferedReader
} catch (MalformedURLException e){
e.printStackTrace();
}catch(XmlPullParserException e1){
e1.printStackTrace();
}catch(IOException e2){
e2.printStackTrace();
}
}//method
}//class
在Java 5中,您將使用「Future」。請參閱[這裏](http://docs.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/Future.html)。 – OldCurmudgeon 2012-07-12 00:29:28