?? aggregator.java
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import java.io.*;
import nu.xom.*;
public class Aggregator {
public String[] title = new String[15];
public String[] link = new String[15];
public int count = 0;
public Aggregator(String rssUrl) {
try {
// retrieve the XML document
Builder builder = new Builder();
Document doc = builder.build(rssUrl);
// retrieve the document's root element
Element root = doc.getRootElement();
// retrieve the root's channel element
Element channel = root.getFirstChildElement("channel");
// retrieve the item elements in the channel
if (channel != null) {
Elements items = channel.getChildElements("item");
for (int current = 0; current < items.size(); current++) {
if (count > 15) {
break;
}
// retrieve the current item
Element item = items.get(current);
Element titleElement = item.getFirstChildElement("title");
Element linkElement = item.getFirstChildElement("link");
title[current] = titleElement.getValue();
link[current] = linkElement.getValue();
count++;
}
}
} catch (ParsingException exception) {
System.out.println("XML error: " + exception.getMessage());
exception.printStackTrace();
} catch (IOException ioException) {
System.out.println("IO error: " + ioException.getMessage());
ioException.printStackTrace();
}
}
public void listItems() {
for (int i = 0; i < 15; i++) {
if (title[i] != null) {
System.out.println("\n" + title[i]);
System.out.println(link[i]);
i++;
}
}
}
public static void main(String[] arguments) {
if (arguments.length > 0) {
Aggregator aggie = new Aggregator(arguments[0]);
aggie.listItems();
} else {
System.out.println("Usage: java Aggregator rssUrl");
}
}
}
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