Thanks to the Java Archive (JAR) file included in the Google Web API Developer's Kit, programming the Google API in Java couldn't be simpler. The googleapi.jar archive includes com.google.soap.search, a nice, clean wrapper around the underlying Google SOAP, along with the Apache Software Foundation's open source Crimson (http://xml.apache.org/crimson) XML parser and Apache SOAP (http://xml.apache.org/soap/) stack, among others.
Save the following code to a file called Googly.java:
// Googly.java // Bring in the Google SOAP wrapper. import com.google.soap.search.*; import java.io.*; public class Googly { // Your Google API developer's key. private static String googleKey = "insert key here"; public static void main(String[] args) { // Make sure there's a Google query on the command line. if (args.length != 1) { System.err.println("Usage: java [-classpath classpath] Googly <query>"); System.exit(1); } // Create a new GoogleSearch object. GoogleSearch s = new GoogleSearch( ); try { s.setKey(googleKey); s.setQueryString(args[0]); // Google query from the command-line s.setMaxResults(10); // Query Google. GoogleSearchResult r = s.doSearch( ); // Gather the results. GoogleSearchResultElement[] re = r.getResultElements( ); // Output. for ( int i = 0; i < re.length; i++ ) { System.out.println(re[i].getTitle( )); System.out.println(re[i].getURL( )); System.out.println(re[i].getSnippet( ) + "\n"); } // Anything go wrong? } catch (GoogleSearchFault f) { System.out.println("GoogleSearchFault: " + f.toString( )); } } } Be sure to drop in your own Google developer's key in place of insert key here, like so:
// Your Google API developer's key. private static String googleKey = " 12BuCK13mY5h0E/34KN0cK@ttH3Do0R ";
To successfully compile the Googly application, you'll need that googleapi.jar archive. I chose to keep it in the same directory as my Googly.java source file; if you put it elsewhere, adjust the path after -classpath accordingly.
% javac -classpath googleapi.jar Googly.java This should leave you with a brand new Googly.class file, ready to run.
Run Googly on the command line ["How to Run the Hacks" in the Preface], passing it your Google query, like so under Unix and Mac OS X:
% java -classpath .:googleapi.jar Googly " query words " and like so under Windows (notice the ; instead of : in the classpath):
java -classpath .;googleapi.jar Googly " query words "
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