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import java.net.URL;
import java.net.URLConnection;
public class MainClass {
public static void main(String args[]) throws Exception {
URL u = new URL("http://www.java2java.com");
URLConnection uc = u.openConnection();
for (int j = 1;; j++) {
String header = uc.getHeaderField(j);
if (header == null)
break;
System.out.println(uc.getHeaderFieldKey(j) + ": " + header);
}
}
}
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