Mega Code Archive
Collections
<![CDATA[
/*
22.5
5
354.5676
*/
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import javax.swing.JPanel;
/**
* Demonstrates the use of instance comparisons.
*
* @author <a href=mailto:kraythe@arcor.de>Robert Simmons jr. (kraythe)</a>
* @version $Revision: 1.3 $
*/
public class InstanceOfDemo {
/** A set of demon objects. */
public static final Set OBJECT_SET;
static {
Set objectSet = new HashSet();
objectSet.add(new Integer(5));
objectSet.add(new String("Hardcore Java"));
objectSet.add(new Float(22.5f));
objectSet.add(new JPanel());
objectSet.add(new Character('x'));
objectSet.add(new ArrayList());
objectSet.add(new Double(354.5676));
objectSet.add(null);
OBJECT_SET = Collections.unmodifiableSet(objectSet);
}
/**
* Demo method.
*
* @param args Command Line arguments.
*/
public static void main(final String[] args) {
final Iterator iter = OBJECT_SET.iterator();
Object obj = null;
while (iter.hasNext()) {
obj = iter.next();
if (obj instanceof Number) {
System.out.println(obj);
}
}
}
}
/* ########## End of File ########## */
]]>