A Strange Number

Posted by andy in : Agile on November 13, 2006.

I came across a very strange number today while writing some unit tests.  Apparently Java thinks “10WTF?” is a perfectly valid number and does not throw a ParseException when you try converting the string to a number.

Here is the unit test to prove it!

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import junit.framework.TestCase;
 
import java.text.DecimalFormat;
import java.text.ParseException;
 
public class StrangeNumberTest extends TestCase {
 
    public void testWierdJavaNumber() throws ParseException {
        DecimalFormat format = new DecimalFormat("##,###.00");
 
        assertEquals("Amazing, but true",
                     10,
                     (Long) format.parse("10WTF?"), 0);
    }
}

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