Qi Liang

The staic class is generally used as static nested class like "In" in you code. The methods in static nested class can not access the member of outer class.

class Ex { int i; public void amethod() { System.out.println("Amethod"); } static class In { public void method() { i = 100; // Compile error System.out.println("method in inner class"); } } public static void main(String args[]) { Ex e = new Ex(); e.amethod(); In i = new In(); In i1 = new In(); i.method(); i1.method(); } }

Also, I do not think static class just has only one instance. It can have more than one instance.

I think whether abstract method is defined is not the key that one interface becomes interface. Any way, in practice, the marker interface is used widely.

Why don't you try to debug it to see where the NPE is thrown?

One reason is the primitive types, like int, double and so on.

You can use java.text.format.DateFormmater to parse "12:30" with your pattern to a java.util.Date object. Then use methods in java.util.Date to do any you want.

A good example is java.io.Serializable.

The marker interface works like a boolean flag to indicate the class implementing this interface has some capability, but there is not method involved.

int a = 10; static b = 20;

are members of the class Test, right?

If so, 't' and 't1' in both CODE1 and CODE2 share one static b.

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Where to go after seven years' development?

The error is raised by class loader. It must have loaded java.lang.String from JRE.

PHPBB is open source forum based on PHP, and has a lot of resource.

Cliff Liang

It works.

Thanks!

Cliff Liang

Hi,

I have some CSS files used in current product. Now I am required to generate HTML with XLST from XML data. But I am not sure whether I can use the CSS style in XSLT?

Thanks!

Cliff Liang

I'd like to expose some public methods in one public class and hide some public methods, which seems the DLL export in C++. But I can not find how to support this. Do you hava idea on it?

Thanks!

I installed J2SDK 1.4 in the windows with the locale "Chinese", and got the default locale, which is "Chinese". When I changed the OS locale to "Greece" and rebooted, "Greece" is returned with Locale.getLocale() in windows 2000. But "Chinese" is returned with Locale.getLocale() in windows XP.

I deduced that JVM must have got the wrong default locale from windows. Do you touch the part that JVM get system locale?

Thanks

Cliff Liang

I didn't find SystemDate in J2SE API.

Yes. But you should be careful for JBoss take EJB 1.2 as default.