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thank you
my Problem is solution

my java and netbeans version
Product Version: NetBeans IDE 7.0.1 (Build 201107282000)
Java: 1.6.0_07
i copy and past the error in netbeans

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i posted error the error is
non-static variable this cannot be referenced from a static contex
in line SimpleFrame frame = new SimpleFrame();
The code is my post have space in my computer do not...

this program in notepad is correct i run it in cmd
but this is not correct in netbeans
the error is non-static variable this cannot be referenced from a static contex
i change the SimpleFrame...