There's a lot wrong here. One,your class extends JFrame but also constructs a JFrame f, which is never used. Then, there's a setVisible(true) before any components are added. And since JFrame has a default BorderLayout, and you add 10 components without any constraints, only the last of these will be managed by the layout manager.
I suggest you go through the Swing tutorial trail, doing all the exercises as you go along. There's really no substitute for learning how to do things correctly.
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Joined: Jan 27, 2011
thank you very much sir
i make a database and also define a interface to retrieve data from database...i created four button out these four button only one button is working and reaming are not.....when i click on these button and receive a message on cmd which is like that...
java.sql.SQlException Result set type is TYPE_FOREWORD_ONLY