KwickClips Java · 39 sec · free
Why can my code not find the control after I changed its text?
Short answer. Text and variable name are two different things. Change Variable Name changes the code name.
What prefix is used for a text field?
txt, for example txtP.
Three controls
| Control | Prefix |
|---|---|
| JLabel | lbl |
| JTextField | txt |
| JButton | btn |
Remember
| Text is what users see |
| Variable name is for code |
Changed the text but code cannot find it? Why? Prefix names the control type. Drag controls from the Palette. Edit Text changes what users see. Variable Name changes the code name. Text is what users see. Variable name is used in code.
This clip is from the full lesson: GUI Applications in NetBeans: JFrame, JPanel, JTable and JOptionPane — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Information Technology (802), CBSE Class 11 Information Technology (802)
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Why does nothing happen when I click the button?41 secDisclaimer. KwickAcademy is free study material for general learning and revision. Parts of it, including the voice-over, are produced with the help of AI tools and may contain errors; if you spot one, please tell us and we will correct it. Syllabus, marks and exam details follow the latest official board publications available to us, and boards can change them at any time, so always confirm against your board's official website and your school. Using this material does not guarantee any marks or result. Board names and trademarks belong to their owners; Kwickprep is not affiliated with or endorsed by any examination board. We never ask for passwords, OTPs or ID numbers. Your progress is saved only in this browser. Full disclaimer · Privacy