Urgent!!! cut function in JTextArea is not working

In my project, I am using a JTextArea. To remove a particular text in text area, i was selecting the text and I was using cut() function to cut the selected text. This functionality was working fine when I was running the the project on JBuilder. But when I run the same without using JBuilder( on jdk). It doesn't work i.e the text doen't get cut. But there are no errors.
Is cut() function a JBuilder library function?If it is so, How do I accomplish the same task without using
cut() ? Please help me...

and what if you use the javax.swing.text.DefaultEditorKit copy-cut-paste default actions for text components ?
copyButton = new JButton(new DefaultEditorKit.CopyAction());
Such an action can be set to a Button, Popup,...
Regards,
Stephane

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