java - Disable JFrame when a new JFrame is opened -

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i trying disable "main" jframe when new frame pops up. want can not click or drag on frame. tried making new frame jdialog, did not disable other frame. looked @ other post this, suggested make jdialog still not work. need doing please. thanks. codeii using make jdialog, problems it? 

editdialog=new jdialog(introscreen.frame);

introscreen.frame represents "main" frame.

you have set jdialog#setmodal or jdialog#modalitytypes, maybe dialog.modalitytype application_modal


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