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I'd like to expose you the following fact : As I am designing a JFrame containing a JLabel matrix, I've got to use lots of copy/paste to speed my job. But when I copy numerous - say 40 - labels at a time, as I do a "paste", NetBeans adds one by one all of these labels to the container I've chosen. If it was done quickly, I should not have to complain. But NetBeans runs so slowly (on my Pentium 3 with 256 Mo PC !) that I can't bear such a one-by-one way of pasting !!! Maybe this issue has also to do with the performance issue, but one way to enhance this would be to do a one-shot paste !!
Þ *** This issue has been marked as a duplicate of 21419 ***
Resolved for 3.3.x or earlier, no new info since then -> closing.