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Asked: 2026-05-27T05:03:12+00:00

I got stuck with a performance problem while writing my program and I need

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I got stuck with a performance problem while writing my program and I need your help! 🙂

I’m using a JTable to view test results taken from a vector I made and it has 4 columns in it. When I click on a row the details from a saved txt file of that test are shown in a child window. Also, when I click on the columns header the event sends the vector to a function that sorts it according to the pressed column. Every time a new value needs to be entered the sorting function is called again.

My program works fine with a small number of rows. But, when I enter say, 150 rows, every time I enter a new row the Table flicks (the sort probably takes a lot of time), but I have to keep the vector synchronized with the jable because of the “push to view the result” option.

I would really appreciate some help with this.
thanks

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1 Answer

  1. Editorial Team

    Use JTable’s internal sorter (DefaultRowSorter). Do not re-create the vector which holds the data – use Vector’s add() method to add new records. In many years of Java GUI development I haven’t seen a single case where I had to keep records in the TableModel sorted. Make sure getColumnClass() returns a proper type, so the default sorter knows how to sort the column, and that is all.

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