在开始编辑时更改JTable单元格边框的颜色（不是单击时，仅在光标出现时）

Question

I am trying to change the border of a JTable cell on starting of editing, as in: when the text cursor appears. How would you do it?

Answer 1

For that purposes you can write your own TableCellEditor or use DefaultTableCellEditor .

With second way you can do it with this code ( table is your table):

for(int i =0;i<table.getColumnCount();i++){
    table.getColumnModel().getColumn(i).setCellEditor(getCellEditor());
}

and code of getCellEditor() method:

private TableCellEditor getCellEditor() {
    JTextField f = new JTextField();
    f.setBorder(BorderFactory.createLineBorder(Color.RED));
    return new DefaultCellEditor(f);
}

Here I use DefaultCellEditor with JTextField which has red border.

I think it helps you.