Set Column Width of JTable by Percentage

Question

I need to assign a fixed width to a few columns of a JTable and then an equal width to all the other columns.

Suppose a JTable has 5 column

Answer 1

public MyJFrame() {
    initComponents();
    resizeColumns();
    addComponentListener(new ComponentAdapter() {
        @Override
        public void componentResized(ComponentEvent e) {
            resizeColumns();
        }
    });
}
//SUMS 1
float[] columnWidthPercentage = {0.2f, 0.55f, 0.1f, 0.05f, 0.05f, 0.05f};

private void resizeColumns() {
    // Use TableColumnModel.getTotalColumnWidth() if your table is included in a JScrollPane
    int tW = jTable1.getWidth();
    TableColumn column;
    TableColumnModel jTableColumnModel = jTable1.getColumnModel();
    int cantCols = jTableColumnModel.getColumnCount();
    for (int i = 0; i < cantCols; i++) {
        column = jTableColumnModel.getColumn(i);
        int pWidth = Math.round(columnWidthPercentage[i] * tW);
        column.setPreferredWidth(pWidth);
    }
}