在java中求和Jtable coumn值

import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class SumJTableColumn {
    public static double sumColumnValues(JTable table, int columnIndex) {
        DefaultTableModel model = (DefaultTableModel) table.getModel();
        int rowCount = model.getRowCount();
        double sum = 0.0;

        for (int row = 0; row < rowCount; row++) {
            Object value = model.getValueAt(row, columnIndex);
            if (value instanceof Number) {
                sum += ((Number) value).doubleValue();
            }
        }

        return sum;
    }

    public static void main(String[] args) {
        // 示例用法
        JTable table = new JTable();
        // 假设表格有3列，求第2列的和
        int columnIndex = 1;
        double sum = sumColumnValues(table, columnIndex);
        System.out.println("Sum of column " + columnIndex + ": " + sum);
    }
}