java - 调用方法？

Question

好的。我写了上面的代码，我需要从另一个类调用它。我该怎么做？另外，它给了我这个错误 DefaultTableModel prodt = (DefaultTableModel) protable.getModel(); 。错误是无法从静态上下文引用非静态变量 protable。

public static void refreshProtable() {
    try {
        Statement s1 = Db.connectDb().createStatement();
        ResultSet rs1 = s1.executeQuery("SELECT * FROM product WHERE status='" + 0 + "'");

        DefaultTableModel prodt = (DefaultTableModel) protable.getModel();
        while (rs1.next()) {
            Vector v1 = new Vector();
            v1.add(rs1.getString("pid"));
            v1.add(rs1.getString("pname"));
            v1.add(rs1.getString("sp_rt"));
            v1.add(rs1.getString("sp_wh"));
            v1.add(rs1.getString("um"));
            Statement s2 = Db.connectDb().createStatement();
            ResultSet rs2 = s2.executeQuery("SELECT * FROM stock WHERE pid='" + rs1.getString("pid") + "'");
            if (rs2.next()) {
                v1.add(rs2.getString("qty"));
            }
            prodt.addRow(v1);
            s2.close();
        }
        s1.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 1

将变量标记为静态或使方法成为非静态。

私有(private)静态DefaultTableModel protable;

public static void refreshProtable() { ... }