Java – How do I get value from a column? ( java )

I

do simple alerts, I need to display alerts if the value == in column 0 today.

    Calendar cal = new GregorianCalendar();
    int day = cal.get(Calendar.DAY_OF_MONTH);        

try {

File currDir= new File ("Baza.db");
        String sc = currDir.getAbsolutePath();
         sc = sc.substring(0, sc.length());

String url = "jdbc:sqlite://"+sc;
         Connection conn = DriverManager.getConnection(url);
         Statement stmt  = conn.createStatement();
         ResultSet rs = stmt.executeQuery("SELECT Day FROM Month");

jTable1.setModel(DbUtils.resultSetToTableModel(rs));
         if(jTable1.getValueAt(0, 0).equals(day)){
          JOptionPane.showMessageDialog(null, "Do your question!");
      }
    } catch (SQLException e) {
        JOptionPane.showMessageDialog(null, e);
    }

I tried using the methods getColumn, getColumnModel, and getSelectedColumn, but didn’t compare it with my calculation.

Your day variable is of type int and jTable1.getValueAt(0, 0) returns an Object, so both are different types and always return false when comparing.

Because you want to compare them as strings for equality, you should change your comparison

if(jTable1.getValueAt(0, 0).equals(day)){

to,

if(String.valueOf(jTable1.getValueAt(0, 0)).equals(String.valueOf(day))){

Alternatively, you can parse the values in the JTABLE column to int and then compare the integer values like this

if(Integer.parseInt(jTable1.getValueAt(0, 0).toString()) == day){

However, I prefer the first way to compare strings, because the second way may encounter NumberFormatException