Java Load text file to JTable

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0

I have this program and i want to load a txt file to my JTable and edit it with my program and save it again or at least save my table to a txt file. I have tried doing with Arraylist, Vectors and Mapping so at least i can save it but nothing wont work. Need Help!

This is the code for my JTable

private void editActionPerformed(java.awt.event.ActionEvent evt) {                                     
     msg.setText(""); 
    DefaultTableModel model = (DefaultTableModel) Tstudents.getModel();
     if (Tstudents.getSelectedRow() == -1){
         if (Tstudents.getRowCount()==0){
             msg.setText("The Table is empty!!");
         } else {
                   msg.setText("You must select a Student!!");
                     }
         }
         else {
     model.setValueAt(ID.getText(),Tstudents.getSelectedRow(),0);
     model.setValueAt(name.getText(),Tstudents.getSelectedRow(),1);
     model.setValueAt(sname.getText(),Tstudents.getSelectedRow(),2);
     model.setValueAt(math.getText(),Tstudents.getSelectedRow(),3);
     model.setValueAt(grade.getText(),Tstudents.getSelectedRow(),4);
} 

And this is all my code:

 public Table() {
    initComponents();                              
private void addActionPerformed(java.awt.event.ActionEvent evt) {                                    

    msg.setText("");
    DefaultTableModel model = (DefaultTableModel) Tstudents.getModel();
    if (!ID.getText().trim().equals("")){
        model.addRow(new Object[]{ID.getText(),name.getText(),sname.getText(),math.getText(),grade.getText()});
    }
    else {
        msg.setText("ID cant be null!!");

                }

}                                   

private void editActionPerformed(java.awt.event.ActionEvent evt) {                                     
     msg.setText(""); 
    DefaultTableModel model = (DefaultTableModel) Tstudents.getModel();
     if (Tstudents.getSelectedRow() == -1){
         if (Tstudents.getRowCount()==0){
             msg.setText("The Table is empty!!");
         } else {
                   msg.setText("You must select a Student!!");
                     }
         }
         else {
     model.setValueAt(ID.getText(),Tstudents.getSelectedRow(),0);
     model.setValueAt(name.getText(),Tstudents.getSelectedRow(),1);
     model.setValueAt(sname.getText(),Tstudents.getSelectedRow(),2);
     model.setValueAt(math.getText(),Tstudents.getSelectedRow(),3);
     model.setValueAt(grade.getText(),Tstudents.getSelectedRow(),4);
}                                    
}
private void TstudentsMouseClicked(java.awt.event.MouseEvent evt) {                                       
   DefaultTableModel model = (DefaultTableModel) Tstudents.getModel();
    ID.setText(model.getValueAt(Tstudents.getSelectedRow(),0).toString());
    name.setText(model.getValueAt(Tstudents.getSelectedRow(),1).toString());
    sname.setText(model.getValueAt(Tstudents.getSelectedRow(),2).toString());
    math.setText(model.getValueAt(Tstudents.getSelectedRow(),3).toString());
    grade.setText(model.getValueAt(Tstudents.getSelectedRow(),4).toString());
}                                      

private void deleteActionPerformed(java.awt.event.ActionEvent evt) {                                       
    DefaultTableModel model = (DefaultTableModel) Tstudents.getModel();
    if (Tstudents.getSelectedRow() == -1){
         if (Tstudents.getRowCount()==0){
             msg.setText("The Table is empty!!");
         } else {
                   msg.setText("You must select a Student!!");
                     }
         }
         else {
        model.removeRow(Tstudents.getSelectedRow());
}                                      
}
private void clearActionPerformed(java.awt.event.ActionEvent evt) {                                      
    ID.setText("");
    name.setText("");
    sname.setText("");
    math.setText("");
    grade.setText("");

}                                     

private void saveActionPerformed(java.awt.event.ActionEvent evt) {                                     
   MessageFormat header = new MessageFormat("Students");
    MessageFormat footer = new MessageFormat("Page{0,number,integer}");
    try{
    Tstudents.print(JTable.PrintMode.NORMAL, footer, footer);
    }
    catch (java.awt.print.PrinterException e){
        System.err.format("File not found", e.getMessage());
    }
}   

public static void main(String[] args){
java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Table().setVisible(true);
        }
 });
               }

asked 10 secs ago

Anna Del

5

Java Load text file to JTable