Question

I’m sorry it’s my first time posting here and I am really, really bad at java.

I have a JTable in one of my panels and what I need to do is save the contents to a file. When a certain string is entered into a JTextfield, the file loads and populates the JTable.

I have no clue where to start and I’ve searched youtube for help and I was sore out of luck. Help me please?

Answer 1

 public Object[][] getTableData (JTable table) {
       (DefaultTableModel) dtm = (DefaultTableModel) table.getModel();
           int nRow = dtm.getRowCount(), nCol = dtm.getColumnCount();
           Object[][] tableData = new Object[nRow][nCol];
           for (int i = 0 ; i < nRow ; i++)
               for (int j = 0 ; j < nCol ; j++)
                   tableData[i][j] = dtm.getValueAt(i,j);
           return tableData;
       }

You can store the values in the Jtable as an array,

After that write this to the file …

    public void writeToFile()
      {
      try{
      FileWriter fstream = new FileWriter("out.txt");
      BufferedWriter out = new BufferedWriter(fstream);
      for(int i=0;i<array.length;i++){
            out.write(array[i].getBytes());
      }
      out.close();
      }catch (Exception e){
      System.err.println("Error: " + e.getMessage());
      }