Java swing how to edit double cell in JTable

Question

I have a Jtable with one of the columns presenting price which should be editable. But whenever I try to update the cell value I get the exception:

java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.String

the model for my product is as follows:

public class Product{
private double price;
private String name;
private Icon pic;

public Product(String name, double price){
    this.name= name;
    this.price = price;
}

public void setPrice(double price){
    this.price = price;
}

//other getters and setters

}

In my custom class extending AbstractTableModel:

private ArrayList<Product> products;

//constructor and other methods
public void setValueAt(Object val, int row, int col) {
    if (col == 2){
        try{
            double price = Double.parseDouble((String)val);
             products.get(row).setPrice(price);          
        }
        catch(Exception e){
        }
        fireTableCellUpdated(row, col);
    }
  }

  public Class<?> getColumnClass(int c) {

    return getValueAt(0, c).getClass();
  }

  @Override
public Object getValueAt(int rowNo, int column) {
    Product item = products.get(rowNo);

    switch(column){
        case 0: return item.getPic(); 
        case 1: return item.getName();
        case 2: return item.getPrice();
        default: return null;
    }       
}

Should I change the price to string? Is there any other normal way to do this? If I remove getColumnClass override price change works, but then I cannot display product Pic so this is not a solution.

Answer 1

problem with this line (what i analysed by your Code added in Question). You just try to parse a double Object into a String which is not possible in java because there is no child-parent relationship between String and Double.

double price = Double.parseDouble((String)val); //trying to cast double as String.

This line of code will raise ClassCastException. because of val is a double type of Object not a String.

you may try this should works fine.

double price = (double)val; //try this

Thank You.