String str = (String) table.getModel().getValueAt(i, 3);
String str1 = (String) table.getModel().getValueAt(i, 5);
System.out.println("object is " + Float.valueOf(str));
System.out.println("object is1 " + Float.valueOf(str1));
Float a,c;
a=Float.valueOf(str);
c=Float.valueOf(str1);olve error