Java

private boolean validateInput(String input1, String input2)
    {

        Boolean[] inputValidArray = {false , false};
        String[] inputArray = {input1, input2};

        JTextField[] textFieldArray = {jTextField1, jTextField2};

        float numberToValidate = 0;
        int counter = 0;   
        String errorMessage = "";

        while (!inputValidArray[0] || !inputValidArray[1])
        {
            try
            {
                // Check for empty or null input
                if (!(inputArray[counter].isEmpty() || inputArray[counter] == null))
                {
                    numberToValidate = Float.valueOf(inputArray[counter]);
                    inputValidArray[counter] = true;                
                }
                else
                {
                    errorMessage = "This field can not be left blank!\n" +
                                   "  Please enter a valid number!\n" +
                                   "  (example: 123.45 or -123.45)";

                    Create_Error_Message_Dialog_Box(errorMessage); 

                    textFieldArray[counter].requestFocusInWindow();
              
                }

            }
            catch (NumberFormatException nfe)
            {
                errorMessage = inputArray[counter] + " is not a valid number!\n" +
                               "Please enter a valid number!\n" +
                               "(example: 123.45 or -123.45)";

                Create_Error_Message_Dialog_Box(errorMessage);

                textFieldArray[counter].requestFocusInWindow();
                textFieldArray[counter].selectAll();

            }

            counter += 1;

        }
        
        return (inputValidArray[0] && inputValidArray[1]);
    }