How to Insert a Decimal Point in a String Representation of an Integer?

How can I convert a 6-digit integer to a string with a decimal point inserted two digits from the end?

int j = 123456;

Converting a 6-digit integer into a formatted string with a decimal point involves manipulating the string representation of the integer. This allows you to display monetary values or similar formatted numbers correctly.

public static String formatInteger(int number) {
    String numberStr = Integer.toString(number); // Converts integer to string
    if (numberStr.length() < 3) {
        return "0." + String.format("%02d", number); // Formatting for values < 3 digits
    }
    // Insert decimal point before the last two digits
    return numberStr.substring(0, numberStr.length() - 2) + "." + numberStr.substring(numberStr.length() - 2);
}

Causes

• The integer format does not visually represent decimal places; converting to string with formatted output provides clarity.
• Using float can lead to precision issues when formatting for display, especially for currency.

Solutions

• Convert the integer to a string.
• Insert the decimal point two characters from the end of the string representation.
• Return the newly formatted string.

Mistake: Not handling integers with less than 6 digits.

Solution: Include a check to add leading zeros if necessary or adjust handling logic accordingly.

Mistake: Assuming all integers will have exactly six digits.

Solution: Ensure input is validated to confirm it's a six-digit integer before conversion.