Format, 2 decimal places for double and 0 for integer in java

Question

I am trying to format a double to exact 2 decimal places if it has fraction, and cut it off otherwise using DecimalFormat

So, I'd like to achieve next results:

100.123 -> 100.12
100.12  -> 100.12
100.1   -> 100.10
100     -> 100

Variant #1

DecimalFormat("#,##0.00")

100.1 -> 100.10
but
100   -> 100.00

Variant #2

DecimalFormat("#,##0.##")

100   -> 100
but
100.1 -> 100.1

Have any ideas what pattern to choose in my case?

Answer 1

The only solution i reached is to use if statement like was mentioned here: https://stackoverflow.com/a/39268176/6619441

public static boolean isInteger(BigDecimal bigDecimal) {
    int intVal = bigDecimal.intValue();
    return bigDecimal.compareTo(new BigDecimal(intVal)) == 0;
}

public static String myFormat(BigDecimal bigDecimal) {
    String formatPattern = isInteger(bigDecimal) ? "#,##0" : "#,##0.00";
    return new DecimalFormat(formatPattern).format(bigDecimal);
}

Testing

myFormat(new BigDecimal("100"));   // 100
myFormat(new BigDecimal("100.1")); // 100.10

If someone knows more elegant way, please share it!