How to add spaces between numbers with Kotlin-CodePudding

How can I format string "2000000.00" into "2 000 000.00" with Kotlin?

CodePudding user response：

You can do this with DecimalFormat():

val dec = DecimalFormat(<pattern> [, <optional, but recommended locale>])

and then replace , with :

    val number = 2000000.00
    val dec = DecimalFormat("###,###,###,###,###.00", DecimalFormatSymbols(Locale.ENGLISH))

    val formattedNumber = dec.format(number).replace(",", " ")
    println(formattedNumber)

.00 is needed to keep the digits!!!

This will print:

2 000 000.00

here as a test:

@Test
fun testDecimalFormat() {
    val number = 2000000.00
    val dec = DecimalFormat("###,###,###,###,###.00", DecimalFormatSymbols(Locale.ENGLISH))

    val formattedNumber = dec.format(number).replace(",", " ")
    assertThat(formattedNumber).isEqualTo("2 000 000.00")
}

@Test
fun testDecimalFormatWithDigitValue() {
    val number = 2000000.01
    val dec = DecimalFormat("###,###,###,###,###.00", DecimalFormatSymbols(Locale.ENGLISH))

    val formattedNumber = dec.format(number).replace(",", " ")
    assertThat(formattedNumber).isEqualTo("2 000 000.01")
}

Link: https://docs.oracle.com/javase/tutorial/i18n/format/decimalFormat.html