Kotlin Multiline string to single line

1. Overview

In this article, we will learn to convert Multiline string to a single line in Kotlin.

You can look into our Kotlin articles to know more about other topics.

Kotlin has two types of the string literal:

• escaped strings that may contain escaped characters (For example: val s = "Hello, world!\n"). You can escape the characters in a conventional way, with a backslash (\).
• raw or multiline strings that can contain newlines and arbitrary text and do not support backslash escaping.

2. Kotlin multiline string

A raw string is delimited by a triple quote ("""), contains no escaping and can contain newlines and any other characters.

For example, the following main method contains a raw string.

fun main() {
   val text = """
    |Tell me and I forget.
    |Teach me and I remember.
    |Involve me and I learn.
    |(Benjamin Franklin)
    """
    println(text)
    println("Done")
}

If you notice, the above code introduces additional leading whitespace characters.

    |Tell me and I forget.
    |Teach me and I remember.
    |Involve me and I learn.
    |(Benjamin Franklin)
Done

3. Convert Multiline string to a single line string

You can convert the multiline string to a single line string by using replace.

fun main() {
   val text = """
    >Tell me and I forget.
    >Teach me and I remember.
    >Involve me and I learn.
    >(Benjamin Franklin)
    """.trimMargin(">")
    println(text)
    println(text.replace("\n",""))
}

4. Conclusion

To sum up, we have learned to convert the multiline string to a single line string in Kotlin.