Java String class replaceAll method missing

Question

I'm having a very weird issue right now, the replaceAll method is missing from the String object.

JDK version: 1.8.0
Android Studio version: 3.1.3
Kotlin version: 1.2

It hasn't been removed, so whats going on here??

@HalayemAnis it's Kotlin. Kotlin is a JVM language, which means it uses Java API's (the reason it's tagged Java) — Zoe - Save the data dump
– Zoe - Save the data dump, Commented Jun 20, 2018 at 10:29
@daka That's a kotlin String, not a java String. Kotlin has just replace — Federico klez Culloca
– Federico klez Culloca, Commented Jun 20, 2018 at 10:30
The Kotlin replace function can accept a Regex argument. It doesn't need replaceAll. — khelwood
– khelwood, Commented Jun 20, 2018 at 10:31

zsmb13 · Accepted Answer · 2018-06-21 04:03:10Z

83

You can do this with just replace in Kotlin:

"foo and foo".replace("foo", "bar") // "bar and bar"

Note that the call above replaces the literal strings, if you need a Regex as the first parameter you can do either of the following:

"foo and bar".replace("[abcd]".toRegex(), "x") // "foo xnx xxr"
"foo and bar".replace(Regex("[abcd]"), "x")    // "foo xnx xxr"

edited Jun 21, 2018 at 4:03

answered Jun 20, 2018 at 10:30

zsmb13

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1 Comment

xjcl Over a year ago

What do I do if I replace with $1 like here? stackoverflow.com/a/40487511/2111778

Zoe - Save the data dump · Accepted Answer · 2018-06-20 10:33:09Z

20

Kotlin has it's own String class. All the replace methods are just replace.

replaceAll in Java uses regex, so I assume your goal is using regex. To do this, just use a regex object when you pass to replace:

sb.toString().replace("your regex".toRegex(), "replacement");

If you don't have regex (and that's wrong), don't call .toRegex():

sb.toString().replace("replace target", "replacement");

answered Jun 20, 2018 at 10:33

Zoe - Save the data dump

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Comments

Zinc · Accepted Answer · 2018-06-20 10:31:31Z

6

Kotlin has replaceAll as replace:

replace in Kotlin

actual fun String.replace(
oldChar: Char, 
newChar: Char, 
ignoreCase: Boolean = false
): String (source)

Returns a new string with all occurrences of oldChar replaced with newChar.

answered Jun 20, 2018 at 10:31

Zinc

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