equals

Платформа и требования к версии: Common (1.0), JS (1.1), JVM (1.0), Wasm-JS (1.8)

expect open operator override fun equals(other: Any?): Boolean

Показывает, равен ли другой объект этой строке String.

Объект другой равен этой строке String тогда и только тогда, когда он также является строкой String, имеет такую же длину, как эта строка String, и символы в одинаковых позициях в обеих строках равны друг другу.

Примеры

import kotlin.test.*

fun main() { 
   //sampleStart 
   println("\"\" == \"\" is ${"" == ""}") // true
println("\"abc\" == \"abc\" is ${"abc" == "abc"}") // true

println("\"abc\" == \"abcd\" is ${"abc" == "abcd"}") // false
println("\"abc\" == \"Abc\" is ${"abc" == "Abc"}") // false
// If a character's case doesn't matter, strings could be compared in a case-insensitive manner
println("\"abc\".equals(\"Abc\", ignoreCase = true) is ${"abc".equals("Abc", ignoreCase = true)}") // true

val builder = StringBuilder("abc")
println(builder) // abc
// Although the builder holds the same character sequence, it is not a String
println("\"abc\".equals(builder) is ${"abc".equals(builder)}") // false 
   //sampleEnd
}

Платформа и требования к версии: Native (1.3)

actual open operator external override fun equals(other: Any?): Boolean

Показывает, равен ли другой объект этой строке String.

Примеры

import kotlin.test.*

fun main() { 
   //sampleStart 
   println("\"\" == \"\" is ${"" == ""}") // true
println("\"abc\" == \"abc\" is ${"abc" == "abc"}") // true

println("\"abc\" == \"abcd\" is ${"abc" == "abcd"}") // false
println("\"abc\" == \"Abc\" is ${"abc" == "Abc"}") // false
// If a character's case doesn't matter, strings could be compared in a case-insensitive manner
println("\"abc\".equals(\"Abc\", ignoreCase = true) is ${"abc".equals("Abc", ignoreCase = true)}") // true

val builder = StringBuilder("abc")
println(builder) // abc
// Although the builder holds the same character sequence, it is not a String
println("\"abc\".equals(builder) is ${"abc".equals(builder)}") // false 
   //sampleEnd
}

Платформа и требования к версии: Wasm-WASI (1.8)

actual open operator override fun equals(other: Any?): Boolean

Показывает, равен ли другой объект этой строке String.

Примеры

import kotlin.test.*

fun main() { 
   //sampleStart 
   println("\"\" == \"\" is ${"" == ""}") // true
println("\"abc\" == \"abc\" is ${"abc" == "abc"}") // true

println("\"abc\" == \"abcd\" is ${"abc" == "abcd"}") // false
println("\"abc\" == \"Abc\" is ${"abc" == "Abc"}") // false
// If a character's case doesn't matter, strings could be compared in a case-insensitive manner
println("\"abc\".equals(\"Abc\", ignoreCase = true) is ${"abc".equals("Abc", ignoreCase = true)}") // true

val builder = StringBuilder("abc")
println(builder) // abc
// Although the builder holds the same character sequence, it is not a String
println("\"abc\".equals(builder) is ${"abc".equals(builder)}") // false 
   //sampleEnd
}

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/equals.html