To replace all the occurrences of a specific character with another character in a string in Kotlin, you can useString.replace()function. Call thereplace()function on the string, and pass the old character, and new replacement character as arguments. The function returns a new string with the...
You can use the Unicode escape sequence syntax to input any character by referencing its code point. For example, \u0037 is equivalent to 7. You can concatenate strings using the + operator, as in many other languages. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 var text:String = ...
默认值为false,即用Java的replace()函数 // 把字符`a`全部替换为`A` val str = "Kotlin is a very good programming language" println(str.replace('a','A')) 1. 2. 3. 输出结果为: Kotlin is A very good progrAmming lAnguAge 1. replace(oldValue,newValue,ignoreCase = false) 其中: 作用: 把...
println(str.first())//输出:1println(str.first {it =='5'})//输出:5println(str.first {it =='a'})//输出:Exceptioninthread"main"java.util.NoSuchElementException: Char sequence contains no character matching the predicate. at com.example.demoapp.DemoCheckKt.main(DemoCheck.kt:19) at com....
A string is a basic data type in a programming language. In Kotlin, theStringclass represents character strings. Kotlin string literals are implemented as instances of this class. Kotlin uses double quotes to create string literals. Kotlin has a rich API for working with strings. It contains pl...
var name = "Igor" // Inferred type is String name = "Marcin" 请注意,Kotlin 不需要分号。你仍然可以使用它们,但它们是可选的。我们也不需要指定变量类型,因为它是从上下文中推断出来的。每当编译器可以从上下文中推断出类型时,我们就不必明确指定它。Kotlin 是一种强类型语言,因此每个变量都有适当的类型: ...
如需根据本风格指南配置 IntelliJ 格式化程序,请安装 Kotlin 插件1.2.20 或更高版本,转到“Settings | Editor | Code Style | Kotlin”,点击右上角的“Set from...”链接,并从菜单中选择“Predefined style / Kotlin style g...
If replacement is an empty string, this function will create a new string by removing the specified range from the original string − funmain(){valstring="Hello tutorialspoint"// specify the rangevalnew_string=string.replaceRange(6..13,"")println("This is the new string: "+new_string)}...
public final class StringUtils {public static final Character lastElement(String $this) {// 省略}}public static final void main() {Character last = StringUtils.lastElement(msg);} 所以Kotlin 扩展函数本质上和 Java静态方法 是一样的。 只是编译器帮我们做了很多事情, 让代码写起来更简洁。
We will use two library functionsmaxBy()andstartsWith()to accomplish this task. ThestarsWith()function returnstrueif it starts with the specified character passed as an argument. data class Person(val name: String, val age: Int) fun main(args: Array<String>) { ...