scala 转换为字符串_如何在Scala中将枚举转换为字符串？

柔情只为你懂 2023-03-05 12:49 29阅读 0赞

scala 转换为字符串

Before learning about the conversion let's discuss for basics about enum and strings.

在学习转换之前，让我们讨论有关枚举和字符串的基础知识。

**enum** is also known as ***Enumeration*** is a set of named constants that are used in modeling in programming languages.

**枚举**也称为***枚举。枚举***是在编程语言的建模中使用的一组命名常量。

**Example:**

**例：**

object programming_language extends Enumerations {
        val c, c++, scala, java, javascript, python = Value
    }

[String in Scala][] is a collection of characters. It is a mutable object i.e. once created the string values cannot be changed.

[Scala][String in Scala]中的[String][String in Scala]是字符的集合。 这是一个可变对象，即一旦创建，字符串值就无法更改。

**Example:**

**例：**

val string : String = "includehelp.com"

## 将枚举转换为字符串 **(**Convert enum to string**)** ##

We can **convert an enum object to string in Scala**. For this, we have to provide a string value to all the named constants which will be then printed. The conversion will be done using the *toString()* method present in the Scala library.

我们可以**在Scala中将枚举对象转换为字符串** 。 为此，我们必须为所有命名常量提供一个字符串值，然后将其打印出来。 转换将使用Scala库中存在的*toString()*方法完成。

**Syntax:**

**句法：**

enum_object.value.toString

## Scala程序将枚举转换为字符串 **(**Scala program to convert enum to string**)** ##

// Program to convert enum to string in Scala
    object MyClass {
        
        // Creating a Enum
        object programmingLang extends Enumeration {
        
            val C = Value("C programming language")
            val java = Value("Java programming language")
            val scala = Value("Scala programming language")
            val javascript = Value("JavaScript programming language.")
        }
        def main(args: Array[String]) {
        
            // Converting to String
            println("The string conversion of each value of Enum is :")
            println(programmingLang.C.toString)
            println(programmingLang.java.toString)
            println(programmingLang.scala.toString)
            println(programmingLang.javascript.toString)
        }
    }

**Output:**

**输出：**

The string conversion of each value of Enum is :
    C programming language
    Java programming language
    Scala programming language
    JavaScript programming language.

**Description:**

**描述：**

In the above code we have created an enumeration named *programmingLang* with 4 values and then using the *tostring* method we have converted enum value to string which is printed to output using *println()* method.

在上面的代码中，我们创建了一个带有4个值的名为*programmingLang*的枚举，然后使用*tostring*方法将枚举值转换为字符串，并使用*println()*方法将其打印输出。

> 翻译自: [https://www.includehelp.com/scala/convert-enum-to-string-in-scala.aspx][https_www.includehelp.com_scala_convert-enum-to-string-in-scala.aspx]

scala 转换为字符串

[String in Scala]: https://www.includehelp.com/scala/strings-in-scala.aspx
[https_www.includehelp.com_scala_convert-enum-to-string-in-scala.aspx]: https://www.includehelp.com/scala/convert-enum-to-string-in-scala.aspx