scala 转换为字符串_如何在Scala中将字符串转换为布尔值？

曾经终败给现在 2023-03-05 13:29 264阅读 0赞

scala 转换为字符串

[String in Scala][] is a sequence of characters. In Scala, the String object is immutable.

[Scala][String in Scala]中的[String][String in Scala]是一个字符序列。 在Scala中，String对象是不可变的。

**Example:**

**例：**

String("includehelp.com")

A [Boolean][] is a [data type in Scala programming language][] (and another programming also), that is used or Boolean algebra. It has two valid values i.e. *true* and *false*.

[布尔值][Boolean]是[Scala编程语言][data type in Scala programming language] (也是另一种编程[语言][data type in Scala programming language] )中使用的[数据类型][data type in Scala programming language] ，它是布尔代数。 它具有两个有效值，即*true*和*false* 。

**Example:**

**例：**

var bool : Boolean = true;

## 将字符串转换为布尔值 **(**Convert string to boolean**)** ##

The conversion from string to boolean can be done using multiple methods,

从字符串到布尔值的转换可以使用多种方法完成，

1.  Boolean.parseBoolean()
    
    Boolean.parseBoolean()
2.  Boolean.valueOf()
    
    Boolean.valueOf()

**1) Convert string to boolean using Boolean.parseBoolean()**

**1)使用Boolean.parseBoolean()将字符串转换为布尔值**

**Syntax:**

**句法：**

Boolean.parseBoolean(String) : Boolean

### Scala程序使用Boolean.parseBoolean()将字符串转换为布尔值 **(**Scala program to convert String to Boolean using Boolean.parseBoolean()**)** ###

import java.lang.Boolean
    object MyClass {
        
        def main(args: Array[String]) {
        
             // For False values 
            println("String to Boolean for false values ")
            println(Boolean.parseBoolean("False"))
            println(Boolean.parseBoolean("false"))
            println(Boolean.parseBoolean("No"))
            println(Boolean.parseBoolean("FALSE"))
            
            // For Truth values 
            println("String to Boolean for false values ")
            println(Boolean.parseBoolean("True"))
            println(Boolean.parseBoolean("true"))
            println(Boolean.parseBoolean("TRUE"))
        }
    }

**Output:**

**输出：**

String to Boolean for false values 
    false
    false
    false
    false
    String to Boolean for false values 
    true
    true
    true

**2) Convert string to boolean using Boolean.valueOf()**

**2)使用Boolean.valueOf()将字符串转换为布尔值**

**Syntax:**

**句法：**

Boolean.valueOf(String) : Boolean

### Scala程序使用Boolean.valueOf()将字符串转换为布尔值 **(**Scala program to convert String to Boolean using Boolean.valueOf()**)** ###

import java.lang.Boolean
    object MyClass {
        
        def main(args: Array[String]) {
        
             // For False values 
            println("String to Boolean for false values ")
            println(Boolean.valueOf("False"))
            println(Boolean.valueOf("false"))
            println(Boolean.valueOf("No"))
            println(Boolean.valueOf("FALSE"))
            
            // For Truth values 
            println("String to Boolean for false values ")
            println(Boolean.valueOf("True"))
            println(Boolean.valueOf("true"))
            println(Boolean.valueOf("TRUE"))
        }
    }

**Output:**

**输出：**

String to Boolean for false values 
    false
    false
    false
    false
    String to Boolean for false values 
    true
    true
    true

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

scala 转换为字符串

[String in Scala]: https://www.includehelp.com/scala/strings-in-scala.aspx
[Boolean]: https://www.includehelp.com/scala/boolean-data-type-in-scala.aspx
[data type in Scala programming language]: https://www.includehelp.com/scala/data-types-in-scala.aspx
[https_www.includehelp.com_scala_convert-string-to-boolean-in-scala.aspx]: https://www.includehelp.com/scala/convert-string-to-boolean-in-scala.aspx