Java Random nextDouble（）方法与示例

柔情只为你懂 2023-03-05 15:55 11阅读 0赞

## 随机类别的nextDouble()方法 **(**Random Class nextDouble() method**)** ##

*  **nextDouble() method** is available in java.util package.
    
    **nextDouble()方法**在java.util包中可用。
 *  **nextDouble() method** is used to generate the next pseudo-random double value between the range 0.0 and 1.0 from this Random Value Generator.
    
    **nextDouble()方法**用于从此随机值生成器生成介于0.0和1.0之间的下一个伪随机双精度值。
 *  **nextDouble() method** is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
    
    **nextDouble()方法**是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
 *  **nextDouble() method** does not throw an exception at the time of returning double.
    
    返回double时， **nextDouble()方法**不会引发异常。

**Syntax:**

**句法：**

public double nextDouble();

**Parameter(s):**

**参数：**

*  It does not accept any parameter.
    
    它不接受任何参数。

**Return value:**

**返回值：**

The return type of the method is double, it returns next pseudo-random distributed double value between the given range from this Random Generator.

方法的返回类型为double ，它从此Random Generator返回给定范围之间的下一个伪随机分布double值。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of double nextDouble() method of 
    // Random
    
    import java.util.*;
    
    public class NextDoubleOfRandom {
        
     public static void main(String args[]) {
        
      // Instantiates Random object
      Random ran = new Random();
    
      // By using nextDouble() method is
      // to return double pseudo-random
      // value between 0.0 and 1.0 by
      // using Random Value Generator
      double val = ran.nextDouble();
    
      // Display 
      System.out.println("ran.nextDouble(): " + val);
     }
    }

**Output**

**输出量**

RUN 1:
    ran.nextDouble(): 0.663707914081102
    
    RUN 2:
    ran.nextDouble(): 0.37675184205154066
    
    RUN 3:
    ran.nextDouble(): 0.3770186607832615

> 翻译自: [https://www.includehelp.com/java/random-nextdouble-method-with-example.aspx][https_www.includehelp.com_java_random-nextdouble-method-with-example.aspx]

[https_www.includehelp.com_java_random-nextdouble-method-with-example.aspx]: https://www.includehelp.com/java/random-nextdouble-method-with-example.aspx