Java Random nextLong() 方法

2024年11月3日 | 阅读 2 分钟

Random 类的 nextLong() 方法从此随机数生成器的序列中返回下一个伪随机、均匀分布的 long 值。

语法

参数

不适用

返回值

nextLong() 方法返回下一个伪随机、均匀分布的 long 值。

示例 1

import java.util.Random;
public class JavaRandomNextLongExample1{
public static void main(String[] args) {
      Random random = new Random();
//return the next pseudorandom long value
Long val = random.nextLong();
System.out.println("Random Integer value : "+val);
      Long val1 = random.nextLong();
System.out.println("Random Integer value : "+val1);
   }
}

输出

Random Integer value : 3977537424970713389
Random Integer value : 5733671541347552387

示例 2

import java.util.Random;
public class JavaRandomNextLongExample2 {
public static void main(String[] args) {
      Random random = new Random();
for (double i=0;i<5;i++) {
//return the next pseudorandom Gaussian value
Long val =random.nextLong();
System.out.println(val+" ");
      }
   }
}

输出

7543819037091046117 
-3342512197386667364 
-4465337898535811745 
2349346495373509042 
-6952569592634674749

示例 3

import java.util.Iterator;
import java.util.Random;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
public class JavaRandomNextLongExample3 {
public static void main(String[] args) {
        Employee employee1 = new Employee("Reema     ", "Panda   ", "reemapanda18@gamil.com        ");
        Employee employee2 = new Employee("Geetanjali", "Sharma  ", "geetanjaliSharma28@gamil.com  ");
        Employee employee3 = new Employee("Vineet    ", "Tanjea  ", "VineetTanjea56@gamil.com      ");
        Employee employee4 = new Employee("Himanshu  ", "Bhardwaj", "himanshubhardwaj0604@gamil.com");
int capacity = 100;
BlockingQueue<Employee> queue = new ArrayBlockingQueue<Employee>(capacity);
queue.add(employee1);
queue.add(employee2);
queue.add(employee3);
queue.add(employee4);
        Iterator<Employee> iterator = queue.iterator();
        Random random = new Random();
////Returns an iterator over the elements
while(iterator.hasNext()){
            Long val =random.nextLong();
System.out.print(iterator.next());
System.out.print(val);
System.out.println();
        }
    }
}
class Employee{
private String f_name;
private String l_name;
private String email;

public Employee(String f_name, String l_name, String email) {
this.f_name= f_name;
this.l_name= l_name;
this.email= email;
    }
public String toString(){
return "FirstName-"+f_name+" :  LastName-" +l_name+" : Email-"+email+" : Id-";
    }
}

输出

FirstName-Reema      :  LastName-Panda    : [email protected]         : Id--6149450654700259232
FirstName-Geetanjali :  LastName-Sharma   : [email protected]   : Id--1351029507738091616
FirstName-Vineet     :  LastName-Tanjea   : [email protected]       : Id--2724724873264125475
FirstName-Himanshu   :  LastName-Bhardwaj : [email protected] : Id--2199305912644374368

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Java Random nextLong() 方法

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Java Random nextLong() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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