Java LinkedList spliterator()方法

LinkedList 的 spliterator() 方法会返回一个 Spliterator ，该 Spliterator 与LinkedList的元素相同，具有晚期绑定和故障快速性。晚期绑定的Spliterator是指在第一次遍历、第一次拆分或第一次查询估计大小的时候绑定到LinkedList的元素源，而不是在创建Spliterator的时候。它可以在Java 8中与Streams一起使用。同时，它也可以单独或批量地遍历元素。Spliterator是遍历元素的更好方法，因为它提供了对元素的更多控制。

语法

public Spliterator<E> spliterator()

返回： 该方法在LinkedList的元素上返回一个 Spliterator 。

下面的程序说明了LinkedList的splitator()方法。

例子1： 演示LinkedList的splitator()方法，该方法包含一个对象的列表。

// Java Program Demonstrate spliterator()
// method of LinkedList
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create an LinkedList which going to
        // contains a list of numbers
        LinkedList<Shape> shapes = new LinkedList<Shape>();
  
        // Add different shape to linkedlist
        shapes.add(new Shape("Circle", 234));
        shapes.add(new Shape("Square", 225));
        shapes.add(new Shape("Cone", 543));
        shapes.add(new Shape("Rectangle", 342));
  
        // create Spliterator of LinkedList
        // using spliterator() method
        Spliterator<Shape> spliter = shapes.spliterator();
  
        // print result from Spliterator
        System.out.println("list of Shapes:");
  
        // forEachRemaining method of Spliterator
        spliter.forEachRemaining((Value) -> printDetails(Value));
    }
  
    // print details
    public static void printDetails(Shape s)
    {
        System.out.println("************************");
        System.out.println("Shape Name : " + s.shapename);
        System.out.println("Shape Area : " + s.area);
    }
}
  
// create a shape class
class Shape {
  
    // shape class has two attributes
    String shapename;
    int area;
  
    public Shape(String shapename, int area)
    {
        super();
        this.shapename = shapename;
        this.area = area;
    }
}

输出:

list of Shapes:
************************
Shape Name : Circle
Shape Area : 234
************************
Shape Name : Square
Shape Area : 225
************************
Shape Name : Cone
Shape Area : 543
************************
Shape Name : Rectangle
Shape Area : 342

例2： 在包含电影名称列表的LinkedList上演示spliterator()方法。

// Java Program Demonstrate spliterator()
// method of LinkedList
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create an LinkedList which going to
        // contains a list of Movie names which is actually
        // string values
        LinkedList<String> NameOfMovies = new LinkedList<String>();
  
        // Add Strings to list
        // each string represents city name
        NameOfMovies.add("Delhi 6");
        NameOfMovies.add("3 Idiots");
        NameOfMovies.add("Stree");
        NameOfMovies.add("Airlift");
  
        // using spliterator() method
        Spliterator<String> names = NameOfMovies.spliterator();
  
        // print result from Spliterator
        System.out.println("list of Movies:");
  
        // forEachRemaining method of Spliterator
        names.forEachRemaining((n) -> System.out.println("Movie Name: " + n));
    }
}

输出:

list of Movies:
Movie Name: Delhi 6
Movie Name: 3 Idiots
Movie Name: Stree
Movie Name: Airlift

参考资料: https://docs.oracle.com/javase/8/docs/api/java/util/LinkedList.html#spliterator-