Java 将LinkedList转换为数组

在本文中，我们将了解如何将LinkedList转换为数组，反之亦然。 java.util.LinkedList类操作是我们可以期望的双向链表。 对列表进行索引的操作将从开头或结尾遍历列表，取决于离指定索引更近的位置。

以下是同样的演示−

假设我们的输入是 −

The list is defined as: [Java, Python, Scala, Mysql]

期望的输出将会是 －

The result array is: Java Python Scala Mysql

步骤

Step 1 - START
Step 2 - Declare namely
Step 3 - Define the values.
Step 4 - Create a list and add elements to it using the ‘add’ method.
Step 5 - Display the list on the console.
Step 6 - Create another empty list of previous list size.
Step 7 - Convert it into array using the ‘toArray’ method.
Step 8 - Iterate over the array and display the elements on the console.
Step 9 - Stop

示例1

在这里，我们将列表转换为数组。

import java.util.LinkedList;
public class Demo {
   public static void main(String[] args) {
      System.out.println("The required packages have been imported");
      LinkedList<String> input_list= new LinkedList<>();
      input_list.add("Java");
      input_list.add("Python");
      input_list.add("Scala");
      input_list.add("Mysql");
      System.out.println("The list is defined as: " + input_list);
      String[] result_array = new String[input_list.size()];
      input_list.toArray(result_array);
      System.out.print("\nThe result array is: ");
      for(String elements:result_array) {
         System.out.print(elements+" ");
      }
   }
}

输出

The required packages have been imported
The list is defined as: [Java, Python, Scala, Mysql]

The result array is: Java Python Scala Mysql

示例2

在这里，我们将一个数组转换为列表。

import java.util.Arrays;
import java.util.LinkedList;
public class Demo {
   public static void main(String[] args) {
      System.out.println("The required packages have been imported");
      String[] result_array = {"Java", "Python", "Scala", "Mysql"};
      System.out.println("The elements of the result_array are defined as: " + Arrays.toString(result_array));
      LinkedList<String> result_list= new LinkedList<>(Arrays.asList(result_array));
      System.out.println("\nThe elements of the result list are: " + result_list);
   }
}

输出

The required packages have been imported
The elements of the result_array are defined as: [Java, Python, Scala, Mysql]

The elements of the result list are: [Java, Python, Scala, Mysql]