将LinkedList转换成数组,反之亦然Java程序
在本文中,我们将学习如何将LinkedList转换成数组,以及反之亦然。java.util.LinkedList类的操作符合我们对双向链表的预期。索引进入列表的操作将从起始或结束遍历列表,以距离指定索引更近者为准。
下面是一个演示 −
假设我们的输入是 −
The list is defined as: [Java, Python, Scala, Mysql]
期望的输出将是 −
The result array is: Java Python Scala Mysql
算法
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,我们将列表转换成一个数组。
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,我们将数组转换成一个列表。
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]
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