Java - How to create an ArrayList from an Array?
In this section, we will show you how to create an ArrayList from an Array.
Following ways can be used for converting Array to ArrayList:
- By using Arrays.asList() method
- By using Collections.addAll() method
- By adding each element of the Array to ArrayList explicitly
Example 1: By using Arrays.asList() method
Using asList() method from an Arrays class will convert the given Array to an ArrayList.
import java.util.ArrayList;
import java.util.Arrays;
public class Main {
public static void main(String []args)
{
String [] strArray =
{"Java", "Kotlin", "C", "Go", "Python"};
ArrayList<String> list =
new ArrayList<String>(Arrays.asList(strArray));
System.out.println(list);
}
}
Console Output:
[Java, Kotlin, C, Go, Python]Example 2: By using Collections.addAll() method
Using addAll() method from the Collections class will convert Arrays to Arraylist. We pass two parameters to the addAll method that is ArrayList and Array.
import java.util.ArrayList;
import java.util.Collections;
public class Main {
public static void main(String []args)
{
String [] strArray =
{"Java", "Kotlin", "C", "Go", "Python"};
ArrayList<String> list= new ArrayList<String>();
Collections.addAll(list, strArray);
System.out.println(list);
}
}
import java.util.ArrayList;
import java.util.Collections;
public class Main {
public static void main(String []args)
{
String [] strArray =
{"Java", "Kotlin", "C", "Go", "Python"};
ArrayList<String> list= new ArrayList<String>();
Collections.addAll(list, strArray);
System.out.println(list);
}
}
Console Output:
[Java, Kotlin, C, Go, Python]Example 3: By adding each element of the array to ArrayList explicitly
import java.util.ArrayList;
public class Main {
public static void main(String []args)
{
String [] strArray =
{"Java", "Kotlin", "C", "Go", "Python"};
ArrayList<String> list= new ArrayList<String>();
for(int i =0;i<strArray.length;i++)
{
list.add(strArray[i]);
}
System.out.println(list);
}
}
Console Output:
[Java, Kotlin, C, Go, Python]
