The asList() method of java.util.Arrays class is used to return a fixed-size list backed by the specified array.
This method acts as bridge between array-based and collection-based APIs, in combination with Collection.toArray(). The returned list is serializable and implements RandomAccess.
Syntax:
public static List asList(T... a)
Parameters: This method takes the array a which is required to be converted into a List.
Return Value: This method returns a list view of the specified array.
Below are the examples to illustrate the asList() method.
Example 1:
// Java program to demonstrate // asList() method for String value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // creating Arrays of String type String a[] = new String[] { "A", "B", "C", "D" }; // getting the list view of Array List<String> list = Arrays.asList(a); // printing the list System.out.println("The list is: " + list); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } } } |
The list is: [A, B, C, D]
Example 2:
// Java program to demonstrate // asList() method for Integer value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // creating Arrays of Integer type Integer a[] = new Integer[] { 10, 20, 30, 40 }; // getting the list view of Array List<Integer> list = Arrays.asList(a); // printing the list System.out.println("The list is: " + list); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } } } |
The list is: [10, 20, 30, 40]
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