The get() method of List interface in Java is used to get the element present in this list at a given specific index.
Syntax :
E get(int index) Where, E is the type of element maintained by this List container.
Parameter : This method accepts a single parameter index of type integer which represents the index of the element in this list which is to be returned.
Return Value: It returns the element at the specified index in the given list.
Errors and exception : This method throws an IndexOutOfBoundsException if the index is out of range (index=size()).
Below programs illustrate the get() method:
Program 1 :
// Java code to demonstrate the working of // get() method in List import java.util.*;
public class GFG {
public static void main(String[] args)
{
// creating an Empty Integer List
List<Integer> arr = new ArrayList<Integer>( 4 );
// using add() to initialize values
// [10, 20, 30, 40]
arr.add( 10 );
arr.add( 20 );
arr.add( 30 );
arr.add( 40 );
System.out.println( "List: " + arr);
// element at index 2
int element = arr.get( 2 );
System.out.println( "The element at index 2 is " + element);
}
} |
List: [10, 20, 30, 40] The element at index 2 is 30
Program 2 : Program to demonstrate the error.
// Java code to demonstrate the error of // get() method in List import java.util.*;
public class GFG {
public static void main(String[] args)
{
// creating an Empty Integer List
List<Integer> arr = new ArrayList<Integer>( 4 );
// using add() to initialize values
// [10, 20, 30, 40]
arr.add( 10 );
arr.add( 20 );
arr.add( 30 );
arr.add( 40 );
try {
// Trying to access element at index 8
// which will throw an Exception
int element = arr.get( 8 );
}
catch (Exception e) {
System.out.println(e);
}
}
} |
java.lang.IndexOutOfBoundsException: Index: 8, Size: 4
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/List.html#get(int)