Java ArrayList remove() method

The remove() method of Java ArrayList class removes the first matching object in the ArrayList.

Syntax:

Parameter:

"object":It is the ArrayList element that will be removed if exist.

Return:

Return "true": If this list contained the specified object.

Example 1

import java.util.ArrayList;
public class ArrayListRemoveExample1
{
ArrayList<String> letters = new ArrayList<>();
letters.add("A");
letters.add("B");
letters.add("C");
letters.add("D");
letters.add("E");
System.out.println(letters);			// [A, B, C, D, E]
System.out.println(letters .remove("C")); 	// prints true
System.out.println(letters);			// [A, B, D, E]
}

Test it Now

Output:

[A, B, C, D, E]

true

[A, B, D, E]

Example 2

import java.util.ArrayList;
public class ArrayListRemoveExample2
{
ArrayList<String> birds = new ArrayList<>();
birds.add("Parrot");
birds.add("Owl");
birds.add("Swallow");
System.out.println(birds);		// [Parrot, Owl, Swallow]
System.out.println(birds .remove("Heron")); // prints false
System.out.println(birds);		// [Parrot, Owl, Swallow]
}

Test it Now

Output:

[Parrot, Owl, Swallow]

false

[Parrot, Owl, Swallow]

Java ArrayList remove(int index) method

The remove (int index) method of Java ArrayListclass removes an element of specified index of the ArrayList.

Syntax:
public E remove (int index)
Parameter:
"index": index of the element that will be removed.
Return:
Return "E": the element that was removed from the list.
Example 3
import java.util.ArrayList; public class ArrayListRemoveExample3{ public static void main(String[] args){ List<String> colors = new ArrayList<>(); colors.add("red"); // ["red"] colors.add("blue"); // ["red" , "blue"] colors.remove(0); // return "red" System.out.println(colors.remove(0)); // print "blue" System.out.println(colors); // [] } }
Test it Now
Output:
[]
Example 4
public class ArrayListRemoveExample2{ import java.util.ArrayList; public static void main(String[] args){ List<Object> list = new ArrayList<>(); list.add(0, "e1"); // ["e1"] list.add(1); // ["e1" , 1] System.out.println(list.remove(0)); // print "e1" System.out.println(list); // [1] } }
Test it Now
Output:
[1]
Example 5
import java.util.ArrayList; public class ArrayListRemoveExample5{ public static void main(String[] args){ List<String> countries = new ArrayList<>(); countries.add(0, "USA"); // ["USA"] countries.add(1, "England"); // ["USA", "England"] countries.remove(2); // throws IndexOutOfBoundsException } }
Test it Now
Output:
throwsIndexOutOfBoundsException

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