Java ArrayList remove() method with Examples

by Online Tutorials Library July 22, 2022

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:

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

Next TopicJava ArrayList

add()addAll()arraylist clear()clone()contains()ensureCapacity()get indexOf()isempty()iterator java lastIndexOf()ListIterator remove removeall subList()toArray()trimToSize()

Java ArrayList remove() method with Examples

Java ArrayList remove() method

Syntax:

Parameter:

Return:

Example 1

Example 2

Java ArrayList remove(int index) method

Syntax:

Parameter:

Return:

Example 3

Example 4

Example 5

Java ThreadLocalRandom setSeed() Method with Examples

Java Boolean toString() Method with Examples

You may also like