For staters. List#remove(index) returns the Object removed from the list. List#remove(Object) returns a boolean.
In this special case however. you could do .
ArrayList<Integer> list = new ArrayList <Integer> ();
list.add (0);
list.add (1);
System.out.println(list.remove(new Integer(0)));
Oracle
docs.oracle.com › javase › 8 › docs › api › java › util › ArrayList.html
ArrayList (Java Platform SE 8 )
July 21, 2026 - An application can use this operation to minimize the storage of an ArrayList instance.
W3Schools
w3schools.com › java › ref_arraylist_remove.asp
Java ArrayList remove() Method
Remove an integer from the list by position and by value: import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<Integer> list = new ArrayList<Integer>(); list.add(5); list.add(8); list.add(9); list.add(1); list.remove(Integer.valueOf(1)); // Remove by object list.remove(1); // Remove by index System.out.println(list); } }
How does an ArrayList remove an element from an array?
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March 15, 2023How do I remove an object from an arraylist and delete it in java?
What sort of error does it give you? Also, don't use indexOf(foo) just to find the index of the thing you want to delete. Just do remove(foo). More on reddit.com
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March 11, 2021Search And Remove From ArrayLists (Java Tutorial)
12:00
remove method in ArrayList - YouTube
09:01
Remove elements from an arraylist in Java - YouTube
15:05
Learn Java Programming - ArrayList removeAll Method Tutorial - YouTube
12:35
Learn Java Programming - ArrayList remove Method Tutorial - YouTube
#112 Java Remove ArrayList Element
Coderanch
coderanch.com › t › 750418 › java › Remove-element-ArrayList-List-loop
Remove the element of ArrayList and List in for-loop indexes? (Java in General forum at Coderanch)
March 22, 2022 - All of these start with a list of values from 1 to SIZE, and then remove all odd values. Try changing the value of SIZE to see how much it can affect things. Note that the differences between several options are too small to measure accurately, unless you increase SIZE quite a bit... but the crappy answers like the one given on Stack Overflow are way too slow to handle much larger lists... I tested the code you sent. Using get(index) with List is a bad thing, but it brings better performance with ArrayList.
Reddit
reddit.com › r/javahelp › how does an arraylist remove an element from an array?
r/javahelp on Reddit: How does an ArrayList remove an element from an array?
March 15, 2023 -
Is it as simple as creating another array and moving all of the elements except the one to be deleted over?
Top answer 1 of 4
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An ArrayList never shrinks. The size of an ArrayList does not always refer to the size of the underlying array. Instead it defines the number of accessible elements in that array. When removing an element that is not the last element in the list, the part of the array after the removed element will be shifted to fill the gap. After that the underlying array has one more slot with a null value at the end. The size of the ArrayList will be reduced by one. You can also look at the source code: public E remove(int index) { Objects.checkIndex(index, size); final Object[] es = elementData; @SuppressWarnings("unchecked") E oldValue = (E) es[index]; fastRemove(es, index); return oldValue; } private void fastRemove(Object[] es, int i) { modCount++; final int newSize; if ((newSize = size - 1) > i) System.arraycopy(es, i + 1, es, i, newSize - i); es[size = newSize] = null; }
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7
A new array isn't created. The remaining elements are moved. One of the great things about open source is you can see for yourself how things are done.
GeeksforGeeks
geeksforgeeks.org › java › remove-element-arraylist-java
How to remove an element from ArrayList in Java? - GeeksforGeeks
July 23, 2025 - ArrayList class provides two overloaded remove() methods.
Microsoft Learn
learn.microsoft.com › en-us › dotnet › api › system.collections.arraylist.remove
ArrayList.Remove(Object) Method (System.Collections) | Microsoft Learn
Removes the first occurrence of a specific object from the ArrayList.
Top answer 1 of 4
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For staters. List#remove(index) returns the Object removed from the list. List#remove(Object) returns a boolean.
In this special case however. you could do .
ArrayList<Integer> list = new ArrayList <Integer> ();
list.add (0);
list.add (1);
System.out.println(list.remove(new Integer(0)));
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2
If it is just the ambiguity with the remove() method in Integer ArrayList is bothering you, you can extend the ArrayList to implement your own :
public class MyIntArrayList extends ArrayList<Integer> {
boolean removeByObject(Integer intObj) {
return super.remove(intObj);
}
Integer removeByIndex(int index) {
return super.remove(index);
}
}
DigitalOcean
digitalocean.com › community › tutorials › java-list-remove-methods-arraylist-remove
How To Use remove() Methods for Java List and ArrayList | DigitalOcean
Learn how to use the remove() method in Java’s List and ArrayList interfaces with examples for removing by index or object.
GeeksforGeeks
geeksforgeeks.org › java › removing-element-from-the-specified-index-in-java-arraylist
Removing Element from the Specified Index in Java ArrayList - GeeksforGeeks
March 31, 2023 - The remove(int index) method present in java.util.ArrayList class removes the element at the specified position in this list and shifts any subsequent elements to the left (i.e.
CodeGym
codegym.cc › java blog › java collections › arraylist removeall() method in java
ArrayList removeAll() method in Java
January 7, 2025 - The remove(int index) method in the ArrayList class removes the element at the specified index. The indices of subsequent elements are shifted to fill the gap.
Scaler
scaler.com › home › topics › remove() in java
remove() in Java - Scaler Topics
April 7, 2024 - The remove method takes a single parameter. obj: The object in the ArrayList is to be removed.
Java67
java67.com › 2015 › 06 › how-to-remove-elements-from-arraylist.html
How to Delete Objects from ArrayList in Java? ArrayList.remove() method Example | Java67
There are actually two methods to remove an existing element from ArrayList, first by using the remove(int index) method, which removes elements with a given index, remember the index starts with zero in ArrayList.
W3Schools
w3schools.com › JAVA › ref_arraylist_removeif.asp
Java ArrayList removeIf() Method
The removeIf() method removes all elements from this list for which a condition is satisfied.
TutorialsPoint
tutorialspoint.com › javaexamples › array_removeall.htm
Removing Elements from an ArrayList in Java
The removeAll(Collection<?> c) method in ArrayList removes all elements shared between the ArrayList and the specified collection.
Just Academy
justacademy.co › blog-detail › how-to-remove-element-from-arraylist-in-java
How To Remove Element From ArrayList In Java by Roshan Chaturvedi | JustAcademy
1 - Use the remove() method: In Java, you can remove an element from an ArrayList by using the remove() method.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array
Array - JavaScript | MDN
July 28, 2026 - Removes the first element from an array and returns that element.
W3Schools
w3schools.com › java › java_arraylist.asp
Java ArrayList
The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one).
LeetCode
leetcode.com › problems › find-all-duplicates-in-an-array
Find All Duplicates in an Array - LeetCode
Can you solve this real interview question? Find All Duplicates in an Array - Given an integer array nums of length n where all the integers of nums are in the range [1, n] and each integer appears at most twice, return an array of all the integers that appears twice.
Reddit
reddit.com › r/learnprogramming › how do i remove an object from an arraylist and delete it in java?
r/learnprogramming on Reddit: How do I remove an object from an arraylist and delete it in java?
March 11, 2021 -
So, basically I want to do a shopping list that you can put the price, quantity, name. I want to implement a button that deletes an object. I have tried doing "int s = objectList.indexOf(myobject); objectList.remove(s); myobject=null;", but it keeps giving me errors. Please help me, if you need any code from my project, I will give it. Btw, the object extends JPanel
Vultr
docs.vultr.com › java › standard library › java › util › arraylist › removeall()
Java ArrayList removeAll() - Remove Specified Elements
September 27, 2024 - The removeAll() method in Java's ArrayList class is a powerful tool for removing multiple elements from a list simultaneously based on the contents of another collection.