ArrayList retainAll() method in Java
The Java.util.ArrayList.retainAll() method is used to remove all the array list’s elements that are not contained in the specified collection or retains all matching elements… Read More »
Tag Archives: Java-ArrayList
ArrayList clear() in Java with examples
The clear() method is used to remove all the elements from a list. The list will be empty after this call returns. Syntax : clear()… Read More »
Arraylist.contains() in Java
ArrayList contains() method in Java is used for checking if the specified element exists in the given list or not. Syntax: public boolean contains(Object) object-element… Read More »
ArrayList trimToSize() in Java with example
The trimToSize() method in Java trims the capacity of an ArrayList instance to be the list’s current size. This method is used to trim an… Read More »
ArrayList isEmpty() in Java with example
The isEmpty() method in java is used to check if a list is empty or not. It returns true if the list contains no elements… Read More »
Sum of list with stream filter in Java
We generally iterate through the list for addition of integers in a range, but ava.util.stream.Stream has sum() method when used with filter() gives the required… Read More »
Arraylist lastIndexOf() in Java with example
The lastIndexOf() method in Java is used to get the index of the last occurrence of an element in an ArrayList object. Syntax : lastIndexOf(element)… Read More »
Arraylist removeRange() in Java with examples
The removeRange() method in Java is used to remove all elements within the specified range from an ArrayList object. It shifts any succeeding elements to… Read More »
ArrayList get(index) method in Java with examples
The get() method in Java is used to get the element of a specified index within the list. Syntax : get(index) Parameter : index:index of… Read More »
List to Set in Java
Given a list (ArrayList or LinkedList), convert it into a set (HashSet or TreeSet) of strings in Java. Method 1 (Simple) We simply create an… Read More »
Set to List in Java
Given a set (HashSet or TreeSet) of strings in Java, convert it into a list (ArrayList or LinkedList) of strings. Input : Set hash_Set =… Read More »
Ludic Numbers
Ludic numbers are obtained by considering list of natural numbers (starting from 2) and removing i-th number in i-th iteration (where i begins with 2).… Read More »
Difference between ArrayList and CopyOnWriteArrayList
Both ArrayList and CopyOnWriteArray implement List interface. But There are lots of differences between ArrayList and CopyOnWriteArrayList: CopyOnWriteArrayList creates a Cloned copy of underlying ArrayList,… Read More »
CopyOnWriteArrayList in java
CopyOnWriteArrayList: CopyOnWriteArrayList class is introduced in JDK 1.5, which implements List interface. It is enhanced version of ArrayList in which all modifications (add, set, remove,… Read More »
Java.util.Arraylist.indexOf() in Java
This method returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the… Read More »