Graph Representation using Java ArrayList
Prerequisite : Graph and its representations In this article, we will be discussing Adjacency List representation of Graph using ArrayList in Java. Following is adjacency… Read More »
Tag Archives: Java-ArrayList
Sort ugly numbers in an array at their relative positions
Given an integer array arr[], the task is to sort only those elements which are ugly numbers at their relative positions in the array (positions… Read More »
Java Program to print distinct permutations of a string
Given a string str, the task is to print all the distinct permutations of str. A permutation is an arrangement of all or part of… Read More »
Java ArrayList to print all possible words from phone digits
Given a keypad of a mobile, and keys that need to be pressed, the task is to print all the words which are possible to… Read More »
Print all permutation of a string using ArrayList
Given a string str, the task is to print all the permutations of str. A permutation is an arrangement of all or part of a… Read More »
Print all subsequences of a string using ArrayList
Given a string str, the task is to print all the sub-sequences of str. A subsequence is a sequence that can be derived from another… Read More »
ArrayList toArray() method in Java with Examples
The toArray() method of ArrayList is used to return an array containing all the elements in ArrayList in the correct order. Syntax: public Object[] toArray()… Read More »
ArrayList clone() method in Java with Examples
The Java.util.ArrayList.clone() method is used to create a shallow copy of the mentioned array list. It just creates a copy of the list. Syntax: ArrayList.clone()… Read More »
ArrayList iterator() method in Java with Examples
The iterator() method of ArrayList class in Java Collection Framework is used to get an iterator over the elements in this list in proper sequence.… Read More »
Ceiling in right side for every element in an array
Given an array of integers, find the closest greater element for every element. If there is no greater element then print -1 Examples: Input :… Read More »
ArrayList vs. HashMap in Java
ArrayList is a part of collection framework and is present in java.util package. It provides us dynamic arrays in Java. Though, it may be slower… Read More »
Remove all occurrences of an element from Array in Java
Given an array and a key, the task is to remove all occurrences of the specified key from the array in Java. Examples: Input: array… Read More »
Difference between ArrayList and HashSet in Java
Here are couple of differences between ArrayList and HashSet. Inheritance: Implementation: Implementation : ArrayList implements List interface while HashSet implements Set interface in Java. Internal… Read More »
Get first and last elements from ArrayList in Java
Given an array list, find the first and last elements of it. Examples: Input : aList = {10, 30, 20, 14, 2} Output : First… Read More »
Reverse an array in Java
Reversing an array in java can be done in three simple methods. Examples: Input : 1, 2, 3, 4, 5 Output :5, 4, 3, 2,… Read More »
