How to Clone a Map in Java
Given a map, the task is to clone that map. Following are the 5 different ways to Clone a Map in Java. Example: {1=Geeks, 2=For,… Read More »
Given a map, the task is to clone that map. Following are the 5 different ways to Clone a Map in Java. Example: {1=Geeks, 2=For,… Read More »
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 »
By default TreeMap elements in Java are sorted in ascending order of keys. However, we can create the TreeMap in reverse order using Collections.reverseOrder() method… Read More »
Given a HashMap and a key in Java, the task is to check if this key exists in the HashMap or not. Examples: Input: HashMap:… Read More »
HashSet is implementation of Set Interface which does not allow duplicate value. The main thing is, objects that are stored in HashSet must override equals()… Read More »
Given a HashMap and a value in Java, the task is to remove an entry from this HashMap using the value, while iterating over it.… Read More »
Given a HashMap and a key in Java, the task is to remove an entry from this HashMap using the key, while iterating over it.… Read More »
Given a Stream of Map in Java, the task is to Flatten the Stream using forEach() method. Examples: Input: map = {1=[1, 2], 2=[3, 4,… Read More »
Given a Map with null values in it, the task is to replace all the null values with a default value. Examples: Input: map =… Read More »
The List is a child interface of Collection. It is an ordered collection of objects in which duplicate values can be stored. Since List preserves… Read More »
Given an integer array, sort the array according to the frequency of elements in decreasing order, if frequency of two elements are same then sort… Read More »
Given example shows how to sort user defined objects TreeMap, you can sort the keys based on the logic provided inside the method. Given a… Read More »
HashMap is a part of Java’s collection since Java 1.2. It provides the basic implementation of Map interface of Java which stores the data in… Read More »
HashMap is a part of the java collections framework. It internally uses hashing technique. This post contains different ways of traversing through a HashMap, which… Read More »
HashMap is a part of java.util package.HashMap extends an abstract class AbstractMap which also provides an incomplete implementation of Map interface. It stores the data… Read More »