Array Vs ArrayList in Java
Both Array and ArrayList are very important and frequently used data structures in Java. The main difference between Array Vs ArrayList is that Array is...
Category: java.util
Filter a List with Stream in Java
To filter a List in java before Java 8 requires iterating through a complete list and needs us to write many lines of code. After...
Java Iterator examples
Here are few Java Iterator examples for your reference. Below are the three ways to iterate a List or Set in Java – iterator.hasNext()iterator.forEachRemaining() methodListIterator 1....
Convert Iterator to Stream – Java 8
There are 2 ways to convert an Iterator to Stream in Java 8 – Use StreamSupport.stream to convert Iterator into a StreamUse StreamSupport.stream with Spliterator parameter 1. Iterator to Stream The Iterator interface has no spliterator() method. We...
Key or Value exists in a Map Check [How To]?
In this tutorial, we will see how to check if Key or Value exists in a Map. Map or HashMap is the java collection class...
How to generate pseudo-random numbers in Java?
In this post, we will see how to use the pseudo-random number generator in Java. Before that, we will see what is Random numbers. Random...
What is the difference between HashTable and HashMap in Java?
Both HashTable and HashMap are java collections and implements java.util.Map interface. Difference between HashTable and HashMap is the most common interview question. Many of the...
How to Sort a Map by key in Java?
Here we will see how to sort a Map by key in java. There are two ways to sort a Map by Key - First...
How to use Preferences API to store application/Program configurations ?
Introduction Preferences (Java.util.pref) API is included in JDK can be used to remember and retrieve application preferences. Using this API you can manage preference data...
How to convert Array to List in java?
Below code example show how to convert an array to List in java. To convert array based data into list, we can use java.util.Arrays class....
How to convert an array into a collection object?
Below java code example shows how to convert an array into a Collection object. To convert array-based data into list/collection, we can use java.util.Arrays class....
How to get Date/Day, Month and Year of the current date?
Below java code example shows how to get date, month and year from the current date /**************************************************************************************** * Created on 10-2011 Copyright(c) https://kodehelp.com All Rights...
How to convert String to Date in java?
Below code shows how to convert String to Date in java. It converts String Object to java.util.Date /**************************************************************************************** * Created on 10-2011Copyright(c) https://kodehelp.com All Rights...