How to convert List of Integers to int array in Java - Coding Tips

So, you have a List of Integers and you want to convert them into int array? Yes you read it write, not on Integer array but int array . Th...

How to use ConcurrentHashMap in Java - Example Tutorial and Working

ConcurrentHashMap in Java is introduced as an alternative of Hashtable in Java 1.5 as part of Java concurrency package. Prior to Java 1.5 if...

Top 5 Concurrent Collections from JDK 5 and 6 Java Programmer Should Know

Several new Collection classes are added in Java 5 and Java 6 specially concurrent alternatives of standard synchronized ArrayList , Hashtab...

Difference between IdentityHashMap and HashMap in Java

IdentityHashMap in Java was added in Java 1.4 but still its one of those lessor known class in Java. Main difference between IdentityHashMap...

What is NavigableMap in Java 6 - Creating subMap from Map with Example

NavigableMap in Java 6 is an extension of SortedMap   like TreeMap which provides convenient navigation method like lowerKey , floorKey , ...

How to compare Arrays in Java – Equals vs deepEquals Example

java.util.Arrays class provides equals() and deepEquals() method to compare two Arrays in Java. Both of these are overloaded method to c...

3 Example to print array values in Java - toString and deepToString from Arrays

Printing array values in Java or values of array element in Java would have been much easier if   arrays are allowed to directly prints its ...

How to initialize List with Array in Java - One Liner Example

Initializing list while declaring it is very convenient for quick use. If you have been using Java programming language for quite some time ...

How to remove duplicates elements from ArrayList in Java

You can remove duplicates or repeated elements from ArrayList in Java by converting ArrayList into HashSet in Java . but before doing that j...

How to sort HashMap by key and value in Java - Hashtable, Map Example Tutorial

Sorting HashMap in Java is not as easy as it sounds because unfortunately Java API doesn't provide any utility method to sort HashMap ba...

Union and Intersection of two Set in Java - Google Guava Example

Google Guava is an open source library which provides lots of useful utility to Java programmer,   one of them is easy way to find intersec...

BlockingQueue in Java – ArrayBlockingQueue vs LinkedBlockingQueue Example program Tutorial

BlockingQueue in Java is added in Java 1.5 along with various other concurrent Utility classes like ConcurrentHashMap , Counting Semaphore ...

Difference between TreeSet, LinkedHashSet and HashSet in Java with Example

TreeSet , LinkedHashSet and HashSet all are implementation of Set interface and by virtue of that, they follows contract of Set interface...

4 ways to search Java Array to find an element or object - Tutorial Example

Searching in Java Array sounds familiar? should be,   because its one of frequently used operations in Java programming. Array is an index b...

Difference between EnumMap and HashMap in Java

HashMap vs EnumMap in Java What is difference between EnumMap and HashMap in Java is the latest Java collection interview question which ha...

What is EnumMap in Java – Example Tutorial

What is EnumMap in Java EnumMap in Java is added on JDK   5 release along with other important features like   Autoboxing , varargs and Gen...

How to Convert Collection to String in Java - Spring Framework Example

How to convert Collection to String in Java Many times we need to convert any Collection like Set or List into String like comma separate...

3 example of converting array to ArrayList and ArrayList to array in Java program

How to change from array to ArrayList and ArrayList to array in java Have you encountered any situation where you quickly wanted to convert ...