Core java

In this post, we will see how to get extension of file in java. As java.io.File does not provide any direct method for getting extension of file. This is used when you want to process file differently on the basis of its extension. I have worked on a project where I required this utility method. […]

In this post, we will see how to convert String to Date object in java. It is used when we have formatted String and need to convert it to Date object.You may also check how to convert Date to String Java program: [crayon-6a29e001b3b3b303213371/] When you run above program, you will get following output: [crayon-6a29e001b3b47074727820/]

In this post, we will see how to convert date to string in java. It is more of utility which is mostly used while displaying dates in different string formats while generating any pdf or excel reports.You may also check how to convert string to date Java program: [crayon-6a29e001b430b666620567/] When you run above program, you […]

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In this post, we will see how to find Greatest common divisor(GCD) and Least Common Multiple(LCM) in java. GCD is calculated using Euclidean algorithm and LCM is calculated using reduction by GCD Eucid algo for calculating GCD is: Lets say , there are two numbers , a and b so GCD of two numbers = […]

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BlockingQueue is introduced in java with concurrent package with ConcurrentHashMap. It is thread safe queue to put and take elements from it. BlockingQueue is special type of queue which is used when one thread produces object and another thread consumes it. Producer thread will keep inserting objects to queue until it reaches upper limit. Once […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview questions. Java Linked List Interview Programs: How to reverse a linked list in java How to reverse a linked list in pairs in java How to find middle element of linked list in java How to detect […]

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