• 27 October

    How to fix illegal start of expression error in java

    In this post, we will see how to fix "illegal start of expression" in java. You will get this error while using javac command in command prompt. In eclipse or any other ide, it will give you more helpful compile time error. There can be multiple reasons for getting this error. Using private, public or […]

  • 27 October

    Count number of words in a string

    In this post, we will see how to find number of words in a String. Problem Find the number of words in a String. For example: There are 6 words in below String welcome to java tutorial on Java2blog Algorithm The algorithm will be very simple. Initialize count with 1 as if there are no […]

  • Java 8 Function
    24 October

    Java 8 – java.util.function.Function example

    In this post, we will see about java.util.function.Function functional interface. java.util.function.Function is part of java.util.function package. There are some inbuilt functional interfaces in java.util.function which you can use if functional interface matches with your requirement. java.util.function.Function is a functional interface which takes input single argument T and returns result R. It has an abstract method as below. […]

  • 23 October

    AWS Certified SysOps Administrator – Associate Examination

    The is intended for associates, who exhibit an administrative role in an application environment. The Certification examination tests the ability of the individual to perform deployment, management and operations on the AWS Cloud Platform Examination Overview Duration: 80 minutes of Questions: 60 Pass Score: 65% Question Type: Multiple Choice Questions Answers Type: Single/Multiple Options Correct […]

  • Java 8 Stream.of example
    17 October

    Java 8 Stream of example

    In this post, we will see about Java 8 Stream‘s of method example. stream‘s of method is static method and used to create stream of given type. For example: [crayon-6606b916b0a74648368510/] There are two overloaded version of Stream’s of method. 1) static <T> Stream<T> of(T… values) Returns a sequential ordered stream whose elements are the specified values. […]

  • Java Stream collect to array
    17 October

    Java Stream collect to array

    In this post, we will see how to collect any Java 8 Stream to array. There are many ways to do it but I am going to show easiest way. You can simply use toArray(IntFunction<A[]> generator).This generator function takes size as input and creates new array of that size. Convert Steam to Array Let’s understand […]

  • Difference between map and flatmap in java
    16 October

    Difference between map and flatMap in java

    In this post, we will see the difference between map and flatMap in java.I have already covered Stream’s map and flatMap methods  in previous articles. As you might know, Stream’s map and flatMap method both can be applied on Stream<T> and return Stream<R> as output. The actual difference is, map operation produces one output value […]

  • Java 8 Stream flatmap
    15 October

    Java 8 Stream flatMap

    In this post, we will see about Java 8 Stream flatMap function.Before understanding flatMap, you should go through stream’s map function Stream‘s flatMap method takes single element from input stream and produces any number of output values and flattens result to output stream.When you apply flatMap function on each of element of the stream, it results in […]

  • Java 8 Stream map
    15 October

    Java 8 Stream Map

    In this post, we will see about Java 8 Stream map function. stream‘s map method takes single element from input stream and produces single element to output stream. Type of Single input Stream and Output stream can differ. Java 8 Stream Map function [crayon-6606b916b22c9989908350/] Map function returns a stream consisting of the results of applying […]