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All examples have been configured and implemented using Java 8 update 0.20, Eclipse Luna 4.4, JMeter 2.11 and MySQL Community Server 5.6.21.Table Of Contents1. Introduction2. Technologies used3. What is this article about?4. Installation5. GUI overview6. Available requests7. Test plans and components7.1. A Subsection7.2. Samplers7.3. Logic controllers7.4. Listeners7.5. Timers7.6. Assertions7.7. ..

In this tutorial we will discuss about the inheritance in Java. The most fundamental element of Java is the class. A class represents an entity and also, defines and implements its functionality. In Java, classes can bederived from other classes, in order to create more complex relationships.A class that is derived from another class is called subclass and inherits all fields and methods of its ..

n Java, a special null value can be assigned to an object’s reference and denotes that the object is currently pointing to unknown piece of data. ANullPointerException is thrown when an application is trying to use or access an object whose reference equals to null. The following cases throw that exception:Invoking a method from a null object.Accessing or modifying a null object’s field.Taking t..

단 50줄이면 Java에서 OTP를 구현할 수 있습니다. 제가 OTP를 구현해야겠다고 생각한 계기는, '클라이언트와 서버 간 REST 통신시, 해커로부터 데이터 변조 공격을 막기 위해서 일회용 비밀번호(OTP)를 사용하면 어떨까?' 라는 생각에서 출발했습니다. (적용은 안했지만, 누군가에게 도움이 되길 바라며...) OTP (One Time Password) 고정된 패스워드 대신 무작위로 생성되는 일회용 패스워드를 이용하는 사용자 인증 방식. 은행에서 OTP 단말기나, OTP 카드를 사용해보신 분이라면 한 번쯤 생각해보셨을 겁니다. '서버랑 통신하는건가..?' 사실, OTP는 단말기와 서버가 통신하는게 아닙니다.미리 정의된 비밀키와 시간 정보를 토대로 Hash 처리하여 비밀번호를 만들어냅니다. 핵심은 시..

Table Of Contents1. Why annotations?2. Introduction3. Consumers4. Annotations syntax and annotation elements5. Where can be used6. Use cases7. Built in annotations8. Java 8 and annotations9. Custom annotations10. Retrieving Annotations11. Inheritance in annotations12. Known libraries using annotations13. Summary14. Download15. Resources In this article we are going to explain what Java annotatio..