Core java

Java has upgraded its Javadoc for better user interaction and user-experience. It includes a simplified search, HTML generator, Doclet API, etc. [toc] What is Javadoc The Javadoc is a tool like javac and a part of JDK. It is used to generate HTML documentation of Java source code. If you ever visit to oracle site […]

In this post, we will see about @SafeVarargs Annotation in Java 9. [toc] The @SafeVarargs is an annotation that is used to perform safe operations. When a method takes variable arguments, then it may cause to unsafe operation, so the @SafeVarargs annotation tells to the compiler to perform safe operations. For example, if we don’t […]

Type inference is a feature of Java that was introduced in Java 7. Now, Java compiler can infer type of a data automatically. For example, if we create an ArrayList then we use the code like: List list = new ArrayList(); // Before Java 7 List list = new ArrayList(); // From Java 7 and […]

In this article, we will understand the Java concurrent queue, BlockingQueue. We will then go deep into it’s one of the implementation, ArrayBlockingQueue. [toc] What is BlockingQueue BlockingQueue interface was introduced in Java 5 under concurrent APIs and it represents a thread-safe queue in which elements can be added to and removed from. We can […]

In this topic, we will discuss the private and private static methods inside an interface. [toc] interface in Java is a concept which is used to achieve abstraction. In early versions of Java, an interface can contain only abstract methods and constants until Java 8 which allows to add default and static methods as well. […]

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In this topic, we will learn to get the second last digit of a number with the help of examples. There can be several ways to get second last digit; here we are discussing some solutions. [toc] Using modulo operator Here, we are using modulo and divide operators to find the second last digit. The […]

In this post, we will see about Underscore keyword, which is introduced in java 9. [toc] Underscore In Java Underscore(_) is a symbol that is used to combine multi-words in a single identifier sometimes refers to a variable in a programming context. In Java, to create a lengthy variable, we prefer to use underscore (_) […]

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