Core Java

Java for loop

Java for loop and enhanced for loop is a type of control flow statement which provides a compact way to iterate over a range of values. for loop repeatedly loops through the code until a particular condition is satisfied.  Over the period, Java has added different types of for loop. for loop Enhanced for loop …

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Switch case statement in Java

A switch statement is a conditional statement that tests against multiple cases and displays one or multiple outputs based on the matching circumstances. Unlike if-then and if-then-else statements, the switch statement can work with byte, short, char, and int primitive data types. It also works with enum types (discussed in Java Enum), the String class, and a few wrapper classes: Character, Byte, Short, and Integer. Important Rules Only constants or literals are allowed in case Duplicate …

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Data types in Java

Java is a statically-typed language, which means that all variables must first be declared before they can be used. It means the variable’s name and types must be defined before it can be used in code. boolean bool = true; By writing the above line we are telling the program that a variable named bool …

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Java 8 Functional Interfaces

Introduction to functional interfaces A functional interface is an interface that has a single abstract method.  Functional interfaces can have multiple static and default methods, but they should have only one abstract method to qualify as a functional interface. Functional interfaces were introduced in Java 8 in order to implement lambda expressions.

History of java

Java is a general, all-purpose computer programming language that is circumstantial, class-based, object-oriented, and specially designed to have few application dependencies as possible. Java was developed initially for interactive television, but it was too advanced technology for the digital cable television industry at the time. It is proposed to let application developers “write once, run …

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