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Java Courses Training & Certification Institute

What Is Course About

Java is a programming language and computing platform. It is used to develop, and deploy virtually all types of embedded and mobile applications, games, Web-based content, and enterprise software. Some of the key advantages of using Java are, it enables programmes to: Write software on one platform and run it on virtually any other platform; create programs that can run within a web browser and access available web services; develop server-side applications for online forums, stores, polls, HTML forms processing, etc; and write powerful and efficient applications for mobile phones, remote processors, microcontrollers, wireless modules, sensors, gateways, consumer products, and practically any other electronic device.

Course Objective

1-Understand fundamentals of programming such as variables, conditional and iterative execution, methods, etc.
2-Understand fundamentals of object-oriented programming in Java, including defining classes, invoking methods, using class libraries, etc.
3-Be able to use the Java SDK environment to create, debug and run simple Java programs.

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Who Can Enroll

No prior Java programming experience is necessary; however, before taking this course, you should have a basic understanding of the programming concepts (variables, functions, conditionals, and for loops) that you can learn in the first course of this specialization, “Programming Foundations with JavaScript, HTML and CSS,” or in another introductory programming course.

Any Query

Basic Questions of Java

What are the important features of java 8 release?
Following list is a highlight of important features, there are other minor enhancements, security features, bug fixes are available as part of Java 8.
1- Lambda Expressions.
2- Pipelines and Streams.
3- Date and Time API.
4- Default Methods.
5- Type Annotations.
6- Nashorn JavaScript Engine.
7- Concurrent Accumulators.
8- Parallel operations.

What do you mean by platform independence of Java.
Platform independence means that you can run the same Java Program in any Operating System. For example, you can write java program in Windows and run it in Mac OS.

What is JVM and it platform in independent.
Java Virtual Machine (JVM) is the heart of java programming language. JVM is responsible for converting byte code into machine readable code. JVM is not platform independent, thats why you have different JVM for different operating systems. We can customize JVM with Java Options, such as allocating minimum and maximum memory to JVM. It’s called virtual because it provides an interface that doesn’t depend on the underlying OS.

What is the importance of main method in Java?
main() method is the entry point of any standalone java application. The syntax of main method is public static void main(String args[]). main method is public and static so that java can access it without initializing the class. The input parameter is an array of String through which we can pass runtime arguments to the java program.

Can we overload main method?
Yes, we can have multiple methods with name “main” in a single class. However if we run the class, java runtime environment will look for main method with syntax as public static void main.

What is Java package and Which package is imported by default?
Java package is the mechanism to organize the java classes by grouping them. The grouping logic can be based on functionality or modules based. A java class fully classified name contains package and class name. For example, java.lang.Object is the fully classified name of Object class that is part of java.lang package. java.lang package is imported by default and we don’t need to import any class from this package explicitly.

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