With the increasing number of mobile users, android development is quite a topic to discuss.

Java is one of the popular programming languages compared to other programming languages.

Java is a versatile programming language. It can be used for website development, application development, machine learning, etc.

The goal of intending programmers to write once and run anywhere makes Java better. And due to this fact, Java has been surviving this date since 1995.

There are lots of programming languages for android development like C++, C#, Dart, Kotlin, etc. However, for android development, Java is still considered to be the best. 

One of the good approaches for software development is the object-oriented approach. Java is object-oriented.

Besides all these, Java is constantly emerging. There are huge communities of java programmers that help in creating, improving, and plus many libraries for applications.

Java has an extensive set of libraries. It is easy to take advantage of these libraries.

Developers who don’t use it have to deal with various problems like memory leads and bad pointer usage. Sometimes this kind of problem will harm the highest level of damage in applications. 

And Android easily fixes those problems with the help of Java. Thus, it is obvious for android developers to choose Java over other programming languages.

All the SDKs required to build for android applications use the standard libraries of Java. Due to this reason, Java has the upper hand over the rest.

The majority of Android apps today that we have been using are mostly in Java. This shows how much better Java is in android development.

Meanwhile, Java code is always object-oriented. Moreover, Android primarily relies on the java programming language.

What are the best websites to learn Java from?

The best websites to learn java are as follows:

• Codecademy

Codeacademy is most likely the best place to learn Java online. It helps to provide free courses of Java online for beginner and experienced levels.

It helps to build different projects based on the level of programmers.

• Udemy

It is one of the biggest platforms to learn online courses. Udemy provides a tremendous number of Java courses for different levels. 

You can learn Java for free but to learn Java in-depth this platform may charge you up to $11.

• Telusko

Telusko is a Youtube channel where there are lots of videos on Java tutorials. In this channel, everything is explained in a pretty good manner.

There are Java tutorial videos from beginner level to experienced level of programmers.

• Derek Banas

Derek Banas is also a Youtube channel. There are lots of videos on Java tutorials.

There we can also find tutorials to build projects on java.

• Coursera

Coursera is also a great platform to learn Java Online. One of the most advantageous things that you can get from this platform is a certificate.

It also helps to build or work on different projects related to Java.

• GeeksforGeeks

GeeksforGeeks helps you to give all the resources that you need to learn Java. Everything is in a systematic way and also helps you to push further in-depth while learning. 

• SoloLearn 

SoloLearn has a detailed guide for those who want to learn Java and enhance their programming skills. The tutorial has 6 modules and 65 chapters. 

It has also a mobile-based application that supports both ios and android development operating systems.

Best books for Java?

There are lots of books for Java but here are the top 10 recommendations for you:

• Head First Java

• Core Java Volume I – Fundamentals

• Effective Java

• Java: A Beginner’s Guide

• Java – The Complete Reference

• Java Concurrency in Practise

• Test-Driven: TDD and Acceptance TDD for Java Developers

• Head First Object-Oriented Analysis Design

• Java Performance: The Definite Guide

• Head First Design Patterns

Is Kotlin replacing Java?

No, Java will not be replaced by Kotlin. Because android development SDK’s use the java libraries and the community of Java developers is pretty much huge till now. 

Though Kotlin is supported by Google, Java will continue to evolve.

How many days will it take to learn Java?

The time period to learn Java is 3 to 4 months if you are a beginner. And to be an expert on Java, it might take more than 6 months or a year. 

It depends on how much you can take and embrace it. But consistency will help to make you be expert in a short period of time

Why is Java still popular?

Java is still popular because the number of reasons mentioned below:

• Java is an object-oriented programming language.
• There are huge Java developer communities active.
• Java is safe, portable, maintainable, and comes with high-level concurrency tools.
•  It can be used for website development, application development, machine learning, etc.
• It has been evolving since 1995.