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Java Programming Exercises, Practice, Solution

Java Exercises

Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering embedded and mobile applications, games, Web-based content, and enterprise software. With more than 9 million developers worldwide, Java enables you to efficiently develop, deploy and use exciting applications and services.

The best way we learn anything is by practice and exercise questions. Here you have the opportunity to practice the Java programming language concepts by solving the exercises starting from basic to more complex exercises. A sample solution is provided for each exercise. It is recommended to do these exercises by yourself first before checking the solution.

Hope, these exercises help you to improve your Java programming coding skills. Currently, following sections are available, we are working hard to add more exercises .... Happy Coding!

List of Java Exercises:

Note: If you are not habituated with Java programming you can learn from the following :

More to Come !

Popularity of Programming Language
Worldwide, Jul 2021 compared to a year ago:

`
Rank Change Language Share Trend
1 Python 30.32 % -1.8 %
2 Java 17.79 % +1.0 %
3 Javascript 9.03 % +1.1 %
4 C# 6.55 % -0.2%
5 up arrow C/C++ 6.02 % +0.3 %
6 down arrow PHP 5.94 % +0.0 %
7 R 3.96 % -0.0 %
8 up arrow TypeScript 2.26 % +0.3 %
9 down arrow Objective-C 2.24 % -0.3 %
10 down arrow Swift 1.78 % -0.4 %
11 up arrow Kotlin1.75 % +0.3 %
12 down arrow Matlab 1.72 % -0.2 %
13 up arrow VBA 1.38 % +0.1 %
14 down arrow Go 1.28 % -0.1 %
15 up arrow Rust 1.26 % +0.3 %
16 down arrow Ruby 1.01 % -0.2 %
17 up arrow Visual Basic 0.76 % -0.1 %
18 down arrow Ada 0.74 % +0.3 %
19 down arrow Scala 0.72 % -0.3 %
20 down arrow Dart 0.61 % +0.1 %
21 up arrow Lua 0.54 % +0.1 %
22 down arrow Abap 0.44 % -0.0 %
23 up arrow Perl 0.38 % -0.0 %
24 up arrow Julia 0.36 % -0.0 %
25 down arrow Groovy 0.34 % -0.1 %
26 down arrow Cobol 0.3 % -0.1 %
27 Delphi/Pascal 0.27 % -0.0 %
28 Haskell 0.24 % -0.0 %

Source : https://pypl.github.io/PYPL.html

TIOBE Index for July 2021

Jul 2021 Jul 2020 Change Programming Language Ratings Change
1 1 C 11.62% -4.83%
2 2 up arrow Java 11.17% -3.93%
3 3 down arrow Python 10.95% +1.86%
4 4 C++ 8.01% +1.80%
5 5 C# 4.83% -0.42%
6 6 Visual Basic 4.50% -0.73%
7 7 JavaScript 2.71% +0.23%
8 9 up arrow PHP 2.58% +0.68%
9 13 up arrow Assembly language 2.40% +1.46%
10 11 up arrow SQL 1.53% +0.13%
11 20 up arrow Classic Visual Basic 1.39% +0.73%
12 8 down arrow R 1.32% -1.08%
13 12 down arrow Go 1.17% -0.04%
14 50 up arrow Fortan 1.12% +0.90%
15 24 up arrow Groovy 1.09% +0.51%
16 10 down arrow Swift 1.07% -0.37%
17 16 down arrow Ruby 0.95% +0.14%
18 14 down arrow Perl 0.90% +0.03%
19 15 down arrow MATLAB 0.88% +0.05%
20 30 up arrow Delphi/Object Pascal 0.85% +0.36%

Source : https://www.tiobe.com/tiobe-index/

List of Exercises with Solutions :

[ Want to contribute to Java exercises? Send your code (attached with a .zip file) to us at w3resource[at]yahoo[dot]com. Please avoid copyrighted materials.]



Java: Tips of the Day

How to print a float with 2 decimal places in Java?

You can use the printf method, like so:

System.out.printf("%.2f", val);

In short, the %.2f syntax tells Java to return your variable (val) with 2 decimal places (.2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).

There are other conversion characters you can use besides f:

  • d: decimal integer
  • o: octal integer
  • e: floating-point in scientific notation

Ref: https://bit.ly/3hhiBW9