Linux run java console

A Step-by-Step Guide on Running Java Programs in the Terminal on Linux

Learn how to run Java programs in the terminal on Ubuntu and other Linux distributions. Follow our step-by-step guide to install and verify JDK, compile and execute Java programs, run command-line Java programs, and enable and view Java Console on Linux or Solaris.

• Installing and Verifying JDK Version in Linux
• Compiling and Executing Java Programs in Terminal
• How to Run Java Program in Terminal Ubuntu Linux
• Running Command-Line Java Programs on Linux
• Enabling and Viewing Java Console on Linux or Solaris
• Other helpful code examples for running Java programs in the terminal on Linux
• Conclusion
• How to run java in terminal Linux?
• How to run java on terminal?
• How to run a java program in Linux?
• How to run java in terminal Ubuntu?

Java is a popular programming language that is widely used for web development, mobile development, and app development. One of the main advantages of Java is its cross-platform compatibility, which means that Java programs can be executed on different operating systems, including Windows, Mac, and Linux. In this guide, we will provide a step-by-step guide on how to run Java programs in the terminal on Ubuntu and other Linux distributions. We will cover the installation and verification of the Java Development Kit (JDK), the compilation and execution of Java programs in the terminal, running command-line Java programs on Linux, and enabling and viewing the Java Console on Linux or Solaris.

Installing and Verifying JDK Version in Linux

Before running java programs on ubuntu or any other Linux distribution, you need to install the Java Development Kit (JDK). The JDK is a software development environment that provides tools to develop, debug, and run Java programs. The following steps show you how to install and verify the JDK version in Linux:

1. Open the terminal on Ubuntu or any other Linux distribution.
2. Type the following command to install the JDK:

sudo apt-get install openjdk-8-jdk 

Compiling and Executing Java Programs in Terminal

After installing the JDK, you can start writing Java programs and running them on Ubuntu or any other Linux distribution. Here are the steps to compile and execute Java programs in the terminal:

1. Open the terminal on Ubuntu or any other Linux distribution.
2. Create a new file with the “.java” extension and write your Java program.

How to Run Java Program in Terminal Ubuntu Linux

In this video I am going to show you How to install Java JDK 10 on Ubuntu Linux ( with Duration: 11:41

Running Command-Line Java Programs on Linux

In addition to running java programs in the terminal on Ubuntu or any other Linux distribution, you can also run command-line Java programs. Here is how to do it:

1. Open the terminal on Ubuntu or any other Linux distribution.
2. Write your Java program and save it with the “.java” extension.

import java.io.*;public class CommandLine < public static void main(String[] args) < try < Process p = Runtime.getRuntime().exec("ls -l"); BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = null; while ((line = in.readLine()) != null) < System.out.println(line); >> catch (IOException e) < e.printStackTrace(); >> > 

Enabling and Viewing Java Console on Linux or Solaris

The Java Console is a debugging tool that allows you to view and debug Java applets and applications. Here are the steps to enable and view the Java Console on Linux or Solaris:

1. Open the terminal on Ubuntu or any other Linux distribution.
2. Navigate to the Java installation directory.

cd /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/ 

Other helpful code examples for running Java programs in the terminal on Linux

In Java case in point, java compiler linux terminal code example

sudo apt install default-jdk

In Java case in point, java run linux command code sample

Process p = Runtime.getRuntime().exec("ls -la /home"); BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getOutputStream())); String result; while ((result = stdInput.readLine()) != null)

In Java , for instance, run java from terminal

//Run this line to compile javac programName.java//Run this line to run java programName

In Java , for instance, run java from terminal linux

//To compile, type javac filename.java//To run the generated class file, use java filename

In Java , for example, how to run a java file in terminal code sample

javac FirstJavaProgram.java

Conclusion

In this guide, we have provided a step-by-step guide on how to run Java programs in the terminal on Ubuntu and other Linux distributions. We covered the installation and verification of the Java Development Kit (JDK), the compilation and execution of Java programs in the terminal, running command-line Java programs on Linux, and enabling and viewing the Java Console on Linux or Solaris. By following these steps, you can easily run Java programs on Ubuntu or any other Linux distribution, and take advantage of the cross-platform compatibility of the Java language.

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How to Run Java from Command-line in Linux

Java is the world’s popular software development platform that James Gosling develops. It is designed to support multiple platforms like Linux, macOS and Windows. Mobile and Desktop applications can also be developed using Java language.

Java language is one of the most popular high-level object-oriented programming languages. It comes with a simple syntax and easily understandable for beginners, as it is very secure and economical to use. Java is the platform-independent software, and it also provides an auto garbage collection facility.

How to Run Java through Command-line

To run the java program in Linux, we need to verify if Java Development Kit (JDK) is available in the system and its version.

To confirm it, type the following command:

(Javac command-line tool is used for the compilation of java programs)

The Javac command tool is not available in my system. We have multiple commands to download it, as mentioned in the above image.

Let’s go with the default-jdk command to get it:

To verify the installation of javac, type:

Now, write a Java program in the text file and save it with .java extension.

Suppose I created a file named “testing.java” and write a simple program in it:

(Keep in mind that your class name should be the same as the file name)

Compile the testing.java file on the terminal using the javac command:

Now, execute the Java program by calling its class name in the terminal:

Conclusion

Java is the high-level language of the modern era supported by the Java Development Kit (JDK). JDK is a package that helps to run java and is used for the development of software packages.

Java language comes with a simple syntax that is easy to get for beginners, and it is one of the most usable object-oriented programming languages.

We have seen in this article that how to install and run Java applications on the terminal.

About the author

Syeda Wardah Batool

I am a Software Engineer Graduate and Self Motivated Linux writer. I also love to read latest Linux books. Moreover, in my free time, i love to read books on Personal development.

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How to Run a Command-Line Java Program on Linux?

In this tutorial, we will learn about how to run a command-line Java program from the Linux terminal.

Prerequisites

To run Java programs from the command line, a functional Java Runtime Environment is required.

To install Java Runtime Environment on Ubuntu/Debian based systems:

sudo apt install default-jdk

and to install Java Runtime Environment on CentOS/RHEL based systems:

sudo yum install java-1.8.0-openjdk

To check if a functional Java Runtime Environment is available on your system execute:

The output similar to shown above tells us about a functional Java Runtime Environment available on the system.

Running a Command-Line Java Program in Linux

Follow the steps listed below to get the bytecode from the source file, and to run the Java program.

Step 1: Write the Java program

You can use any text editor (like nano, vim, etc.) to write a Java program and then save it as a .java file. In this tutorial, we have written a “Hello World” Java program with the following source code, saved as a HelloWorld.java file.

Note: The Java source code file name (ending with extension .java) should be the same as the public class name (in here HelloWorld) of the Java program source code. That is why we have named our source code file HelloWorld.java

Once we have written and saved our Java program in a .java file, we can now proceed further.

Step 2: Compile your Java program

A Java compiler compiles the source code of a Java program to obtain a bytecode for the particular source code. To compile a Java program source code, the javac command is used.

If no error is printed on the screen, then the Java program has been successfully compiled and a new file is obtained (in here the HelloWorld.class is obtained), which is the bytecode file for our Java program.

Step 3: Run the command-line Java program

Now to run the Java program that we have compiled earlier in the second step.

We use the java command to run the Java program. To run the Java program, execute:

Notice that we haven’t used any file extension while running a Java program using the java command. This is because the Java command can identify the compiled Java files and does not need the .java extension to be added.

Conclusion

You can easily write, compile, and run a Java program from the command line following the steps mentioned above. To run a Java program, the Java Runtime Environment is required which can be installed using your Linux distribution’s official package manager.

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