Source: javaindos.

Let's say your file is in C:\mywork\

Run Command Prompt

C:\> cd \mywork

This makes C:\mywork the current directory.

C:\mywork> dir

This displays the directory contents. You should see filenamehere.java among the files.

C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin

This tells the system where to find JDK programs.

C:\mywork> javac filenamehere.java

This runs javac.exe, the compiler. You should see nothing but the next system prompt...

C:\mywork> dir

javac has created the filenamehere.class file. You should see filenamehere.java and filenamehere.class among the files.

C:\mywork> java filenamehere

This runs the Java interpreter. You should then see your program output.

If the system cannot find javac, check the set path command. If javac runs but you get errors, check your Java text. If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command. Java is case-sensitive!

Answer from Nicholas Kadaeux on Stack Overflow
Top answer
1 of 13
274

Source: javaindos.

Let's say your file is in C:\mywork\

Run Command Prompt

C:\> cd \mywork

This makes C:\mywork the current directory.

C:\mywork> dir

This displays the directory contents. You should see filenamehere.java among the files.

C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin

This tells the system where to find JDK programs.

C:\mywork> javac filenamehere.java

This runs javac.exe, the compiler. You should see nothing but the next system prompt...

C:\mywork> dir

javac has created the filenamehere.class file. You should see filenamehere.java and filenamehere.class among the files.

C:\mywork> java filenamehere

This runs the Java interpreter. You should then see your program output.

If the system cannot find javac, check the set path command. If javac runs but you get errors, check your Java text. If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command. Java is case-sensitive!

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121

To complete the answer :

  1. The Java File

    TheJavaFile.java
    
  2. Compile the Java File to a *.class file

    javac TheJavaFile.java
    
    • This will create a TheJavaFile.class file
  3. Execution of the Java File

    java TheJavaFile
    
  4. Creation of an executable *.jar file

    • You've got two options here -

      1. With an external manifest file :

        • Create the manifest file say - MANIFEST.mf

        • The MANIFEST file is nothing but an explicit entry of the Main Class

        • jar -cvfm TheJavaFile.jar MANIFEST.mf TheJavaFile.class

      2. Executable by Entry Point:

        • jar -cvfe TheJavaFile.jar <MainClass> TheJavaFile.class
  5. To run the Jar File

    java -jar TheJavaFile.jar
    
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Medium
medium.com › @AlexanderObregon › executing-java-code-from-the-command-line-d6a3c09bb565
Executing Java Code from the Command Line | Medium
March 9, 2025 - Learn how to compile and run Java programs from the command line using javac and java, manage classpaths, and understand how the JVM processes bytecode.
Discussions

How to run java program on Command Prompt/Terminal with Intellij (WINDOWS)?
For my java courses all of our programs had to be run from command prompt so I understand your need. A lot of prof's want you to be comfortable with the command line. First, you have to navigate to the folder where the java file is located. You can do this using the "cd" command to move around to where you keep your files. Then you compile the program from the java file with the main method. Make sure any class files you need are in same folder. compile: javac MainMethodFile.java If no exceptions, then you launch: java MainMethodFile Make sure to just use the file name not the whole file extension when you launch. Don't use the .java or .class extension. More on reddit.com
🌐 r/javahelp
3
1
June 6, 2020
Running Java in Command Prompt?
Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://imgur.com/a/fgoFFis ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
🌐 r/javahelp
11
1
February 2, 2021
how do i run java from the command line?
type - "java HelloWorld", to execute your file. More on reddit.com
🌐 r/learnjava
10
5
October 1, 2018
Running A Java File Using Command Prompt

Double check the exact name and extension of your file on your desktop. Double check these steps:

  1. cd to desktop.

  2. touch helloWorld.java

  3. nano helloWorld.java

  4. enter code, control X to exit, Y to save. Enter.

  5. javac helloWorld.java

  6. java MyHelloWorldDemo (or whatever your class is named)

More on reddit.com
🌐 r/learnjava
8
8
September 13, 2019
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W3Schools
w3schools.com › java › java_getstarted.asp
Java Getting Started
Open Command Prompt (cmd.exe), navigate to the directory where you saved your file, and type "javac Main.java": ... This will compile your code. If there are no errors in the code, the command prompt will take you to the next line.
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Princeton CS
introcs.cs.princeton.edu › java › windows › manual.php
Hello World in Java on Windows (manual instructions)
This document instructs you on how to manually setup a Java programming environment for your Windows computer and provides a step-by-step guide for creating, compiling, and executing a Java program using either DrJava or the Command Prompt.
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CodingNomads
codingnomads.com › how-to-run-java-from-command-line
Executing Java applications from the CLI
Note: you do not need to add the .class extension because the java command only works on files with the .class extension. You should see Hello World! printed out in the CLI window.
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Princeton CS
introcs.cs.princeton.edu › java › 15inout › windows-cmd.html
Java and the Windows Command Prompt
First, be sure that HelloWorld.class is now in the current directory. Be sure to type java HelloWorld without a trailing .class or .java. Check that the command "java -version" works. Now try to execute with "java -cp . HelloWorld". If this works, you need to edit your classpath.
Find elsewhere
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Reddit
reddit.com › r/javahelp › running java in command prompt?
r/javahelp on Reddit: Running Java in Command Prompt?
February 2, 2021 -

Second Edit: May have fixed the Environment Variables to work with JAVA_HOME. Minor change to what was printed but was able to run the file like so:

C:\Users\Test>cd Documents\MyFirstProgramFolder

C:\Users\Test\Documents\MyFirstProgramFolder>java MyFirstProgram
We did it! Again! Number 3!

Again, making sure I was in the right directory was the first issue, but now I may have the Environment Variables fixed. I hope at least. Thank you again everyone.

Edit: Have my issue mostly solved. I am able to compile and run the code. cd-ing to the correct directory seemed to be the issue in the command prompt and that is all I really need for now. Thank you to everyone who took the time try to help me!

Hello! I am new to learning Java but have been stuck on a single issue for the past day and a half. I have recently started reading Head First Java to try and teach myself Java. I took a single programming class that was taught in Java 3-4 years ago. All of the programming experience I have has always been in some sort of IDE. In Head First Java they want you to work through the command line after writing code. I have been entirely unsuccessful at setting up Java to work through the command prompt. I have now tried to download 2-3 different JDK's, followed 2-3 tutorials on how to just get "Hello World" to print, and followed a guide on how to set up the Java Environment. None have been successful and I am frequently met with the below errors/issues when I try to parse together my understanding trying to fix the issue. I would really like to learn how to actually do things without the need of an IDE. Any help at all would be greatly appreciated! So the question summed up, is more or less where am I going wrong for setting up the Java environment, or JVM?

In the Command Prompt:

C:\Users\Test>"C:\Program Files\Java\jdk1.8.0_161\bin"\Javac MyFirstProgram.java

javac: file not found: MyFirstProgram.java

Usage: javac <options> <source files>

use -help for a list of possible options

In Windows Powershell:

PS C:\Users\Test\Documents\MyFirstProgramFolder> "C:\Program Files\Java\jdk1.8.0_161\bin"\javac MyFirstProgram.java

At line:1 char:41

+ "C:\Program Files\Java\jdk1.8.0_161\bin"\javac MyFirstProgram.java

+ ~~~~~~

Unexpected token '\javac' in expression or statement.

+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException

+ FullyQualifiedErrorId : UnexpectedToken

Below are some of the websites I have tried:

https://www.instructables.com/How-to-Make-Your-First-Computer-Program/ - This instructables link is what I just used to receive the above responses.

https://www.tutorialspoint.com/java/java_environment_setup.htm

https://www.geeksforgeeks.org/setting-environment-java/

The Code:

class MyFirstProgram {

    public static void main(String[] args) {
            System.out.println("Hello, World");
    }
}
Top answer
1 of 6
2
move the quote to the end of the args[0] "C:\Program Files\Java\jdk1.8.0_161\bin\javac.exe" MyFirstProgram.java Java is a compiled language and not interpreted, so there is no actual IDE - but maybe a Java-pro knows one. There are some websites, where you can play around with classes...
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First, I would add C:\Program Files\Java\jdk1.8.0_161\bin to your system PATH environment variable - this will allow you to use the Java commands without including the entire path: Right click Computer Click the properties On the left pane select Advanced System Settings Select Environment Variables Under the System Variables, Select PATH and click edit,and then click new and add path as C:\ProgramFiles\Java\jdk1.8.0_161\bin (depending on your installation path)and finally click ok (credit to https://stackoverflow.com/questions/32241179/setting-up-enviromental-variables-in-windows-10-to-use-java-and-javac for putting in the steps so I didn't have to) Once done, you should be able to use javac MyFirstProgram.java instead of putting the entire path in for javac and mucking about with quotes :) Note: you will need to restart the command prompt for the path update to take effect :) Second, in your examples above your error is file not found for the command prompt, and your folder is different than the one showing for powershell ( C:\Users\Test for command prompt and C:\Users\Test\Documents\MyFirstProgramFolder for powershell) so I'm guessing the error was due to MyFirstProgram.java not being in the folder the command prompt was in. So if you are in C:\Users\Test\Documents\MyFirstProgramFolder (assuming this is the location of your java file) and did the Path fix above, you can just use javac MyFirstProgram.java or "C:\Program Files\Java\jdk1.8.0_161\bin\javac.exe" MyFirstProgram.java if you didn't modify the path. Edit to add: both of those commands should work in powershell as well depending on whether you set the PATH variable or not assuming you are in the folder containing MyFirstProgram.java.
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Make Tech Easier
maketecheasier.com › home › computing › windows › how to run a java program from the command prompt
How to Run a Java Program from the Command Prompt - Make Tech Easier
July 16, 2025 - Now, go back to the Command Prompt and compile the Java program using javac followed by using the java command. It will display the summation value. After you start working with Java in Windows Command Prompt, here are a few other very simple Java commands that you can figure out easily as a newbie. javac *.java: compile all the java files saved in a folder · javac Timenow.java: display local time on your cmd
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Wikihow
wikihow.com › computers and electronics › software › programming › java › how to compile and run a java program using command prompt
How to Compile and Run a Java Program Using Command Prompt
September 28, 2025 - 1. Type ″cmd″ into Windows search. 2. Right-click Command prompt. 3. Click Run as administrator. 4. Type ″cd \path\to\java\program″. 5. Press Enter. 6. Type ″javac -filename.java″. 7. Press Enter. 8. Type ″java filename.java″. 9.
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GeeksforGeeks
geeksforgeeks.org › java › how-to-run-java-program
How to Run Java Program? - GeeksforGeeks
July 23, 2025 - Step 6: Run your Java program by typing "java [filename]" in the command prompt/terminal. The program will execute and produce the output.
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KaaShiv InfoTech
kaashivinfotech.com › home › how to run a java program in cmd: step-by-step guide for beginners
How to Run a Java Program in CMD – Easy Step-by-Step
August 9, 2025 - So go ahead and open your CMD or Terminal, and get to coding! ... A: Go to the src folder and enter javac -d . package/FileName.java then java package.FileName. ... A: No, you need the JDK to compile and run Java programs.
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iO Flood
ioflood.com › blog › java-run-programs-command-line
How-To Run Java Programs From Command Line
February 29, 2024 - In this example, we’ve used the java command followed by the name of the class simpleAddition. This class contains the main method, which is the entry point for any Java program. When you run this command, it will execute the simpleAddition program and print the sum of all passed integers to the console.
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freeCodeCamp
freecodecamp.org › news › how-to-execute-and-run-java-code
How to Execute and Run Java Code from the Terminal
March 10, 2022 - The same process is applicable for all of the operating systems out there. ... We run the .class file to execute the Java programs. For that, we use the command java class_file_name_without_the_extension.
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JanbaskTraining
janbasktraining.com › home › what is the process to run a java program in cmd?
What Is The Process To Run A Java Program In CMD?
July 5, 2019 - For the reasons for figuring out how to assemble and run a program, however, you can utilize any kind of Java program. Open Command Prompt/Terminal. Getting to the order line varies somewhat for Mac and Windows. Windows:Press ⇱ Home, at that point, type cmd.
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Software Testing Material
softwaretestingmaterial.com › home › selenium › how to run a java program using command prompt
How To Run A Java Program Using Command Prompt
June 11, 2025 - Run a Java Program using Command Prompt - We use Java compiler javac to compile and the Java interpreter java to run the Java program
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Codecademy
codecademy.com › article › java-for-programmers-java-and-the-command-line
Java and the Command Line | Codecademy
Once you have your executable file, use java and the name of the class to run it: ... Note: Do not include the .java or .class suffixes, only use the name of the class. ... Hello world! ... Each Java program must have a main method, and every main method contains the parameters String[] args, but what does that mean?
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Quora
quora.com › How-do-I-run-a-Java-program-in-CMD
How to run a Java program in CMD - Quora
Answer (1 of 2): Open the command prompt and type ‘javaThe java command usage should be displayed. Check Working of javac Open the command prompt and type ‘javac’ The javac command usage should be displayed. If while executing java or javac, we get the command 'javac' is not recognized ...
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GeeksforGeeks
geeksforgeeks.org › java › java-program-open-command-prompt-insert-commands
Java Program to Open the Command Prompt and Insert Commands - GeeksforGeeks
April 22, 2025 - To execute the commands inside the command prompt we can use Runtime.exec() method. We can perform various commands such as dir, which is used to list all directories and the ping, which is used to test the ability of the source computer to ...
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Codemia
codemia.io › home › knowledge hub › how do i run a java program from the command line on windows?
How do I run a Java program from the command line on Windows? | Codemia
January 27, 2025 - Open the command prompt, navigate to the directory where your Java file is located, and compile the Java program using the javac command: ... The javac compiler will create a HelloWorld.class file in the same directory, which contains the bytecode that the Java Virtual Machine (JVM) understands and can execute.