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How to Run Java Files (.jar)

January 25, 2024 by admin Category: How To

You are viewing the article How to Run Java Files (.jar)  at Tnhelearning.edu.vn you can quickly access the necessary information in the table of contents of the article below.

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This article was co-written by Chiara Corsaro. Chiara Corsaro is a General Manager and Apple Certified Mac & iOS Technician working for macVpks, an Apple Authorized Service Provider in the San Francisco Bay Area. macVpks was founded in 1990, is A+ certified by the Business Improvement Board (BBB), and is a member of the Apple Consultants Network (ACN).

This article has been viewed 19,902 times.

This wikiHow teaches you how to open and run a workable JAR file on your Windows or Mac computer. A JAR (Java Archive) file contains data that can be used with a Java program. Most JAR files are simply a means of containing data that other programs need to run Java; so you can’t run these files and nothing happens when you double click them. Similarly, most possible JAR files are downloaded as an installation file for the purpose of installing applications or programs. Therefore, if you have problems opening the file, you should double check that your JAR file is compatible with the operating system.

Table of Contents

  • Steps
    • On Windows
    • On Mac
  • Advice
  • Warning

Steps

On Windows

Image titled Run a .Jar Java File Step 1

Image titled Run a .Jar Java File Step 1

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Install Java on your computer if you haven’t already. You cannot run the JAR file if Java is not installed on the computer. Go to https://www.java.com/en/download/ and click the Free Java Download button below the latest Java version, then install Java once the file has been downloaded.

  • You may have to restart your computer for Java to be fully loaded.
Image titled Run a .Jar Java File Step 2

Image titled Run a .Jar Java File Step 2

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Double-click the JAR file. If the file is viable and you have Java installed, the file will open. If not, proceed to the next step.

  • A window may pop up asking which program you want to use to open the file. Once there, click Java(TM) and then select OK .
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Image titled Run a .Jar Java File Step 3

Image titled Run a .Jar Java File Step 3

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You need to make sure the JAR file is a viable file. The JAR file that you download to set up the program is different from the “library” JAR file, which stores data that a Java program can use. Since non-viable JAR files don’t have the same look and feel as a viable JAR file, you can’t run them.

  • For example, many JAR files in the program’s data directory are not viable files.
  • If you’ve downloaded a JAR file from the internet, make sure you click on the correct Windows version and not the Mac version.
Image titled Run a .Jar Java File Step 4

Image titled Run a .Jar Java File Step 4

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Update Java. If the JAR file gives an error after you double click it, we need to update the java. To proceed, you:

  • Open Start
    Windows Start

    {“smallUrl”:”https://www.wikihow.com/images_en/0/07/Windowsstart.png”,”bigUrl”:”https://www.wikihow.com/images/thumb/0/07/ Windowsstart.png/30px-Windowsstart.png”,”smallWidth”:460,”smallHeight”:460,”bigWidth”:30,”bigHeight”:30,”licensing”:”<div class=”mw-parser-output “></div>”}

    .

  • Scroll down and click on the Java folder.
  • Click Check For Updates .
  • Click Update Now on the Update tab.
Image titled Run a .Jar Java File Step 5

Image titled Run a .Jar Java File Step 5

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Double-click the JAR file again. If the file still won’t open this time, then the file you’re trying to open is not viable, and therefore the file cannot “run” in the usual sense.

On Mac

Image titled Run a .Jar Java File Step 6

Image titled Run a .Jar Java File Step 6

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Install Java on your computer if not already installed. You cannot run the JAR file if Java is not installed on the computer. Visit the website https://www.java.com/en/download/ and click the Free Java Download button below the latest Java version, then install Java once the file has been downloaded.

  • While installing a non-Apple file on your Mac, you must click OK in the warning first, then click the Apple menu , then click System Preferences , click Security & Privacy ( Security & Privacy), unlock the menu, click Open Anyway located next to the file name, then click Open in the prompt before installing the file.
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Image titled Run a .Jar Java File Step 7

Image titled Run a .Jar Java File Step 7

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Try double clicking the JAR file. If the file is viable and you have Java installed, the file will open. If not, proceed to the next step.
Image titled Run a .Jar Java File Step 8

Image titled Run a .Jar Java File Step 8

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/e/e4/Run-a-.Jar-Java-File-Step-8.jpg/v4-728px-Run-a-. Jar-Java-File-Step-8.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/e/e4/Run-a-.Jar-Java-File-Step-8 .jpg/v4-728px-Run-a-.Jar-Java-File-Step-8.jpg”,”smallWidth”:460,”smallHeight”:347,”bigWidth”:728,”bigHeight”:549,” licensing”:”<div class=”mw-parser-output”></div>”}
You need to make sure the JAR file is a viable file. The JAR file that you download to set up the program is different from the “library” JAR file, which stores data that a Java program can use. Since non-viable JAR files don’t have the same look and feel as a viable JAR file, you can’t run them.

  • For example, multiple JAR files in a program data directory are not viable files.
  • If you downloaded the JAR file from the internet, you need to make sure you downloaded the Mac version and not the other operating system version.
Image titled Run a .Jar Java File Step 9

Image titled Run a .Jar Java File Step 9

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/9/96/Run-a-.Jar-Java-File-Step-9.jpg/v4-728px-Run-a-. Jar-Java-File-Step-9.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/9/96/Run-a-.Jar-Java-File-Step-9 .jpg/v4-728px-Run-a-.Jar-Java-File-Step-9.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,” licensing”:”<div class=”mw-parser-output”></div>”}
Update Java. If the JAR file gives an error after double clicking, we need to update the java. To proceed, you:

  • Open Apple menu
    Mac Apple

    {“smallUrl”:”https://www.wikihow.com/images_en/f/ff/Macapple1.png”,”bigUrl”:”https://www.wikihow.com/images/thumb/f/ff/ Macapple1.png/29px-Macapple1.png”,”smallWidth”:460,”smallHeight”:476,”bigWidth”:29,”bigHeight”:30,”licensing”:”<div class=”mw-parser-output” “></div>”}

    .

  • Click System Preferences .
  • Click Java .
  • Click the Update tab.
  • Click Update Now .
  • Image titled Run a .Jar Java File Step 10

    Image titled Run a .Jar Java File Step 10

    {“smallUrl”:”https://www.wikihow.com/images_en/thumb/6/68/Run-a-.Jar-Java-File-Step-10.jpg/v4-728px-Run-a-. Jar-Java-File-Step-10.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/6/68/Run-a-.Jar-Java-File-Step-10 .jpg/v4-728px-Run-a-.Jar-Java-File-Step-10.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,” licensing”:”<div class=”mw-parser-output”></div>”}
    Double-click the JAR file again. If the file still won’t open this time, then the file you’re trying to open is not viable, and therefore the file cannot “run” in the usual sense.
  • Advice

    • Java programs work on any platform. If there’s a program that doesn’t work, it’s either not coded properly, or it’s a very intensive program (system resources or other programs).
    • A .jar file can be a program or a library. If it is a library, then there is no executable class inside the file, so it cannot run.
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    Warning

    • Java is more secure than most programming languages, but malware written in Java still exists. You should be cautious when running JAR files downloaded from the internet.
    X

    This article was co-written by Chiara Corsaro. Chiara Corsaro is a General Manager and Apple Certified Mac & iOS Technician working for macVpks, an Apple Authorized Service Provider in the San Francisco Bay Area. macVpks was founded in 1990, is A+ certified by the Business Improvement Board (BBB), and is a member of the Apple Consultants Network (ACN).

    This article has been viewed 19,902 times.

    This wikiHow teaches you how to open and run a workable JAR file on your Windows or Mac computer. A JAR (Java Archive) file contains data that can be used with a Java program. Most JAR files are simply a means of containing data that other programs need to run Java; so you can’t run these files and nothing happens when you double click them. Similarly, most possible JAR files are downloaded as an installation file for the purpose of installing applications or programs. Therefore, if you have problems opening the file, you should double check that your JAR file is compatible with the operating system.

    Thank you for reading this post How to Run Java Files (.jar) at Tnhelearning.edu.vn You can comment, see more related articles below and hope to help you with interesting information.

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