Icon of program: Jarfix

Jarfix for Windows

Download now

Used Jarfix for Windows?

Editors’ Review

Download.com staff
Jarfix is a utility designed to effortlessly repair Windows .jar file associations. It ensures Java applications launch correctly by re-linking .jar files to javaw.exe when hijacked by other programs.
Enlarged image for Jarfix
Jarfix 0/1

  • Pros

    • Restores .jar file association to javaw.exe.
    • Simple double-click execution for repair.
    • Fixes hijacked .jar associations on Windows.
    • Provides a quick, automated solution.
    • Avoids manual registry edits or JRE reinstallation.

  • Cons

    • Limited to fixing .jar file associations only.
    • Does not address .jnlp file associations.
    • No mention of advanced configuration options.
    • Operates exclusively within the Windows environment.
Icon of program: Jarfix

Jarfix for Windows

Download now

Used Jarfix for Windows?

Explore More

Full Specifications

GENERAL
Release
Latest update
Version
2.0
OPERATING SYSTEMS
Platform
Windows
Operating System
  • Windows 10
  • Windows 8
  • Windows XP
  • Windows Vista
  • Windows 7
Additional Requirements
None
POPULARITY
Total Downloads
2,347
Downloads Last Week
6
Report Software

Program available in other languages

Last Updated

Developer’s Description

By Johann Lofflmann
Fix the .Jar association on Windows
If you doubleclick on a jar file, and your Java application does not start, your .jar association has been hijacked. You can fix the problem with Jarfix.

The problem:The root cause for the problem above is, that a program has stolen the .jar association. If you have installed the Java Runtime Environment the first time, the file type called "jar" is assigned to javaw.exe correctly. "jar" is an abbreviation for "java archive" and javaw.exe is the correct program to execute a .jar. However, on Windows any program can steal a file type at any time even if it is already associated with a program. Many zip/unzip programs prefer to do this, because a jar is stored in the .zip format. If you doubleclick on a .jar, your pack program opens the file, rather than javaw runs the program, because your pack program ignores the meta information which are also stored in a .jar. In the Oracle bug database there is the low-priority report 4912211 "add mechanism to restore hijacked .jar and .jnlp file extensions", but it has been closed as "Closed, Will Not Fix".

The workaround: Reinstall the Java Runtime Environment or fix the Windows Registry manually each time this problem occurs.

The solution: You can fix this problem very easy with the small but reliable Downloadjarfix.exe program. Just doubleclick on it to restore the .jar association with javaw.exe.

Download.com
Your review for Jarfix