J files exist as 3 different types. Please find information about each of them below.
Type 1: Java Source File
General Information
| Title | JAVA Source File |
| Extension | .java |
| Full Form | Java Source Code File |
| File Type | Source Code File |
| Developer | Sun Microsystems |
| MIME Type | text/x-java-source, text/plain |
File Function
| Primary Function | Contain Java source code |
| Additional Functions | Compile to bytecode |
| Features | Cross-platform, Object-oriented, Strongly-typed |
File Characteristics
| Quality | Code dependent |
| Supports Layers | N/A |
| Supports Transparency | N/A |
| Editable | Yes |
| Text-Based | Yes |
| Binary | No |
Use Cases
| Software Development | Yes |
| Web Applications | Yes |
| Mobile Apps | Yes |
| Enterprise Systems | Yes |
Security and Practices
| Security Risks | Code injection, Malware |
| Best Practices | Code review, Secure coding, Unit testing |
Historical/Version Information
| Initial Release | 1995 |
| Latest Version | Java 18 (2022) |
Associated Types
| Compiled Code | .class |
| Archives | .jar, .war, .ear |
| Documentation | .javadoc |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
 Oracle JDK |
Free, Commercial | Windows, Mac, Linux, Solaris |
 Eclipse IDE |
Free | Windows, Mac, Linux |
 IntelliJ IDEA |
Free, Commercial | Windows, Mac, Linux |
 Apache NetBeans |
Free | Windows, Mac, Linux |
 Visual Studio Code |
Free | Windows, Mac, Linux |
Type 2: JAR Archive
General Information
| Title | JAR File Extension |
| Extension | .jar |
| Full Form | Java Archive File |
| File Type | Archive File |
| Developer | Sun Microsystems |
| MIME Type | application/java-archive |
File Function
| Primary Function | Packaging bytecode |
| Additional Functions | Distribute Java applications |
| Features | Compression, Portability |
File Characteristics
| Quality | High compression |
| Supports Layers | N/A |
| Supports Transparency | N/A |
| Editable | Indirectly |
Use Cases
| Software Development | Yes |
| Enterprise Applications | Yes |
| Embedded Systems | Yes |
Security and Practices
| Security Risks | Executable code, Malware |
| Best Practices | Signature verification, Secure manifest |
Historical/Version Information
| Initial Release | 1995 |
| Latest Version | Java SE 17 (2021) |
Associated Types
| Similar Extensions | .java, .class, .war, .ear |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
| Oracle JDK |
Free, Commercial | Windows, Mac, Linux, Solaris |
 WinRAR |
Free, Shareware | Windows, Mac, Linux |
| 7-Zip |
Free | Windows, Linux |
Type 3: JPEG Image
General Information
| Title | JPEG File Extension |
| Extension | .jpg, .jpeg |
| Full Form | Joint Photographic Experts Group Image |
| File Type | Image File |
| Developer | Joint Photographic Experts Group |
| MIME Type | image/jpeg |
File Function
| Primary Function | Store images |
| Additional Functions | Store photographs, Web graphics |
| Features | Lossy compression, Widely supported |
File Characteristics
| Quality | Adjustable |
| Supports Layers | No |
| Supports Transparency | No |
| Editable | Yes |
Use Cases
| Digital Photography | Yes |
| Web Publishing | Yes |
| Printing | Yes |
Security and Practices
| Security Risks | Malware embedding |
| Best Practices | Scan for viruses, Metadata privacy |
Historical/Version Information
| Initial Release | 1992 |
| Latest Standard | JPEG XL (2021) |
Associated Types
| Similar Extensions | .png, .gif, .tiff |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
 Adobe Photoshop |
Paid | Windows, Mac |
 GIMP |
Free | Windows, Mac, Linux |
 Microsoft Paint |
Free | Windows |