.J File Extension

3 file types use the .j file extension.

Java Source File

Developer Oracle
Popularity
3.1  |  35 Votes
 

What is a J file?

Contains program source code written in the Java programming language; may include the source code for a complete program or may be one of many files referenced by a Java programming project.

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Java source files most often have a .JAVA extension.

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Programs that open or reference J files

JAR Archive

Developer N/A
Popularity
3.4  |  7 Votes
 

Compressed file archive created with JAR, the successor to the ARJ file compression program (which created .ARJ files); JAR is available in a 16-bit DOS version and a 32-bit Windows version.

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Not related to the .JAR format, which is a Java Archive.

Programs that open J files

Windows
ARJ Software JAR

JPEG Image

Developer N/A
Popularity
2.8  |  6 Votes
 

Compressed graphic that uses .JPEG image compression; may contain thousands of colors, which makes it a good format for storing digital photos; can use different levels of compression, but the more compression is used, the lower the quality of the resulting image.

More Information

Most JPEG files have a .JPG extension.

Programs that open J files

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