.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.
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
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.
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Most JPEG files have a .JPG extension.