CLASS file format description
Many people share .class files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .class file can be edited, converted or printed with. On this page, we try to provide assistance for handling .class files.
1 filename extension(s) found in our database.
.class - Java Class Data
The CLASS application files are related to Java Runtime Environment. CLASS file is a Java Class Data. CLASS file contains bytecodes for the Java Virtual Machine. Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
- Java Runtime Environment
- Application files
- - / -
- cla, clas, cls
- Java Class Data related extensions:
Naturally, other applications may also use the .class file extension. Even harmful programs can create .class files. Be especially cautious with .class files coming from an unknown source!
Can't open a .class file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows can't open this file:
To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.
To avoid this error, you need to set the file association correctly.
- Open Control Panel > Control Panel Home > Default Programs > Set Associations.
- Select a file type in the list and click Change Program.
The .class file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
Similar file extensions in our database:
- Java Class Data
DataTypes.net currently supports the following operating systems:
Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android
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