Apache JAR (.txt) Resource Bundle
· An archive which contains templates for generating the necessary license files and notices for all Apache releases.
Generated files use the .txt file extension as an alternative, no-extension files found in apache-jar-resource-bundle.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window apache-jar-txt-resource-bundle-1.5.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.