liberation
· JasperReports Font Package Containing the Liberation fonts. This font package will register the fonts as Arial, Times New Roman, and Courier New.
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 jasperreports-fonts-liberation-2.1.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.