Last year we have migrated one of our application from Java 5 to Java 6. The Java 6(OpenJDK) installation was done by client on a fresh system. After installing our application (under JBoss app), we found the fonts on JFreeCharts and on the images generated from AWT were not correct. We have solved the issue by configuring the fonts at JVM level. Let understand it better. How AWT / JFreeCharts shows the fonts AWT rely on native fonts, it usages default Java fonts (which best fits) if no native fonts mapping found.