Jaspersoft Studio 6.20 _top_

Go to Window > Preferences > Java > Installed JREs . Add JDK 8 home and remove any higher versions if present. Failure to do this results in a "String cannot be resolved" error in the expression editor.

: When configuring JDBC drivers, ensure the driver JAR path and class name are correctly specified to avoid "driver not found" errors common in older Studio versions. jaspersoft studio 6.20

Version 6.20 introduced a new HTML5 charting library (based on Highcharts). Unlike the older Flash-based charts, these are responsive, interactive, and export cleanly to PDF/Excel. Go to Window > Preferences > Java > Installed JREs