Support for Java 7 was introduced in:

  • DbVisualizer 8.0 for Windows
  • DbVisualizer 8.0 for Linux/UNIX
  • DbVisualizer 9.1 for macOS

Java 7 is not supported from DbVisualizer 10.0 which requires Java 8.

If running a version older than the above it will fail with Java 7 on respective platform with the following error at startup:

javax.swing.KeyStroke cannot be cast to java.lang.Comparable

Check this FAQ how to modify what Java version DbVisualizer should use.