The following matrix shows what Java version is necessary to run a specific Weka version. It also specifies when a changeover happened, listing date and Subversion revision (the number prefixed with r).
| Java | |||||
| 1.4 | 1.5 | 1.6 | 1.7 | ||
| WEKA | <3.4.0 | X | X | X | X |
| 3.4.x | X | X | X | X | |
| 3.5.x | 3.5.0-3.5.2 | >3.5.2 r2892, 20/02/2006 |
X | X | |
| 3.6.x | X | X | X | ||
| 3.7.x | 3.7.0 | >3.7.0 r5678, 25/06/2009 |
X | ||
Note that Java 5.0 and later in combination with Linux/Gnome has problems with the default Look'n'Feel. A workaround for the problem was introduced with version 3.4.5/3.5.0. For more information refer to the Troubleshooting Wiki article. From Weka 3.6.5/3.7.4 Mac OS X users will need Java for Mac OS X 10.6 Update 3 (java 1.6.0_22) or later.