I have a new centos 4.1 install and installed java-sdk using yum. When I try to execute the following, I get an exception error: root at blh fileIndexer]# java -Xmx256m -jar FileIndexer-1.1.5.jar Warning: -Xmx256m not understood. Ignoring. Warning: -jar not understood. Ignoring. Exception in thread "main" java.lang.NoClassDefFoundError java-1.4.2-gcj-compat-1.4.2.0-27jpp is the only reference to java I have with rpm -q How can I fix this?