Compiled class file *.class # Log file *.log # BlueJ files *.ctxt # Mobile Tools for Java (J2ME) .mtj.tmp/ # intelij config files .idea # Package Files # *.jar *.war *.nar *.ear *.zip *.tar.gz *.rar # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml hs_err_pid*