$ grep -l "#java" ~/blog/*

total 4

1. 2014-10-06 Using QtJambi on Windows #java #qt
2. 2012-10-21 Creating an IntelliJ IDEA Project from sbt #intellij-idea #java #sbt #scala
3. 2012-10-13 Error When Launching Eclipse on Ubuntu #java #ubuntu
4. 2012-09-16 Installing Oracle (Sun) Java on Ubuntu 12.04 #java #ubuntu