Add javac wrapper script.

diff --git a/java/javac.sh b/java/javac.sh
new file mode 100755 (executable)
index 0000000..a8fcc03
--- /dev/null
+++ b/java/javac.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+${JAVA_HOME}/bin/javac $*