新しく環境を用意してみた。
1. download java
http://www.oracle.com/technetwork/jp/java/javase/downloads/index.html
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
2. download eclipse
https://www.eclipse.org/downloads/download.php?file=/oomph/epp/neon/R2a/eclipse-inst-win64.exe