sudo /Users/username/Softwares/eclipse/Eclipse.app/Contents/MacOS/eclipse

$ java -version
openjdk version "1.8.0_102"
OpenJDK Runtime Environment (build 1.8.0_102-8u102-b14.1-2-b14)
OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)

eclipse -clean

eclipse -vm /usr/local/java/jre1.7.0_67/bin/java

eclipse -vm /usr/lib/jvm/java-8-openjdk-i386/bin/java

-vm E:/sw/java/jdk1.8.0_91/bin/javaw.exe