1) downlaod   www.eclipse.org/downloads or use wget

2) decompress the file use  tar commend:

 tar -zxvf eclispse-standard-.......tar.gz  -C /opt

3) change the permissions use chmod

chmod -R +r /opt/eclipse

4) create excutable bash for eclipse

vi  /usr/bin/eclipse

#!/bin/shexport ECLIPSE_HOME="/opt/eclipse"$ECLIPSE_HOME/eclipse $*

5) add desktop launcher

vi /usr/share/applications/eclipse.desktop

[Desktop Entry]Encoding=UTF-8Name=EclipseComment=Eclipse lunaExec=eclipseIcon=/opt/eclipse/icon.xpmTerminal=falseType=ApplicationCategories=GNOME;Application;Development;StartupNotify=true

6) start: use command or double-click the icon

install eclipse on centos