java compatibility back to 1.6 for demo
java compatibility back to 1.6 for demo

zllbird/Crouton,zhaochuanTeam/Crouton,chwnFlyPig/Crouton,jferlisi/Crouton,mikepenz/Crouton,hgl888/Crouton,wangwangheng/Crouton,simple88/Crouton,xu33liang33/Crouton,keyboardsurfer/Crouton,loulousky/Crouton,hejunbinlan/Crouton,pengleelove/Crouton,hongnguyenpro/Crouton,Brooks0129/Crouton,java02014/Crouton,kzganesan/Crouton,yummy222/Crouton,remind101/Crouton