log.info "starting"
// we use class to create objects of a class
Planet p1 = new Planet()
Planet p2 = new Planet()
Planet p3 = new Planet()
p1.name = "earth"
p1.shape = "circle"
p2.name = "jupiter"
p2.shape = "circle"
p3.name = "mars"
p3.shape = "circle"
log.info p1.name+" "+p1.shape
log.info p2.name+" "+p2.shape
log.info p3.name+" "+p3.shape
p1 = p2
log.info "*************************************"
log.info p1.name+" "+p1.shape
log.info p2.name+" "+p2.shape
log.info p3.name+" "+p3.shape
p1.name = "pluto"
log.info "*************************************"
log.info p1.name+" "+p1.shape //pluto
log.info p2.name+" "+p2.shape //pluto
log.info p3.name+" "+p3.shape
class Planet{
def name
def shape
}
运行结果：
Tue Oct 06 20:41:45 CST 2015:INFO:starting Tue Oct 06 20:41:45 CST 2015:INFO:earth circle Tue Oct 06 20:41:45 CST 2015:INFO:jupiter circle Tue Oct 06 20:41:45 CST 2015:INFO:mars circle Tue Oct 06 20:41:45 CST 2015:INFO:************************************* Tue Oct 06 20:41:45 CST 2015:INFO:jupiter circle Tue Oct 06 20:41:45 CST 2015:INFO:jupiter circle Tue Oct 06 20:41:45 CST 2015:INFO:mars circle Tue Oct 06 20:41:45 CST 2015:INFO:************************************* Tue Oct 06 20:41:45 CST 2015:INFO:pluto circle Tue Oct 06 20:41:45 CST 2015:INFO:pluto circle Tue Oct 06 20:41:45 CST 2015:INFO:mars circle