names = ['Ken' : 'Barclay', 'John' : 'Savage'] divisors = [4 : [2], 6 : [3, 2], 12 : [6, 4, 3, 2]] println(names['Ken']) //通过key显示value println(names.Ken)//通过key显示value println(names['Jessie'])//通过key显示value,key不存在显示null println(divisors[6])//通过key显示value divisors[6] = [6, 3, 2, 7]//通过key改变value println(divisors[6]) map = ['Ken' : 2745, 'John' : 2746, 'Sally' : 2742] map.put('Bob', 2713) println(map) println(map.containsKey('Ken')) println(map.get('David', 9999)) //返回David的value,如果没有David,返回9999 println(map.get('Billy')) println(map.keySet()) println(map.size()) println(map['Ken'])