Question

求Java高手解答

String realRecList = recList == null?"-1":recList;这句话是什么意思

Answer 1

1、先判断recList == null?"-1":recList;如果recList为null则当前值是“-1”，不为空则为recList

2、再赋值，刚才判断后的值赋给realRecList

Answer 2

java三元表达式
当recList为null的时候realRecList ="-1"'

否则等于recList

Answer 3

当recList 等于null时realRecList = -1，不等null时realRecList = recList。