正负为24的数字区间，两位小数，小数位可有可无

Question

"^((\-)?([0-9]|(1[0-9]|2[0-3]))(?:\\.[0-9]{0,2}$))|((\-)?(2[4])(?:\\.[0]{0,2}))$"
这段正则为什么必须输入小数，匹配不了整数呢？

Answer 1

"^((\-)?([0-9]|(1[0-9]|2[0-3]))(?:\\.[0-9]{0,2}$))|((\-)?(2[4])(?:\\.[0]{0,2}))$"

这样试试

"^((\-)?([0-9]|(1[0-9]|2[0-3]))(?:\\.[0-9]{0,2}$))|((\-)?(2[4])(?:(\\.(\\d){0,2})))$"