Find second index of a character in a string?

Question

How do I find the second index of a character in a string. For instance:

String a="aa{aaaaaaa{aaa}";

I'd like to find the index value of the second { . Here it is 10.

Answer 1

Find the first one, move one right, then find the next one from there. That's the second :)

int secondIndex = a.indexOf('{', a.indexOf('{')+1);

Answer 2

尝试重载版本的indexOf() ，它将起始索引作为第二个参数。

str.indexOf("{", str.indexOf("}") + 1);