如何对具有重复字符的字符串使用substring和indexOf? [英] How to use substring and indexOf for a String with repeating characters?

问题描述

我有以下String myString="city(Denver) AND state(Colorado)"; 它有重复的("和)" ...

I have the following String myString="city(Denver) AND state(Colorado)"; It has repeating "(" and ")"...

如何检索州名，即科罗拉多州.我尝试了以下方法:

How can I retrieve state name, i.e. Colorado. I tried the following:

String state = myString.substring(myString.indexOf("state(")+1,myString.indexOf(")"));

但是它给出了indexOutOfBoundException

有什么方法可以指定我需要myString中的第二个("吗? 我需要结果:String state = "Colorado";

Is there any way to specify that I need the second "(" in myString? I need the result: String state = "Colorado";

推荐答案

使用lastIndexOf.还增加初始偏移量，以允许子字符串state(中的字符数:

Use lastIndexOf. Also increase the initial offset to allow for the number of characters in the sub-string state(:

String state = myString.substring(myString.indexOf("state(") + 6, myString.lastIndexOf(")"));

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