java - Find character in a number which is in String format -

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how can find string in number?

a simple example follows

private char check() {         string sample ="1212kkk";//121hhh444 | 12-22         return 'k';//'h' | '-'      }

if other number want return value.

how can first character ring?

try this: 

string result = sample.replaceall("\\d" ,""); return result;

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