java - Fastest way to check if comma separated string contains at least 1 valid integer? -

i have string comma separated positive integers, example:

1,34,433,12 

what fastest way determine if string contains @ least 1 integer?

right split(","), loop on resulting string[] , try parse each element int.

this works in order list<integer> of string want fastest way possible determine if string valid this.

1a,2b,13 acceptable. 1a,2b,13c not acceptable.

try:

public static boolean containsint(string string) {     boolean onlydigits = true;     boolean atleastonedigit = false;     int len = string.length();     (int = 0; < len; i++) {         char c = string.charat(i);         if (c == ',') {             if (atleastonedigit && onlydigits) {                 return true;             }             onlydigits = true;             atleastonedigit = false;             continue;         }         boolean isdigit = c >= '0' && c <= '9';         onlydigits &= isdigit;         atleastonedigit |= isdigit;     }     return atleastonedigit && onlydigits; } 

now, more readable version using guava:

public static boolean containsint(string text) {     (string s : splitter.on(',').split(text) {         if (ints.tryparse(s) != null)             return true;     }     return false; }