InPro

자바 문자열이 숫자인지 확인하기 Double.parseDouble public class NumbericYn { public static void main(String[] args) { String str = '123.0'; boolean numberYn = parseDouble(str); System.out.println(numberYn); } public static boolean numbericYn(String str) { try { Double.parseDouble(str); return true; } catch (NumberFormatException ex) { return false; } } } Apache Commons Lang public class NumbericYn { p..