자바 isNumeric()

1 개요

자바 isNumeric()

public static boolean isNumeric(String input) {
  try {
    Double.parseDouble(input);
    return true;
  }
  catch (NumberFormatException e) {
    return false;
  }
}
...
//true
System.out.println( isNumeric("42") );
System.out.println( isNumeric("3.14") );
System.out.println( isNumeric("1e5") );

// false
System.out.println( isNumeric("A") );

2 같이 보기

• is_number()