Java/숫자와문자사이변환

1. �� 꾸기

int i = 639;
String str = String.valueOf ( i );
String str = Integer.toString ( i );
String str = i.toString ( );
String str = "" + i;

2. �� 꾸기

String str = "639";
int i = Integer.valueOf ( str ).intValue ( );
int i = Integer.parseInt ( str );
long i = Long.parseLong ( str )
double j = Double.valueOf ( str ).doubleValue ( );

��고:

01, 02, ... , 09 String ��
int i_month = Integer.parseInt(s_month); �� 1, 2, 3 ... �� 군...

3. 기��

Float�� Integer�� 꾸기

float f = 3.25;
int i = ( int ) f;

double d = ( double ) i; // ��

Object�� int �� 기 ... �� String�� 꾼�� int�� .
Integer.parseInt ( vector.elementAt ( 0 ).toString () );