String -> 숫자형
String sNum = "1234";
int i1 = Integer.parseInt(sNum);
int i2 = Integer.valueOf(sNum);
double d1 = Double.parseDouble(sNum);
double d2 = Double.valueOf(sNum);
float f1 = Float.parseFloat(sNum);
float f2 = Float.valueOf(sNum);
long l1 = Long.parseLong(sNum);
long l2 = Long.valueOf(sNum);
short s1 = Short.parseShort(sNum);
short s2 = Short.valueOf(sNum);
숫자형 -> String
int i = 1234;
String si1 = String.valueOf(i);
String si2 = Integer.toString(i);
double d = 1.23;
String sd1 = String.valueOf(d);
String sd2 = Double.toString(d);
float f = (float) 1.23;
String sf1 = String.valueOf(f);
String sf2 = Float.toString(f);
long l = 1234;
String sl1 = String.valueOf(l);
String sl2 = Long.toString(l);
short sh = 1234;
String ss1 = String.valueOf(sh);
String ss2 = Short.toString(sh);
