자주쓰는 자바 형변환 모음
자바에서 자주쓰는 형변환들 정리해 보았어요
from integer to String
String str = Integer.toString(i);
String str = "" + i;
from String to integer
int i = Integer.parseInt(str);
int i = Integer.valueOf(str).intValue();
from double to String
String str = Double.toString(d);
long to String
String str = Long.toString(l);
float to String
String str = Float.toString(f);
String to double
double d = Double.valueOf(str).doubleValue();
String to long
long l = Long.valueOf(str).longValue();
long l = Long.parseLong(str);
String to float
float f = Float.valueOf(str).floatValue();
decimal to binary
String binstr = Integer.toBinaryString(i);
decimal to hexadecimal
String hexstr = Integer.toString(i, 16);
String hexstr = Integer.toHexString(i);
Integer.toHexString( 0x10000 | i).substring(1).toUpperCase());
hexadecimal(String) to int
int i = Integer.valueOf("B8DA3", 16).intValue();int i = Integer.parseInt("B8DA3", 16);
ASCII Code to String
String char = new Character((char)i).toString();
Integer to ASCII Code
int i = (int) c;
Integer to boolean
boolean b = (i != 0);
boolean to Integer
int i = (b)? 1 : 0;