[Java] 자바 형 변환 예제 (Type Cast Examples)

int to String

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

String to int

int i = Integer.parseInt(str);
int i = Integer.valueOf(str).intValue();

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;

 

Java 형변환 (source : techvidvan)