Java 형변환 정리

//int to string
String myString = Integer.toString(my int value);
String str = "" + i;


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


//double to String
String str = Double.toString(i);


//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
int i = 42;
String binstr = Integer.toBinaryString(i);


//decimal to hexadecimal
int i = 42;
String hexstr = Integer.toString(i, 16);
String hexstr = Integer.toHexString(i);
--(with leading zeroes and uppercase)
public class Hex {
    public static void main(String args[]){
        int i = 42;
        System.out.print(Integer.toHexString( 0x10000 | i).substring(1).toUpperCase());}
}


//hexadecimal (String) to integer
int i = Integer.valueOf("B8DA3", 16).intValue();
int i = Integer.parseInt("B8DA3", 16);    


//ASCII code to String
int i = 64;
String aChar = new Character((char)i).toString();


//integer to ASCII code (byte)
char c = 'A';
int i = (int) c; // i will have the value 65 decimal


//integer to boolean
b = (i != 0);


//boolean to integer
i = (b)?1:0;