Created
April 28, 2016 14:18
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class ToInt{ | |
//InputStream 구현시 read() 메서드는 byte 값이 아닌 int 값을 반환 하는데 | |
//Stream 이 끝일 경우 -1을 반환하는 규약이 있어 음수를 사용 하지 못해 | |
//byte 보다 큰 int 로 리턴하는 것이고 0 ~ 255(128 + 127) 까지 의 숫자를 리턴한다 | |
public static int toInt(byte b) { | |
return (-(b-127)/128)*256+b; | |
} | |
public static void main(String[] args){ | |
byte b = -128; | |
System.out.println(toInt(b)); | |
b = 0; | |
System.out.println(toInt(b)); | |
b = -127; | |
System.out.println(toInt(b)); | |
b = 127; | |
System.out.println(toInt(b)); | |
b = -1; | |
System.out.println(toInt(b)); | |
} | |
} |
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