연산자

연산자 unary increment prefix: ++x; int x = 5; int y = ++x; System.out.print( x + “, “ + y); unary increment postfix: x++; int x = 5; int y = x++; System.out.print( x + “, “ + y); Output Output File Edit WindowHelp File Edit WindowHelp 6, 6 6, 5

modulus - % int x = 5 % 3; System.out.print(x); Output File Edit WindowHelp 2

modulus - % 짝수? 홀수? if(x % 2 == 0)… 짝수 else…홀수

Compound Operators • x += 5; • x -= 5; • x *= 5; • x /= 5; • x %= 5; int x = 10; • x = x + 5; • x = x – 5; • x = x * 5; • x = x / 5; • x = x % 5; • 15 • 5 • 50 • 2 • 0

Implicit Narrowing Conversion byte b = 2; b = b + 10; byte b = 2; b +=10;

무슨 conversion? • short > int • byte > long • float > long • char > int • char > short • byte > char

무슨 conversion? • short > int • byte > long • float > long • char > int • char > short • byte > char • widening • widening • narrowing • widening • narrowing • narrowing

conversions byte short int long char

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte short int long char

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte short char Narrowing Conversion

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte char short Narrowing Conversion

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte b = 16; char c = No! b;

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte b = 16; char c = b; (char)

65535 127 byte -128 char 0

연산자

연산자

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