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 JAVA
 
 

ǴԹ(Operators) ӴѺ㹡û

 

ǴԹ÷ҧԵʵ (Arithmetic Operators)

ͤ觾鹰ҹ㹡÷ͧżšäӹdz鹰ҹҧԵʵ úǡ ź ٳ ǴԹеǨӴѺûżŵ˹ ѧҧ 㹡ûżŨӨҡҧ仢 Шзӡûżǧ纡͹

Operator

ٻẺ С÷ӧҹ

ӴѺ㹡ûż

"*"(Multiply)

ҼŤٳ

1

"/" (Divide)

Ҽ

2

"%" (Modulus)

ɷͨҡ

3

"+" (Add)

úǡ

4

"-" (Minus)

op1-op1:ź

5

ҧ ǴԹ÷ҧԵʵ

class BasicMath{

public static void main (String args[]){

int a = 1 + 1; int b = a * 3; int c = b / 4;

int d = b " a; int e = -d; int f = 9%5;

System.out.println("a = " + a); System.out.println("b = " + b);

System.out.println("c = " + c); System.out.println("e = " + e);

System.out.println("9%5 = " + 9%5);

}

}

 

ǴԹѹ (Relational Operators)

͵ǴԹ÷˹ҷººҧͧ ͹ԾͧԾ ¨Ф׹繨ԧ (Boolean)

Relational Operator

ҧ

<

Op1<Op2 : ׹Ҥ繨ԧ Op1 ¡ Op2

a=(1<3); //aդ繨ԧ

<=

Op1<=Op2 : ׹Ҥ繨ԧ Op1 ¡ Op2 ҡѺ Op2

a=(5<=7); //a դ繨ԧ

>

Op1>Op2 :׹Ҥ繨ԧ Op1 ҡ Op2

a=(5>7); //a դ繨ԧ

>=

Op1>=Op2 : ׹Ҥ繨ԧ Op1 ҡ ҡѺ Op2

a=(5>=7); //a դ繨ԧ

==

Op1==Op2 : ׹Ҥ繨ԧ Op1 ҡѺ Op2

a=(5==7); // a դ 5 ҡѺ 7

!=

Op1!=Op2 : ׹Ҥ繨ԧ Op1 ҡѺ Op2

a=(5!=7); // a դ繨ԧ 5 ҡѺ 7

":

(expression)"a:b :ͤҵ operand a expression 繨ԧ

a=(3>5)"false:true; //a դ繨ԧ мšº 3 ҡ 5 ͤҷ稨͡ true

 

ǴԹõá (Logical Operators)

ǴԹ÷ҧáШзӻżšѺû Boolean ԾҢͧ繨ԧ

ҤԧǷ1

ҤԧǷ2

šûẺ AND

šûẺ OR

šûẺ XOR

true 1

true 1

true 1

true 1

false 0

true 1

false 0

false 0

true 1

true 1

false 0

true 1

false 0

true 1

true 1

false 0

false 0

false 0

false 0

false 0

 

ٻẺͧ Boolean Operator еҧûż

Operator

ٻẺ С÷ӧҹ

ҧ

! (NOT)

!(Op1) ¹Ҥԧ繤ҵçѹ

a= !(true); // a դ

&&(AND)

Op1 && Op2 ׹Ҥԧ Op1 ҡѺ Op2

a= !(true && false); // a դ

|| (OR)

Op1 || Op2 ׹Ҥԧ Op1 ҡѺ Op2

a= !(true); // a դ

ҧ Operator Ẻ boolean

class BoolLogic{

public static void main(String args[]){

boolean a = true; boolean b = false;

boolean c = a | b; boolean d = a & b;

boolean e = a ^ b; boolean f = (!a & b) | (a & !b);

boolean g = !a;

System.out.println("a = " + a); System.out.println("b = " + b);

System.out.println("a | b = " + c); System.out.println("a & b = " + d);

System.out.println("a ^ b = " + e); System.out.println("!a = " + g);

System.out.println("!a & b | a & !b = " + f);

}

}

 

ǴԹдѺ (Bitwise Operator)

㹡èѴ红Ż Interger, short, int long ٻẺԵ С红ŨẺͧ

Operator

ٻẺ С÷ӧҹ

ҧ

Ѿ

~

~ Op : complement ӡ¹ҢͧԵ 1 0 ¹Եդ 0 1

a= 0x0005

-6

<<, >>

ºԵ价ҧ зҧ

a= 0x0005 << 2
a= 0x0005 >> 2
20
1

>>>

ºԵ价ҧ͹ͧ

a= 0x0005 >>> 2
a= 0xFFF5 >>> 2
1
16381

&

żẺ Bitwise AND

a= 0x0005 & a = 0x0007;

5

^

żẺ Bitwise XOR

a= 0x0005 ^ a= 0x0007;

2

|

żẺ Bitwise OR

a= 0x0005 | a= 0x0007;

7

 

ӴѺ㹡ûŢͧ Operators ҧ

ǡз (Operators)

ӴѺ

ͧûż

() ǧ

1

++(Increment), --(Decrement), +(Unary plus), -(unary minus)

!(Not)

~(Complement)

(type_cast)

2

äӹdz

äӹdz

Boolean

integer

ءٻẺ

*(Multiply),/(Divide),%(modulus)

3

äӹdz

+(Add),-(subtract)

4

äӹdz

<< (Left shift),>>(Right shift),>>>(zero fill)

5

ӹǹ

< (Less than), <==(less than or equal), >(greater than), >==(greater than or equal)

Instanceof()

6

äӹdz object, (ºº object)

==(Equal),!=(not equal)

7

ž鹰ҹ object

&(Bitwise AND)

8

ӹǹ

^ (Bitwise XOR)

9

ӹǹ

| (Bitwise OR)

10

ӹǹ

s&& (AND)

11

Boolean

|| (OR)

12

Boolean

":

13

Boolean

= ,*= , /=, %=, +=, -=, <<=, =>>, >>>, &=, ^=, !=

14

 

ҧ äӹdz Operator1

class OpEquals{

public static void main (String args[]){

int a =1; int b = 2; int c = 3;

a += 5; b *= 4;

c +=a * b; c %=6;

System.out.println("a = " + a); System.out.println("b = " + b);

System.out.println("c = " + c);

}

}

 

ҧ äӹdz Operator2

class IncDec{

public static void main(String ars[]){

int a = 1; int b = 2;

int c = ++b; int d = a++;

c++;

System.out.println("a = " + a); System.out.println("b = " + b);

System.out.println("c = " + c); System.out.println("d = " + d);

}

}

 

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