Java Basics Summary (third, operator)

Third, Operators operators

Assignment Operators (Assignment operator)

= + = =%= *=/= <<= >>= >>>= &= ^= |=

public class Bytedemo {public    static void Main (string[] args) {        byte b1=2;        byte b2=3;        B1= (Byte) (B1+B2);  addition, turn int        b1+=b2;            Assignment, do not go int    }}

B1+=B2; and b1=b1+b2; Is it exactly equivalent?

The answer is in the negative. The byte type parameter and operation are converted to type int first, so coercion type conversion is required. (Can put "B11+=B2;" As to "b1= (byte) (B1+B2);" The optimization! )

Comparison Operators (comparison operator)

> >= < <= instanceof

Equality Operators (same operator)

= = =

Arithmetic Operators (arithmetic operator)

+       -       *       /        %

Shift Operators (shift operator)

>> << >>>

public class Test {public static void main (string[] args) {String S1 = integer.tobinarystring (-1); System.out.println (S1); 11111111,11111111,11111111,11111111int I1 = integer.valueof ("1111111100000000", 2); System.out.println (I1); 65280int i2 = i1 >> 1; System.out.println (integer.tobinarystring (I2)); 01111111,10000000int i3 = I1 << 1; System.out.println (integer.tobinarystring (i3)); 00000001,11111110,00000000int i4 = i1 >>> 1; System.out.println (Integer.tobinarystring (I4)); 01111111,10000000//0-bit extension and sign bit extension System.out.println (integer.tobinarystring ( -1 >> 1)); 11111111,11111111,11111111,11111111// -1system.out.println (integer.tobinarystring ( -1 >>> 1)); 01111111,11111111,11111111,11111111//2147483647}}

Bitwise Operators (bitwise operator)

& | ^ (Bitwise XOR) ~ (bitwise reversed)

Logic Operators (logical operator)

&& & | |　　| ！

Conditional Operators (conditional operator)

?:

public class Test {public static void main (string[] args) {Boolean b = true;int i = b? 1:2; System.out.println (i);//1}}

　　

Other operators

+ +--

public class Testaction {public static void main (string[] args) {int i = 2; System.out.println (i++);//2system.out.println (i);//3int a = i++ + i;//3+4=7system.out.println (a); int b = i++ + ++i;//3 +5=10i++; System.out.println (b); System.out.println (i);//7for (int j = 0; J <; J + +) {i = i++;} System.out.println (i);//7}}

　　

Java Basics Summary (third, operator)