/*
Assignment operator
(1) += a +=3 is equivalent to a=a+3
(2) -= a -=3 is equivalent to a=a-3
(3) *= a *=3 is equivalent to a= a*3
(4)/= a /=3 is equivalent to a=a/3
(5)%= a %=3 is equivalent to a=a%3
Note: Only variables can use the assignment operator
*/
public class fx{ public static void main(String[] args){ int a=10; a+=5; System.out.println(a);//15 } }
/*
Comparison operators
(1) greater than >
(2) less than <
(3) greater than or equal to >=
(4) less than or equal to <=
(5) equal ==
(6) not equal !=
Matters needing attention: (1) The result of the comparison operator must be a boolean type, which is true, and false if it is not established
(2) If multiple judgments are made, it cannot be written in succession, such as 1<x<3
*/
public class fx{ public static void main(String[] args){ int a=10; int b=20; int c=20; System.out.println(a>b);//false System.out.println(a<b); //true System.out.println(a>=b);//flase System.out.println(a<=b);//true System.out.println(a==b);//false System. out.println(a!=b);//ture System.out.println(b==c);//true } } /* Logical operator (1) and && are true (2) or || one is true
(3) Not ! Negative
"&&" "||" at the same time has a short-circuit effect: if the left side can already judge the final result, the right side will not be executed
Note: (1) Logical operators can only be used for boolen type
(2) && || requires a boole type on the left and right, but as long as there is a unique boole type for negation
(3) && || If multiple conditions can Write
two conditions in a row: Condition A && Condition B
Multiple conditions: Condition A && Condition B && Condition C
TLPS
For the case of 1<x<3, it should be split into two parts, and then connected with the AND operator
int x=2
1< x&&x<3
*/
public class fx{ public static void main(String[] args){ System.out.println(true&&false);//false System.out.println(true&&true);//true System.out.println( 3<5&&5<6);//true System.out.println(true||true);//true System.out.println(true&&false);//true System.out.println(false&&false);//false System.out.println(true);//true
System.out.println(!true);//false
//Short -circuit
int a=10;
System.out.println(3>4&&++a<20);//true The left side can already judge the final result, the right side will Not executing
System.out.println(a);//10
int b=20;
System.out.println(3<4||++b<30);//true The left side can already judge the final result, the right side will Not executing
System.out.println(b);//20
}
} 
/*
Ternary operator
(1) Unary operator An operator that only needs one data to operate! ++ --
(2) Binary operator An operator that requires two data to operate + -
(3) Ternary operator An operator that requires three data to operate
Format: data type variable name = conditional judgment? Expression A: Expression B;
Process First, determine whether the expression is
true. If the expression A is assigned to the variable
, it is false. The expression B is assigned to the variable
. Note:
(1) It must be ensured that both expression A and expression B are consistent with The data type of the left variable
(2) The result of the ternary operation must be used
*/
public class fx{ public static void main(String[] args){ int a=10; int b=20; int max=a>b ?a:b; System.out.println("The maximum value is: "+max); System.out.println(a>b?a:b);//Correct spelling } }
