Arithmetic operators for Java Note 2

What is the 1 operator?

Operators that operate on constants and variables

What are the 2 operators divided into

Arithmetic operators (+,-, *,/),

Assignment operators

Comparison operators

logical operators

Bitwise operators

Trinocular operator

3 operator

　　Considerations for a arithmetic operator

(1) Integer division can only be integers, if you want a decimal, you must change the data to a floating-point number type

(2)/Gets the quotient of the division operation,% gets the remainder of the division operation

Code detection

classOperatordemo { Public Static voidMain (string[] args) {//Defining Variables        intx = 3;//assign 3 to variable x of type int        inty = 4; SYSTEM.OUT.PRINTLN (x+y); SYSTEM.OUT.PRINTLN (x-y); SYSTEM.OUT.PRINTLN (x*y); SYSTEM.OUT.PRINTLN (x/y);//dividing integers can only get integers//I want to get a decimal, the swelling? //simply change any of the data in the operation to a floating-point numberSystem.out.println (x*1.0/y); //% of ApplicationsSystem.out.println (x%y);//the remainder is obtained.    }}

　Use of the,--operator for B + +:
Used alone:
Put in front of the operand and follow the same effect. (This usage is more common to us)
Participate in the operation using:
Put in front of the operand, increment or decrement first, and then participate in the operation.
After the operand, it participates in the operation, then increases or is self-reduced.
Function: The variable is self-increment 1 or self-minus 1.

Practice Topics

1 classOperatortest {2      Public Static voidMain (string[] args) {3         intA = 10;4         intb = 10;5         intc = 10;6 7A = b++;//a=10,b=11,c=108c =--a;//a=9,b=11,c=99b = ++a;//a=10,b=10,c=9TenA = c--;//a=9,b=10,c=8 One          ASystem.out.println ("A:" +a); -System.out.println ("B:" +b); -System.out.println ("C:" +c); theSystem.out.println ("--------------"); -          -         intx = 4; -         inty = (x + +) + (++x) + (x*10); +         //4+6+60 -         //x=5,6 +          ASystem.out.println ("x:" +x); atSystem.out.println ("Y:" +y); -     } -}

Use of C +:
A: Addition
B: plus sign
C: String connector

1 classOperatorDemo3 {2      Public Static voidMain (string[] args) {3         //addition4System.out.println (3+4);5         6         // Plus7System.out.println (+4);8         9System.out.println (' a ');TenSystem.out.println (' a ' + 1);//Here's the addition . One          A         //String Connector -System.out.println ("Hello" + ' a ' +1); -System.out.println (' A ' +1+ "Hello"); the     } -}

Arithmetic operators for Java Note 2