Java Programming - Operators

Operators

2 november

Operators are used to perform operations on variables and values.

• Arithmetic Operators
• Assignment Operator
• Bitwise Operators
• Relational Operators
• Boolean Logical Operators
• Ternary (?) Operator

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Arithmetic Operators

2 november

• Arithmetic operators are used in mathematical expressions in the same way

that they are used in algebra.

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Assignment Operator

2 november

• The assignment operator is the single equal sign, =.
• The assignment operator works in Java much as it does in any other computer

Language.

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var = expression;

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int x, y, z;

x = y = z = 100; // set x, y, and z to 100

Bitwise Operators

2 november

• Java defines several bitwise operators that can be applied to the integer types:

long, int, short, char, and byte. These operators act upon the individual bits of

their operands.

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Relational Operators

2 november

• The relational operators determine the relationship that one operand has to the

other

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Boolean Logical Operators

2 november

• The Boolean logical operators operate only on boolean operands.
• All of the binary logical operators combine two boolean values to form a

resultant boolean value.

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The ? Operator

Output

2 november

• Java includes a special ternary (three-way) operator that can replace certain

types of if-then-else statements.

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Syntax:

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expression1 ? expression2 : expression3 ;

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Example:

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x = a < 1 ? -1 : 2;

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Operator Precedence

2 november

• Operators in the same row are equal in precedence
• Order of precedence for Java operators, from highest to lowest

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Using Parentheses

2 november

• Parentheses raise the precedence of the operations that are inside them.

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a >> b + 3

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• a >> (b + 3) // This expression first adds 3 to b and then shifts a right by that result.

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• (a >> b) + 3 // This expression first shift a right by b positions and then add 3 to that result

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Arithmetic Operators

The Modulus Operators

Output

Arithmetic Compound Assignment Operators

Output

• Java provides special operators that can be used to combine an arithmetic

operation with an assignment.

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a = a + 4; ----> a += 4;

a = 6

b = 8

c = 3

Increment and Decrement Operators

Output

• The increment operator increases its operand by one. The decrement

operator decreases its operand by one.

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x = x + 1; ----> x++;

x = x - 1; -----> x--;

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y = ++x; ----> x = x + 1;

y = x;

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y = x++; -----> y = x;

x = x + 1;

The Bitwise Logical Operators

Output

• The bitwise logical operators are &, |, ^, and ~. Bitwise operators are applied to each individual bit within each operand

The Left Shift Operators

Output

• The left shift operator, <<, shifts all of the bits in a value to the left a specified

number of times. It has this general form:

value << num

The Right Shift Operators

Output

Output

Signed right shift operator, >>, shifts all of the bits in a value to the right a specified number of times. Its general form is shown here:

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value >> num

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>>> (Unsigned right shift) In Java, the operator ‘>>>’ is unsigned right shift operator. It always fills 0 irrespective of the sign of the number.

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Bitwise Operator Compound Assignments

Output

a = 3

b = 1

c = 6

Relational Operators

The relational operators determine the relationship that one operand has to the other.

class Main {

public static void main(String[] args) {

int a = 7, b = 11;

System.out.println("a is " + a + " and b is " + b);

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// == operator

System.out.println(a == b); // false

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// != operator

System.out.println(a != b); // true

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// > operator

System.out.println(a > b); // false

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// < operator

System.out.println(a < b); // true

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// >= operator

System.out.println(a >= b); // false

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// <= operator

System.out.println(a <= b); // true

}}

Boolean Logical Operators

Output

The relational operators determine the relationship that one operand has to the other.

Thank You