JAVA

2. Data Types
Data Type Size Range
byte 1 byte -128 to 127
short 2 bytes -32768 to 32767
int 4 bytes -2,147,483,648 to 2,147,483,647
long 8 bytes -9,223,372,036,854,775,808 to-
9,223,372,036,854,775,807
float 4 bytes Approx. ± 3.4028235E+38F
double 8 bytes Approx. ± 1.7976931348623157E+308
boolean true or false NA, note Java booleans cannot be converted to or
from other types
char 2 bytes Unicode character,
u0000 (or 0) to uFFFF (or 65535)
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3. Type conversion (Casting)
Java automatically converts the source type into target type
This is known as automatic type conversion
For ex.:
float a = 10.6f;
int b;
b = a; //output 10
Type casting refers to the type conversion that is performed explicitly
For Ex.:
int x;
byte n = (byte)x;
long m = (long)x;
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4. long
64 bit
int
32 bit
l
i
int i;
i = (int)l;
l = (long)i;
long l;
l = i;
long
64 bit
int
32 bit
l
i
Widening
Narrowing
Casting example
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5. Operators
• An operator is a symbol that operates on one or more operands to produce
a result
• Java provides rich sets of operators
Operator Name Operators
Arithmetic Operator +, -, *, /, %
Relational Operator >, >=, <, <=, ==, !=
Logical Operator &&, ||, !
Assignment Operator = (+=, -=, *=, /=, %=)
Increment and decrement
Operator
++, --
Prefix (++a), postfix (a++)
Conditional Operator ? : (exp1 ? exp2 : exp3)
Bitwise Operator ~, &, |, ^, >>, <<, >>>
Special Operator instanceof .(dot) ,(comma)
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6. Expression
Expression are the combination of operands and operators
The order of operations is defined through precedence
For Ex.:
x = 10 + 2 * 6
= 10 + 12
= 22
Prepared By VijayaAhire (Asst Prof )

7. Operators in JAVA
• Arithmetic operators
• + addition
• - subtraction
• * multiplication
• / division
• % modulus (gives
reminder)
02-09-2022 7
class Arithmetic
{
public static void main(String[] args)
{
int a = 12 ;
int b = 3 ;
int c = a + b ;
System.out.println("Value of a + b = "+ c);
int d = a - b;
System.out.println("Value of a - b = "+ d);
int e = a * b;
System.out.println("Value of a * b = "+ e);
int f = a / b;
System.out.println("Value of a / b = "+ f);
int g = a % b;
System.out.println("Value of a % b = "+ g);
}
}
C = 15
d = 9
e = 36
f = 4
g = 0

8. Operators in JAVA
• Assignment operators
02-09-2022 8
class Arithmetic
{
public static void main(String[] args)
{
int x =4;
x*=3;
System.out.println("Value of x = "+ x);
}
}
= x = 2 x = 2
+= x += 4 x = x + 4
-= x -= 4 x = x - 4
*= x *= 4 x = x * 4
/= x /= 4 x = x / 4
%= x %= 4 x = x % 4
X=12

9. Operators in JAVA
• Relational operators
02-09-2022 9
Operator Description
== Check if two operand are equal
!= Check if two operand are not equal.
>
Check if operand on the left is
greater than operand on the right
<
Check operand on the left is smaller
than right operand
>=
check left operand is greater than or
equal to right operand
<=
Check if operand on left is smaller
than or equal to right operand
Operator Description
&&
Returns true if both statements
are true
||
Returns true if one of the
statements is true
!
Reverse the result, returns
false if the result is true
• Logical operators

10. Operators in JAVA
• Bitwise operators
02-09-2022 10
Operator Description
& Bitwise AND
| Bitwise OR
^ Bitwise exclusive OR
<< Left shift
>> Right shift