2.0 KiB
2.0 KiB
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Basic Operations |
Basic Operations
Java supports the following operations on variables:
- Arithmetic :
Addition (+)
,Subtraction (-)
,Multiplication (*)
,Division (/)
,Modulus (%)
,Increment (++)
,Decrement (--)
. - String concatenation:
+
can be used for String concatenation, but subtraction-
on a String is not a valid operation. - Relational:
Equal to (==)
,Not Equal to (!=)
,Greater than (>)
,Less than (<)
,Greater than or equal to (>=)
,Less than or equal to (<=)
- Bitwise:
Bitwise And (&)
,Bitwise Or (|)
,Bitwise XOR (^)
,Bitwise Compliment (~)
,Left shift (<<)
,Right Shift (>>)
,Zero fill right shift (>>>)
- Logical:
Logical And (&&)
,Logical Or (||)
,Logical Not (!)
- Assignment:
=
,+=
,-=
,*=
,/=
,%=
,<<=
,>>=
,&=
,^=
,|=
- Others:
Conditional/Ternary(?:)
,instanceof
While most of the operations are self-explanatory, the Conditional (Ternary) Operator works as follows:
expression that results in boolean output ? return this value if true : return this value if false;
Example: True Condition:
int x = 10;
int y = (x == 10) ? 5 : 9; // y will equal 5 since the expression x == 10 evaluates to true
False Condition:
int x = 25;
int y = (x == 10) ? 5 : 9; // y will equal 9 since the expression x == 10 evaluates to false
The instance of operator is used for type checking. It can be used to test if an object is an instance of a class, a subclass or an interface. General format- object instance of class/subclass/interface
Here is a program to illustrate instanecof operator:
Person obj1 = new Person();
Person obj2 = new Boy();
// As obj is of type person, it is not an
// instance of Boy or interface
System.out.println("obj1 instanceof Person: " + (obj1 instanceof Person)); /*it returns true since obj1 is an instance of person */