Operators in Java

 Operators in Java

Operator in Java is a symbol that is used to perform operations. For example: +, -, *, / etc.

There are many types of operators in Java which are given below:

  • Unary Operator,
  • Arithmetic Operator,
  • Shift Operator,
  • Relational Operator,
  • Bitwise Operator,
  • Logical Operator,
  • Ternary Operator and
  • Assignment Operator.

Java Operator Precedence

Operator TypeCategoryPrecedence
Unarypostfixexpr++ expr--
prefix++expr --expr +expr -expr ~ !
Arithmeticmultiplicative* / %
additive+ -
Shiftshift<< >> >>>
Relationalcomparison< > <= >= instanceof
equality== !=
Bitwisebitwise AND&
bitwise exclusive OR^
bitwise inclusive OR|
Logicallogical AND&&
logical OR||
Ternaryternary? :
Assignmentassignment= += -= *= /= %= &= ^= |= <<= >>= >>>=

Java Unary Operator

The Java unary operators require only one operand. Unary operators are used to perform various operations i.e.:

  • incrementing/decrementing a value by one
  • negating an expression
  • inverting the value of a boolean

Java Unary Operator Example: ++ and --

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int x=10;  
  4. System.out.println(x++);//10 (11)  
  5. System.out.println(++x);//12  
  6. System.out.println(x--);//12 (11)  
  7. System.out.println(--x);//10  
  8. }}  

Output:

10
12
12
10

Java Unary Operator Example 2: ++ and --

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=10;  
  5. System.out.println(a++ + ++a);//10+12=22  
  6. System.out.println(b++ + b++);//10+11=21  
  7.   
  8. }}  

Output:

22
21

Java Unary Operator Example: ~ and !

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=-10;  
  5. boolean c=true;  
  6. boolean d=false;  
  7. System.out.println(~a);//-11 (minus of total positive value which starts from 0)  
  8. System.out.println(~b);//9 (positive of total minus, positive starts from 0)  
  9. System.out.println(!c);//false (opposite of boolean value)  
  10. System.out.println(!d);//true  
  11. }}  

Output:

-11
9
false
true

Java Arithmetic Operators

Java arithmetic operators are used to perform addition, subtraction, multiplication, and division. They act as basic mathematical operations.

Java Arithmetic Operator Example

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=5;  
  5. System.out.println(a+b);//15  
  6. System.out.println(a-b);//5  
  7. System.out.println(a*b);//50  
  8. System.out.println(a/b);//2  
  9. System.out.println(a%b);//0  
  10. }}  

Output:

15
5
50
2
0

Java Arithmetic Operator Example: Expression

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. System.out.println(10*10/5+3-1*4/2);  
  4. }}  

Output:

21

Java Left Shift Operator

The Java left shift operator << is used to shift all of the bits in a value to the left side of a specified number of times.

Java Left Shift Operator Example

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. System.out.println(10<<2);//10*2^2=10*4=40  
  4. System.out.println(10<<3);//10*2^3=10*8=80  
  5. System.out.println(20<<2);//20*2^2=20*4=80  
  6. System.out.println(15<<4);//15*2^4=15*16=240  
  7. }}  

Output:

40
80
80
240

Java Right Shift Operator

The Java right shift operator >> is used to move the value of the left operand to right by the number of bits specified by the right operand.

Java Right Shift Operator Example

  1. public OperatorExample{  
  2. public static void main(String args[]){  
  3. System.out.println(10>>2);//10/2^2=10/4=2  
  4. System.out.println(20>>2);//20/2^2=20/4=5  
  5. System.out.println(20>>3);//20/2^3=20/8=2  
  6. }}  

Output:

2
5
2

Java Shift Operator Example: >> vs >>>

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3.     //For positive number, >> and >>> works same  
  4.     System.out.println(20>>2);  
  5.     System.out.println(20>>>2);  
  6.     //For negative number, >>> changes parity bit (MSB) to 0  
  7.     System.out.println(-20>>2);  
  8.     System.out.println(-20>>>2);  
  9. }}  

Output:

5
5
-5
1073741819

Java AND Operator Example: Logical && and Bitwise &

The logical && operator doesn't check the second condition if the first condition is false. It checks the second condition only if the first one is true.

The bitwise & operator always checks both conditions whether first condition is true or false.

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=5;  
  5. int c=20;  
  6. System.out.println(a<b&&a<c);//false && true = false  
  7. System.out.println(a<b&a<c);//false & true = false  
  8. }}  

Output:

false
false

Java AND Operator Example: Logical && vs Bitwise &

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=5;  
  5. int c=20;  
  6. System.out.println(a<b&&a++<c);//false && true = false  
  7. System.out.println(a);//10 because second condition is not checked  
  8. System.out.println(a<b&a++<c);//false && true = false  
  9. System.out.println(a);//11 because second condition is checked  
  10. }}  

Output:

false
10
false
11

Java OR Operator Example: Logical || and Bitwise |

The logical || operator doesn't check the second condition if the first condition is true. It checks the second condition only if the first one is false.


The bitwise | operator always checks both conditions whether first condition is true or false.

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=5;  
  5. int c=20;  
  6. System.out.println(a>b||a<c);//true || true = true  
  7. System.out.println(a>b|a<c);//true | true = true  
  8. //|| vs |  
  9. System.out.println(a>b||a++<c);//true || true = true  
  10. System.out.println(a);//10 because second condition is not checked  
  11. System.out.println(a>b|a++<c);//true | true = true  
  12. System.out.println(a);//11 because second condition is checked  
  13. }}  

Output:

true
true
true
10
true
11

Java Ternary Operator

Java Ternary operator is used as one line replacement for if-then-else statement and used a lot in Java programming. It is the only conditional operator which takes three operands.

Java Ternary Operator Example

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=2;  
  4. int b=5;  
  5. int min=(a<b)?a:b;  
  6. System.out.println(min);  
  7. }}  

Output:

2

Another Example:

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=5;  
  5. int min=(a<b)?a:b;  
  6. System.out.println(min);  
  7. }}  

Output:

5

Java Assignment Operator

Java assignment operator is one of the most common operators. It is used to assign the value on its right to the operand on its left.

Java Assignment Operator Example

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. int a=10;  
  4. int b=20;  
  5. a+=4;//a=a+4 (a=10+4)  
  6. b-=4;//b=b-4 (b=20-4)  
  7. System.out.println(a);  
  8. System.out.println(b);  
  9. }}  

Output:

14
16

Java Assignment Operator Example

  1. public class OperatorExample{  
  2. public static void main(String[] args){  
  3. int a=10;  
  4. a+=3;//10+3  
  5. System.out.println(a);  
  6. a-=4;//13-4  
  7. System.out.println(a);  
  8. a*=2;//9*2  
  9. System.out.println(a);  
  10. a/=2;//18/2  
  11. System.out.println(a);  
  12. }}  

Output:

13
9
18
9

Java Assignment Operator Example: Adding short

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. short a=10;  
  4. short b=10;  
  5. //a+=b;//a=a+b internally so fine  
  6. a=a+b;//Compile time error because 10+10=20 now int  
  7. System.out.println(a);  
  8. }}  

Output:

Compile time error

After type cast:

  1. public class OperatorExample{  
  2. public static void main(String args[]){  
  3. short a=10;  
  4. short b=10;  
  5. a=(short)(a+b);//20 which is int now converted to short  
  6. System.out.println(a);  
  7. }}  

Output:

20

Comments

Post a Comment

Popular Topics

What is JSP. How to create one JSP application in Eclipse

Image
  JSP - Java Server Pages Technology   Java Server Pages (JSP) technology allows you to easily create web content that has both static and dynamic components. JSP technology makes available all the dynamic capabilities of Java Servlet technology but provides a more natural approach to creating static content. The main features of JSP technology are as follows: ·          A language for developing JSP pages, which are text-based documents that describe how to process a request and construct a response ·          An expression language for accessing server-side objects ·          Mechanisms for defining extensions to the JSP language JSP technology also contains an API that is used by developers of web containers. Using this technology developer can design UI for client (browser) as well as business logic for communicating server. A JSP file conta...
Read more

How to develop a RESTful webservice in java ?

Image
  How to create my first RESTful web service project in Eclipse ? 1)       To Create a web service project, open File menu à New à Dynamic Web Project 2)        2)        Type the name for your project as “MyFirstRESTful” and select dynamic web module version as 2.5 à Next à 3)        3)        Tick mark on “Generate web.xml deployment descriptor” à Finish   4)       4)     Expand your project and right click on webcontent folder à New  à   select JSP File option  à   Type the file name as  index.jsp   5)         5) Open index.jsp and type below code. index.jsp <%@ page language = "java" contentType = "text/html; charset=ISO-8859-1" pageEncoding = "ISO-8859-1" %> <! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitiona...
Read more

What is JDBC ?

Introduction JDBC stands for Java Database Connectivity. It is a Java API that defines how a Java program can connect and execute queries with a database. It is a part of the Java Standard Edition platform, from Oracle Corporation. JDBC API uses JDBC drivers to communicate with different types of databases. There are four types of JDBC drivers: JDBC-ODBC Bridge Driver, JDBC Native Driver, JDBC Network Protocol Driver, and JDBC Thin Driver The most commonly used type is the Thin Driver, which is database-specific and platform-independent The Statement interface is used to create SQL basic statements in Java it provides methods to execute queries with the database. There are different types of statements. Statement Prepared Statement Callable Statement For more details please read our next session. ....
Read more

Data Types in PL/SQL

  PL/SQL - Data Types In this chapter, we will discuss the Data Types in PL/SQL. The PL/SQL variables, constants and parameters must have a valid data type, which specifies a storage format, constraints, and a valid range of values. We will focus on the  SCALAR  and the  LOB  data types in this chapter. The other two data types will be covered in other chapters.   S.No Category & Description 1 Scalar Single values with no internal components, such as a  NUMBER, DATE,  or  BOOLEAN . 2 Large Object (LOB) Pointers to large objects that are stored separately from other data items, such as text, graphic images, video clips, and sound waveforms. 3 Composite Data items that have internal components that can be accessed individually. For example, collections and records. 4 Reference Pointers to other data items. ...
Read more

What is Hibernate in java ?

Image
Introduction to hibernate  Hibernate ORM is an object–relational mapping tool for the Java programming language. It provides a framework for mapping an object-oriented domain model to a relational database. Hibernate is a Java framework used for the development of Java application to interact with the database. It is an open source, lightweight, Object Relational Mapping tool. Hibernate implements the specifications of JPA (Java Persistence API) for data persistence.  Java Hibernate is an object-relational mapping tool allowing the mapping of object-oriented models to relational databases for  web applications  by providing a framework. Mapping of entities in a Java class to tables created in a database and mapping from Java data types to  SQL data types  is one of the primary functions of Hibernate. You can also retrieve data using Hibernate. It is the alternate for developer from manually handling the database using JDBC. Hibernate is an open-source objec...
Read more

If you have any query or suggestions, Please feel free to write us

Name

Email *

Message *