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Java Operators with Real Life Examples

This post will provide real life examples how to use operators in Java.

Write a Java program to convert Fahrenheit into Celsius.
Write a Java program to convert Celsius into Fahrenheit.
Write a Java program to print the area and perimeter of a circle.
Write a Java program to print the area and perimeter of a rectangle.
Write a Java program to print the area and perimeter of a square.

TaggedJava Operators with Real Life Examples

Java Tutorial

Basic Java

Installation

Install Java on Windows Install Eclipse to Run Java

Variables & DataTypes

Variables & Data Types Type Casting Convert String to Other Data Types Convert Primitive Data Type to String Assign Keyboard Input to Variables Real Life Examples

Operators

Arithmetic Operators Unary Operators Relational Operators Logical Operators Assignment Operators Real Life Examples

Control Flow Statements

If If-Else If-ElseIf-Else Nested If Switch Ternary Operator Real Life Examples

Loops

For Loop While Loop Do-While Loop For-Each Loop Nested Loops Break and Continue Real Life Examples

Methods

Declare Method Method Parameters Method Overloading Method Return Type Real Life Examples

Arrays

Declare and Initialize Array Multidimensional Arrays Real Life Examples

Strings

Declare String String charAt() Method String compareTo() Method String concat() Method String contains() Method String endsWith() Method String equals() Method String equalsIgnoreCase() Method String format() Method String getBytes() Method String indexOf() Method String isEmpty() Method String join() Method String lastIndexOf() Method String length() Method String replace() Method String replaceAll() Method String split() Method String startsWith() Method String substring() Method String toLowerCase() Method String toUpperCase() Method String trim() Method String valueOf() Method Real Life Examples

Exceptions

Try Catch Block Finally Block Nested Try Catch Block Throw Keyword Throws Keyword Custom Exception Real Life Examples

Intermediate Java

Object Oriented Programming (OOPs)

Classes and Objects Constructors Inheritance Abstract Class Polymorphism Interfaces Nested Classes Declare and Initialize Array of Objects Real Life Examples

Date and Time

Declare Date and Time Date Format Calendar Java 8 Date Time Real Life Examples

Collections

List Set Map Iterator Real Life Examples

File Input Output

File Operations Directory Operations Real Life Examples

Input Output Streams

OutputStream InputStream Real Life Examples

Advanced Java

Lambda Expressions

Use forEach Method Filter Collection in Stream Use Like Operator Use Sort Operator Use Limit Operator Find the First Element in Stream Use Sum Operator Use Count Operator Use Min Operator Use Max Operator Use Average Operator Use Group By Operator Real Life Examples

Regular Expressions

Common Matching Symbols Meta Characters Quantifier Grouping and Back Reference Negative Look Ahead Specifying Modes Inside Regular Expression Backslashes Real Life Examples

Annotation

Declare Custom Annotation Class Level Annotation Field Level Annotation Method Level Annotation Single-Value Annotation Multi-Value Annotation Real Life Examples

MultiThreading

Thread Class Runnable Interface Thread Sleep Thread Join Thread States Wait Method Notify Method NotifyAll Method Safety and Synchronization Exception in Thread Main Safety in Singleton Class Daemon Thread Thread Pool Callable Future Timer Thread Thread Deadlock FutureTask Real Life Examples

Generics

Generic Classes Generic Interfaces Generic Methods Generic Types Bounded Type Parameters Inheritance Wildcard Real Life Examples

Reflection

Reflection of Classes Reflection of Fields Reflection of Methods Reflection of Constructors Reflection of Annotations Invoke Method Invoke Method with Parameters Real Life Examples

Internationalization

Use Locale Class Percentages Formatting Long Numbers Formatting Numbers Formatting Money Formatting Symbols and Currencies Date Formatting Getting Messages from Resource Bundles Real Life Examples

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