Overview of Java for Selenium WebDriver

 

Data Types in Java:

  • Integer
  • Short
  • Long
  • Character
  • String
  • Float
  • Boolean

 

Java Modifiers for Classes, Variables, and Methods:

  • Access Modifiers : (Default, Public, Private and Protected).
  • Non Access Modifiers : (Static, Final, Abstract, Synchronized etc…).

 

Type of Variables in Java:

  1. Local Variables.
  2. Instance variables.
  3. Class / Static Variables.

 

Operators in Java:

  • Arithmetic Operators.
  • Relational Operators.
  • Bitwise Operators.
  • Logical Operators.
  • Assignment Operators

 

Conditional Statements:

  • If Statement.
  • Switch Statement.

 

Usage of Conditional Statements:

  • The statement is correct when executing a block of statements.
  • When the condition is correct, then execute a block of statements, otherwise execute one more block of statements.
  • Choose from several alternative options, for e.g: Else IF.
  • Execution of a block of statements when more than one condition is true e.g: nested If.
  • Choose from several alternative options e.g: Switch statement.

 

Loop Statements:

  • For loop.
  • While loop.
  • Do While loop.

 

Arrays in Java:

  • Generally, the array is a collection of elements of the same type.
  • In Java, Array is an object that contains elements of the same data type.
  • The Java array index is based, index starts with zero.
  • The length of the array is set when the array is created and the length of the array is fixed.
  • Each item in an array is called element.

 

Exception handling In Java:

  • An exception is a program that occurs during the execution of a program which disturbs the normal flow of instructions.
  • Exception in Java is a powerful mechanism for handling run-time errors in order to maintain the normal flow of the program.

 

Java Object Oriented programming System (OOPS) concepts:

  • Inheritance
  • Polymorphism
  • Abstraction
  • Encapsulation