In this session, we will cover Java basics. To learn selenium it is very important to learn Java. Without Java, you can not learn Selenium. Although many other languages are available that are supported by Selenium Selenium with Java is the best combination. 90% of companies use this combination. If you have manual testing the background then these videos are very helpful for you to learn Java basics, not advanced Java. To learn Selenium only core Java basics are required not advanced Java. We will cover the following topics:
Lecture 1 Agenda:
- What is Java
- What is Eclipse
- Data types in Java
- What is System.out.println()
and System.out.print()
1) What is Java?
- A computer programming language.
- Open source technology (License
free)
- No paid license required
- A high-level of language
- Pure object-oriented programming language
- Developed by Sun Microsystems
- OS/Platform independent
2) What is Eclipse?
- IDE(Integrated Development
Environment)/Editor
- Open source, free to use
- Used for Java development
- Although we can use it for other
languages
- But purely used for Java
- Flexible for Plugins (Junit,
TestNG, Maven)
- Easy to use and very user
friendly
3) Data Types
- How you are representing your
data
- Int, String, Character, Boolean,
Double, Long
Integer
int
I
= 10;
int
j
= 30;
int
l
= -1;
int
k
= 40;
- Duplicate variables are not
allowed
- The variable should be unique
- Every statement should be ended
with semicolon
Double
double
d1
= 24.7;
double
d2 =
44.56;
double
d3
= 100;
Character
- character is an only single-digit
value
- Should be written in single
quotes
char
c
= 'a';
char
d
= 'b';
Boolean
boolean
b1
= true;
boolean
b2
= false;
String
- The string is a class, not a data
type
- But can be used as a data type
- String s = “Hello world”;
- It is always written in double
quotes
String
s1
= "Selenium";
String
s2
= "Java Test code";
String
s3
= "100";
String
s4
= "12.33";
- Primitive data types (int, char,
boolean, double)
- Warnings are shown when a variable is declared but not used
What is System.out.println() and System.out.print()
- println() method prints the
output and moves the cursor to a new line.
- Each output will be printed on a new line
- print() method prints the all
output in one line
