Java Core Essentials Notes
Ternary Operator and Switch Statements
● Ternary Operator: Conditional operator that evaluates a
boolean expression and returns one of two values.
● Switch Statements: Used for multi-way branching based on
the value of an expression.
Basic Data Types and Type Casting
● Byte, Int, Float, Double and Char: Primary data types in Java
for storing numbers and characters.
● Type Casting: Conversion of one data type to another in
Java.
Operators and Logical Operators
● Arithmetic operators: +, -, *, /, % for mathematical
operations.
● Logical Operators: && (AND), || (OR), ! (NOT) for combining
conditional statements.
Decision-Making Methods
● if-else, switch statements and loops are used for decision
making in Java.
Classes and Objects
● Classes define a blueprint for objects. Objects are instances
of classes.
Properties and Variables
● Variables are used to store data within classes. Properties
define characteristics of objects.
JVM Role
● JVM (Java Virtual Machine) is responsible for running Java
programs.
Constructor Methods
● Methods used for initializing objects.
, Conditional Statements
● Execute parts of a program based on conditions using if-
else, switch, etc.
Bool-Boolean Data Type
● Boolean data type for representing true or false values.
Compilation and Execution
● Java code is compiled into bytecode and then executed by
the JVM.
Numeric Literals
● Notation used for representing numbers in Java.
Platform Independence
● JVM and JRE ensure that Java code can run on any
platform.
Working with Data Types
● Understand how to work with primitive data types in Java.
Variable Declaration
● Declare variables to store data in Java.
Note:
● Content related to other topics has been omitted to focus
on Java Core Essentials.
Oracle JDK Setup
Evaluate Expression and Print Results
Ternary Operator
● Used to evaluate an expression and return one of two
values based on the evaluation result
● Syntax: variable = (expression) ? value1 :
value2;
Switch Statements and Loops
Ternary Operator and Switch Statements
● Ternary Operator: Conditional operator that evaluates a
boolean expression and returns one of two values.
● Switch Statements: Used for multi-way branching based on
the value of an expression.
Basic Data Types and Type Casting
● Byte, Int, Float, Double and Char: Primary data types in Java
for storing numbers and characters.
● Type Casting: Conversion of one data type to another in
Java.
Operators and Logical Operators
● Arithmetic operators: +, -, *, /, % for mathematical
operations.
● Logical Operators: && (AND), || (OR), ! (NOT) for combining
conditional statements.
Decision-Making Methods
● if-else, switch statements and loops are used for decision
making in Java.
Classes and Objects
● Classes define a blueprint for objects. Objects are instances
of classes.
Properties and Variables
● Variables are used to store data within classes. Properties
define characteristics of objects.
JVM Role
● JVM (Java Virtual Machine) is responsible for running Java
programs.
Constructor Methods
● Methods used for initializing objects.
, Conditional Statements
● Execute parts of a program based on conditions using if-
else, switch, etc.
Bool-Boolean Data Type
● Boolean data type for representing true or false values.
Compilation and Execution
● Java code is compiled into bytecode and then executed by
the JVM.
Numeric Literals
● Notation used for representing numbers in Java.
Platform Independence
● JVM and JRE ensure that Java code can run on any
platform.
Working with Data Types
● Understand how to work with primitive data types in Java.
Variable Declaration
● Declare variables to store data in Java.
Note:
● Content related to other topics has been omitted to focus
on Java Core Essentials.
Oracle JDK Setup
Evaluate Expression and Print Results
Ternary Operator
● Used to evaluate an expression and return one of two
values based on the evaluation result
● Syntax: variable = (expression) ? value1 :
value2;
Switch Statements and Loops
