Describe about primitive and user define data types in java

1. Data Types

2. Data Types in Java
1. Primitive data types: The primitive data types include boolean, char,
byte, short, int, long, float and double.
2. Non-primitive/User Define data types: The non-primitive data types
include Classes, Interfaces, and Arrays.

3. Should Remember
1. Lower type summation with higher type return higher data type
2. Java allow underscore in number
3. Assigning Higher type in lower type variable is compilation error

4. Non-primitive Type
• Know as user define type.
• Also known as Reference type.

5. Reserved Words in java

6. Create User Define data type
• Use the class keyword
• Class name.
• Define class with property and method

7. Student Data Type
• Attributes
• Roll : int
• Name : String
• Registration Number : int
• Emain : String
• Behaviors
• Read
• write

8. Value Overflow

9. The var keyword
• Available from java 9
• Only for local variable
• Can’t use as method/constructor parameter
• Have to assign in declaration line