Java 8 to 21 features:

Stream API:

Java 8 introduced the stream API which provides a functional

approach to processing sequence of elements.

Optional Class:It helps us to deal with NullPointerException.

Advantages:

i)Null checks are not required.

ii)No more NullPointerException at run time.

iii)No more boilerplate code.

Java 10: Var -> it is used for local variable type inference.

var number=10;

var name="John";

var price=10.5;

int a;

a=10;

var a=10;

var x=null; x

var a=10;

a="hello";

allowed : local variables, loop variable, enhanced for loop

not allowed: class fields, return types, method parameters.

Java 15: Text blocks(""")

String st="{\n "+

"\"name\"+

"\age\"+

}";

String st="""

""" ;

Records: java 16

I18N:

i)Locale class: It represents a specific georgaphical or cultural region.

ii)ResourceBundle class: It is used to store locale-specific resources.

a)Messages b)Labels c)Error texts d)Menu names