Java 7 Features:

1. Usage of Strings in Switch Statement
2. Diamond Operator – the diamond operator allows you to write more compact (and readable) code by saving repeated type arguments
3. Try with Resources
4. Multiple Exception Handling
5. Suppressed Exceptions
6. Allows Binay Literals – Binary Literal are expressing Integer Values in terms of Binary Value by adding the prefix 0b or 0B to the integral value.For more on BinayLiteral click here

Java 8 Features:

1. Lambda Expressions
2. Java Stream API for Bulk Data Operations on Collections.
3. Static and Default method in Functional Interfaces
4. forEach() method in Iterable interface
5. Functional Interfaces
6. Collection API improvements

Java 9 Features:

1. Factory Methods for Immutable List, Set, Map and Map.Entry
2. Private methods in Interfaces
3. Reactive Streams
4. JShell: the interactive Java REPL

Java 10 Features:

1. Local-Variable Type Inference
2. Application Class-Data Sharing
3. default set of root Certification Authority (CA) certificates in the JDK
4. Garbage Collector Interface

Java 11 Features:

1. Java 11 JDK is not free for usage on commercial purpose
2. No need to compile.typing >>Java in command prompt will compile and run java
3. Remove the Java EE and CORBA Modules –
4. Java String Methods – isBlank(), lines(), strip(), stripLeading(), stripTrailing()

Java 17 Features:

1. LTS support and licenses Java 17 LTS is the latest long-term support release for the Java SE platform
2. Pattern matching for the switch case
3. Sealed classes and interfaces. Sealed classes and interfaces restrict which other classes or interfaces may extend or implement them.

   sealed class Human permits Manish, Vartika, Anjali 
   {    
       public void printName() 
       { 
           System.out.println("Default"); 
       } 
   } 
   
   non-sealed class Manish extends Human 
   { 
       public void printName() 
       { 
           System.out.println("Manish Sharma"); 
       } 
   }