Java 8 adds Lots of new features in major release. The
first time I heard about lambda expressions in Java. This
document summarizes features and enhancements in Java SE 8 and in JDK 8,
Oracle's implementation of Java SE 8.
Main Features:
1)
Lambda Expressions & Virtual Extension Methods
2)
Reduce Cache Contention on Specified Fields
3)
Remove the Permanent Generation
4)
Retire Some Rarely-Used GC Combinations
5)
Small VM
6)
Launch JavaFX Applications
7)
Generalized Target-Type Inference
8)
Annotations on Java Types
9)
Parallel Array Sorting
10)
Date & Time API
11)
JDBC 4.2
12)
Unicode 6.2
13)
Stronger Algorithms for Password-Based Encryption
1]Lambda
Expressions & Virtual Extension Methods:-
Add lambda expressions (closures) and supporting features,
including method references, enhanced type inference, and virtual extension
methods, to the Java programming language and platform.
They enable you to treat functionality as a
method argument, or code as data. Lambda expressions let you express instances
of single-method interfaces (referred to as functional interfaces) more
compactly.
(int x, int y) -> x + y
() -> System.out.println(this)
(String str) -> System.out.println(str)
str -> System.out.println(str)
(String s1, String s2) -> { return s2.length() - s1.length(); }
(s1, s2) -> s2.length() - s1.length()
2] Reduce Cache
Contention on Specified Fields:-
Define a way to specify that one or more fields in an object are
likely to be highly contended across processor cores so that the VM can arrange
for them not to share cache lines with other fields, or other objects, that are
likely to be independently accessed.
3]
Remove the Permanent Generation:-
Remove the permanent generation from the Hotspot JVM and thus the
need to tune the size of the permanent generation.
4] Retire Some
Rarely-Used GC Combinations:-
Remove three rarely-used combinations of garbage collectors in
order to reduce ongoing development, maintenance, and testing costs.
5] Small VM:-
Support the creation of a small VM that is no larger than 3MB.
6] Launch JavaFX
Applications:-
Enhance the
java command-line
launcher to launch JavaFX applications.
7] Generalized
Target-Type Inference:-
Smoothly expand the scope of method type-inference to support
(i)inference in method context
and (ii) inference in chained calls.
8] Annotations on
Java Types:-
Extend the set of annotatable locations in the syntax of the Java
programming language to include names which indicate the use of a type as well
as (per Java SE 5.0) the declaration of a type.
9] Parallel Array
Sorting:-
Add additional utility methods to
java.util.Arrays that
use the JSR 166 Fork/Join parallelism common pool to provide sorting of arrays
in parallel.
10] Date &
Time API:-
Define a new date, time, and calendar API for the Java SE platform.
11] JDBC 4.2:-
Changes under consideration for JDBC 4.2 include:
§ Add a
generic setter/update method to
ResultSet, PreparedStatement, and CallableStatement to support new data types such as those
being defined in JSR 310.
§ Define
REF_CURSOR support for CallableStatement.
§ Specify
required
DataSource properties for a Java EE environment.
§ Enhance
DatabaseMetaData.getIndexInfo to provide new columns forCARDINALITY and PAGES which return a long value.
§ Add a
new
DatabaseMeta method to return the logical maximum size
for a LOB.
§ Additional
clean up of the spec as needed.
12] Unicode 6.2:-
The following were the
primary changes in Unicode 6.1.0:
- add 11 new blocks to java.lang.Character.UnicodeBlock,
- add 7 new scripts to java.lang.Character.UnicodeScript, and
- support over 700 new characters in j.l.Character, String, and other classes.
13]
Stronger Algorithms for Password-Based Encryption:-
Provide stronger Password-Based-Encryption (PBE) algorithm implementations
in the SunJCE provider.
This is only summary of Main Features and we will discuss details
in my Next Post. If you want more information about Java8 then goto JAVA8 Official Site.
