SE 7 was released on 7 July 2011. Java SE 7 is the major release to the Java SE
platform, which came a long time after its previous release J2SE 6. It introduced many
enhancements to the Java language. Integral types can now be expressed
using the binary number system. Numerical literals can contain underscore
characters for better readability. We can use strings in switch
statements. A diamond operator is introduced in generics instance creation
syntax. A new try-with-resources statement has been added.
exception types may now be included in a single catch block. A new compiler
option and two annotations are added to give you improved compiler warnings and
errors when using nonrefillable formal parameters with var-args methods.
SE 7 introduced the NIO.2 API, which offers the ability to develop a custom file
system provider for managing file system objects. The new additions to this API
provide comprehensive support for file I/O and for accessing the file system.
The JDBC 4.1 API enables us to use try-with-resources syntax to
automatically close resources of type Connection, Resultset, and Statement.
Additions have been made to RowSet that enable us to create all
types of row sets supported by our JDBC driver.
SE 7 adds support for Stream Control Transmission Protocol (SCTP)
on Solaris and Sockets Direct Protocol (SDP), which is a wire protocol to
support stream connections over InfiniBand fabric. This, at the time of this
writing, was available for the Solaris and Linux platforms. We can now develop
and deploy Rich Internet Applications as applets or Java Web Start
Java SE platform now supports the implementation of dynamically typed
programming languages on the JVM; for this, a new instruction called invokedynamic
was added to the JVM. A light weight fork/join framework is now added to
the Concurrency API. On the client
side, Java SE 7 adds a next-generation cross-platform look and feel for Swing—called
Nimbus look-and-feel. Besides these, there are several other enhancements. For example,
the XML stack has been updated to support the most recent versions of XML processing,
binding, and Web Services APIs. The MBeans API is enhanced to add more
management functionality. In the Security and Cryptography API, a portable
implementation of the standard Elliptic Curve Cryptographic (ECC) algorithms
has been added. The Internationalization API is enhanced to support the 6.0
version of Unicode. The Locale class has been upgraded, and the handling of
locales has been upgraded to separate formatting locales from user interface