New features in java 7

Question

What new features in java 7 is going to be implemented  And what are they doing now

User · Answer

The following list contains links to the the enhancements pages in the Java SE 7.

Swing
IO and New IO
Networking
Security
Concurrency Utilities
Rich Internet Applications (RIA)/Deployment
    Requesting and Customizing Applet Decoration in Dragg able Applets
    Embedding JNLP File in Applet Tag
    Deploying without Codebase
    Handling Applet Initialization Status with Event Handlers
Java 2D
Java XML – JAXP, JAXB, and JAX-WS
Internationalization
java.lang Package
    Multithreaded Custom Class Loaders in Java SE 7
Java Programming Language
    Binary Literals
    Strings in switch Statements
    The try-with-resources Statement
    Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking
    Underscores in Numeric Literals
    Type Inference for Generic Instance Creation
    Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods
Java Virtual Machine (JVM)
    Java Virtual Machine Support for Non-Java Languages
    Garbage-First Collector
    Java HotSpot Virtual Machine Performance Enhancements
JDBC

Reference 1 Reference 2

User · Answer

Language changes   -Project Coin  small changes  -switch on Strings -try-with-resources -diamond operator   Library changes   -new abstracted file-system API  NIO 2   with support for virtual filesystems  -improved concurrency libraries -elliptic curve encryption -more incremental upgrades   Platform changes   -support for dynamic languages   Below is the link explaining the newly added features of JAVA 7   the explanation is crystal clear with the possible small examples for each features    http   radar oreilly com 2011 09 java7-features html

User · Answer

The following list contains links to the the enhancements pages in the Java SE 7.

Swing
IO and New IO
Networking
Security
Concurrency Utilities
Rich Internet Applications (RIA)/Deployment
    Requesting and Customizing Applet Decoration in Dragg able Applets
    Embedding JNLP File in Applet Tag
    Deploying without Codebase
    Handling Applet Initialization Status with Event Handlers
Java 2D
Java XML – JAXP, JAXB, and JAX-WS
Internationalization
java.lang Package
    Multithreaded Custom Class Loaders in Java SE 7
Java Programming Language
    Binary Literals
    Strings in switch Statements
    The try-with-resources Statement
    Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking
    Underscores in Numeric Literals
    Type Inference for Generic Instance Creation
    Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods
Java Virtual Machine (JVM)
    Java Virtual Machine Support for Non-Java Languages
    Garbage-First Collector
    Java HotSpot Virtual Machine Performance Enhancements
JDBC

Reference 1 Reference 2

User · Answer

In addition to what John Skeet said  here s an overview of the Java 7 project  It includes a list and description of the features   Note  JDK 7 was released on July 28  2011  so you should now go to the official java SE site

User · Answer

Java Programming Language Enhancements   Java7      Binary Literals Strings in switch Statement Try with Resources or ARM  Automatic Resource Management  Multiple Exception Handling Suppressed Exceptions underscore in literals Type Inference for Generic Instance Creation using Diamond Syntax Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods   Official reference Official reference with java8 wiki reference

User · Answer

Java Programming Language Enhancements   Java7      Binary Literals Strings in switch Statement Try with Resources or ARM  Automatic Resource Management  Multiple Exception Handling Suppressed Exceptions underscore in literals Type Inference for Generic Instance Creation using Diamond Syntax Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods   Official reference Official reference with java8 wiki reference

User · Answer

Using Diamond  lt    operator for generic instance creation   Map lt String  List lt Trade gt  gt  trades   new TreeMap  lt  gt           Using strings in switch statements   String status      something        switch statue        case1        case2        default             Underscore in numeric literals   int val 12 15  long phoneNo   01917 999 720L      Using single catch statement for throwing multiple exception by using         operator   catch IOException   NullPointerException ex             ex printStackTrace                  No need to close   resources because Java 7 provides try-with-resources statement   try FileOutputStream fos   new FileOutputStream  movies txt          DataOutputStream dos   new DataOutputStream fos                   dos writeUTF  Java 7 Block Buster        catch IOException e               log the exception          binary literals with prefix    0b    or    0B

User · Answer

Java SE 7 Features and Enhancements from JDK 7 Release Notes  This is the Java 7 new features summary from the OpenJDK 7 features page     vm  JSR 292  Support for dynamically-typed languages  InvokeDynamic          Strict class-file checking lang    JSR 334  Small language enhancements  Project Coin  core    Upgrade class-loader architecture         Method to close a URLClassLoader         Concurrency and collections updates  jsr166y  i18n    Unicode 6 0         Locale enhancement         Separate user locale and user-interface locale ionet   JSR 203  More new I O APIs for the Java platform  NIO 2          NIO 2 filesystem provider for zip jar archives         SCTP  Stream Control Transmission Protocol          SDP  Sockets Direct Protocol          Use the Windows Vista IPv6 stack         TLS 1 2 sec     Elliptic-curve cryptography  ECC  jdbc    JDBC 4 1 client  XRender pipeline for Java 2D         Create new platform APIs for 6u10 graphics features         Nimbus look-and-feel for Swing         Swing JLayer component         Gervill sound synthesizer  NEW  web     Update the XML stack mgmt    Enhanced MBeans  UPDATED     Code examples for new features in Java 1 7  Try-with-resources statement  this   BufferedReader br   new BufferedReader new FileReader path    try      return br readLine      finally      br close        becomes   try  BufferedReader br   new BufferedReader new FileReader path        return br readLine        You can declare more than one resource to close   try      InputStream in   new FileInputStream src      OutputStream out   new FileOutputStream dest         code     Underscores in numeric literals  int one million   1 000 000    Strings in switch  String s       switch s     case  quux       processQuux s          fall-through    case  foo     case  bar       processFooOrBar s       break     case  baz        processBaz s          fall-through    default      processDefault s       break      Binary literals  int binary   0b1001 1001    Improved Type Inference for Generic Instance Creation  Map lt String  List lt String gt  gt  anagrams   new HashMap lt String  List lt String gt  gt       becomes   Map lt String  List lt String gt  gt  anagrams   new HashMap lt  gt       Multiple exception catching  this     catch  FirstException ex         logger error ex        throw ex    catch  SecondException ex         logger error ex        throw ex      becomes     catch  FirstException   SecondException ex         logger error ex       throw ex      SafeVarargs  this    SuppressWarnings   unchecked    varargs    public static void printAll List lt String gt     lists       for List lt String gt  list   lists           System out println list             becomes    SafeVarargs public static void printAll List lt String gt     lists       for List lt String gt  list   lists           System out println list

User · Answer

In addition to what John Skeet said  here s an overview of the Java 7 project  It includes a list and description of the features   Note  JDK 7 was released on July 28  2011  so you should now go to the official java SE site

User · Answer

Language changes   -Project Coin  small changes  -switch on Strings -try-with-resources -diamond operator   Library changes   -new abstracted file-system API  NIO 2   with support for virtual filesystems  -improved concurrency libraries -elliptic curve encryption -more incremental upgrades   Platform changes   -support for dynamic languages   Below is the link explaining the newly added features of JAVA 7   the explanation is crystal clear with the possible small examples for each features    http   radar oreilly com 2011 09 java7-features html

User · Answer

Using Diamond  lt    operator for generic instance creation   Map lt String  List lt Trade gt  gt  trades   new TreeMap  lt  gt           Using strings in switch statements   String status      something        switch statue        case1        case2        default             Underscore in numeric literals   int val 12 15  long phoneNo   01917 999 720L      Using single catch statement for throwing multiple exception by using         operator   catch IOException   NullPointerException ex             ex printStackTrace                  No need to close   resources because Java 7 provides try-with-resources statement   try FileOutputStream fos   new FileOutputStream  movies txt          DataOutputStream dos   new DataOutputStream fos                   dos writeUTF  Java 7 Block Buster        catch IOException e               log the exception          binary literals with prefix    0b    or    0B

User · Answer

New Feature of Java Standard Edition  JSE 7    Decorate Components with the JLayer Class    The JLayer class is a flexible and powerful decorator for Swing components  The JLayer class in Java SE 7 is similar in spirit to the JxLayer project project at java net  The JLayer class was initially based on the JXLayer project  but its API evolved separately  Strings in switch Statement   In the JDK 7   we can use a String object in the expression of a switch statement  The Java compiler generates generally more efficient bytecode from switch statements that use String objects than from chained if-then-else statements  Type Inference for Generic Instance    We can replace the type arguments required to invoke the constructor of a generic class with an empty set of type parameters   lt    as long as the compiler can infer the type arguments from the context  This pair of angle brackets is informally called the diamond  Java SE 7 supports limited type inference for generic instance creation  you can only use type inference if the parameterized type of the constructor is obvious from the context  For example  the following example does not compile   List lt String gt  l   new ArrayList lt  gt     l add  A    l addAll new ArrayList lt  gt        In comparison  the following example compiles   List lt   extends String gt  list2   new ArrayList lt  gt     l addAll list2    Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking    In Java SE 7 and later  a single catch block can handle more than one type of exception  This feature can reduce code duplication  Consider the following code  which contains duplicate code in each of the catch blocks   catch  IOException e        logger log e       throw e    catch  SQLException e        logger log e       throw e      In releases prior to Java SE 7  it is difficult to create a common method to eliminate the duplicated code because the variable e has different types  The following example  which is valid in Java SE 7 and later  eliminates the duplicated code   catch  IOException SQLException e        logger log e       throw e      The catch clause specifies the types of exceptions that the block can handle  and each exception type is separated with a vertical bar      The java nio file package  The java nio file package and its related package  java nio file attribute  provide comprehensive support for file I O and for accessing the file system  A zip file system provider is also available in JDK 7    Source  http   ohmjavaclasses blogspot com

User · Answer

I think  ForkJoinPool and related enhancement to Executor Framework is an important addition in Java 7

User · Answer

New Feature of Java Standard Edition  JSE 7    Decorate Components with the JLayer Class    The JLayer class is a flexible and powerful decorator for Swing components  The JLayer class in Java SE 7 is similar in spirit to the JxLayer project project at java net  The JLayer class was initially based on the JXLayer project  but its API evolved separately  Strings in switch Statement   In the JDK 7   we can use a String object in the expression of a switch statement  The Java compiler generates generally more efficient bytecode from switch statements that use String objects than from chained if-then-else statements  Type Inference for Generic Instance    We can replace the type arguments required to invoke the constructor of a generic class with an empty set of type parameters   lt    as long as the compiler can infer the type arguments from the context  This pair of angle brackets is informally called the diamond  Java SE 7 supports limited type inference for generic instance creation  you can only use type inference if the parameterized type of the constructor is obvious from the context  For example  the following example does not compile   List lt String gt  l   new ArrayList lt  gt     l add  A    l addAll new ArrayList lt  gt        In comparison  the following example compiles   List lt   extends String gt  list2   new ArrayList lt  gt     l addAll list2    Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking    In Java SE 7 and later  a single catch block can handle more than one type of exception  This feature can reduce code duplication  Consider the following code  which contains duplicate code in each of the catch blocks   catch  IOException e        logger log e       throw e    catch  SQLException e        logger log e       throw e      In releases prior to Java SE 7  it is difficult to create a common method to eliminate the duplicated code because the variable e has different types  The following example  which is valid in Java SE 7 and later  eliminates the duplicated code   catch  IOException SQLException e        logger log e       throw e      The catch clause specifies the types of exceptions that the block can handle  and each exception type is separated with a vertical bar      The java nio file package  The java nio file package and its related package  java nio file attribute  provide comprehensive support for file I O and for accessing the file system  A zip file system provider is also available in JDK 7    Source  http   ohmjavaclasses blogspot com

User · Answer

Java SE 7 Features and Enhancements from JDK 7 Release Notes  This is the Java 7 new features summary from the OpenJDK 7 features page     vm  JSR 292  Support for dynamically-typed languages  InvokeDynamic          Strict class-file checking lang    JSR 334  Small language enhancements  Project Coin  core    Upgrade class-loader architecture         Method to close a URLClassLoader         Concurrency and collections updates  jsr166y  i18n    Unicode 6 0         Locale enhancement         Separate user locale and user-interface locale ionet   JSR 203  More new I O APIs for the Java platform  NIO 2          NIO 2 filesystem provider for zip jar archives         SCTP  Stream Control Transmission Protocol          SDP  Sockets Direct Protocol          Use the Windows Vista IPv6 stack         TLS 1 2 sec     Elliptic-curve cryptography  ECC  jdbc    JDBC 4 1 client  XRender pipeline for Java 2D         Create new platform APIs for 6u10 graphics features         Nimbus look-and-feel for Swing         Swing JLayer component         Gervill sound synthesizer  NEW  web     Update the XML stack mgmt    Enhanced MBeans  UPDATED     Code examples for new features in Java 1 7  Try-with-resources statement  this   BufferedReader br   new BufferedReader new FileReader path    try      return br readLine      finally      br close        becomes   try  BufferedReader br   new BufferedReader new FileReader path        return br readLine        You can declare more than one resource to close   try      InputStream in   new FileInputStream src      OutputStream out   new FileOutputStream dest         code     Underscores in numeric literals  int one million   1 000 000    Strings in switch  String s       switch s     case  quux       processQuux s          fall-through    case  foo     case  bar       processFooOrBar s       break     case  baz        processBaz s          fall-through    default      processDefault s       break      Binary literals  int binary   0b1001 1001    Improved Type Inference for Generic Instance Creation  Map lt String  List lt String gt  gt  anagrams   new HashMap lt String  List lt String gt  gt       becomes   Map lt String  List lt String gt  gt  anagrams   new HashMap lt  gt       Multiple exception catching  this     catch  FirstException ex         logger error ex        throw ex    catch  SecondException ex         logger error ex        throw ex      becomes     catch  FirstException   SecondException ex         logger error ex       throw ex      SafeVarargs  this    SuppressWarnings   unchecked    varargs    public static void printAll List lt String gt     lists       for List lt String gt  list   lists           System out println list             becomes    SafeVarargs public static void printAll List lt String gt     lists       for List lt String gt  list   lists           System out println list

User · Answer

In addition to what John Skeet said  here s an overview of the Java 7 project  It includes a list and description of the features   Note  JDK 7 was released on July 28  2011  so you should now go to the official java SE site

User · Answer

In addition to what John Skeet said  here s an overview of the Java 7 project  It includes a list and description of the features   Note  JDK 7 was released on July 28  2011  so you should now go to the official java SE site

User · Answer

I think  ForkJoinPool and related enhancement to Executor Framework is an important addition in Java 7

[java-7] New features in java 7

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