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    <h2>Java SE 7 <a href="http://www.oracle.com/technetwork/java/javase/jdk7-relnotes-418459.html" rel="noreferrer">Features and Enhancements</a> from JDK 7 Release Notes</h2> <p>This is the Java 7 new features summary from the <a href="http://openjdk.java.net/projects/jdk7/features/" rel="noreferrer">OpenJDK 7 features page</a>:</p> <blockquote> <pre> 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] </pre> </blockquote> <h2>Code examples for new features in Java 1.7</h2> <h3>Try-with-resources statement</h3> <p>this:</p> <pre><code>BufferedReader br = new BufferedReader(new FileReader(path)); try { return br.readLine(); } finally { br.close(); } </code></pre> <p>becomes:</p> <pre><code>try (BufferedReader br = new BufferedReader(new FileReader(path)) { return br.readLine(); } </code></pre> <p>You can declare more than one resource to close:</p> <pre><code>try ( InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest)) { // code } </code></pre> <h3>Underscores in numeric literals</h3> <pre><code>int one_million = 1_000_000; </code></pre> <h3>Strings in switch</h3> <pre><code>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; } </code></pre> <h3>Binary literals</h3> <pre><code>int binary = 0b1001_1001; </code></pre> <h3>Improved Type Inference for Generic Instance Creation</h3> <pre><code>Map&lt;String, List&lt;String&gt;&gt; anagrams = new HashMap&lt;String, List&lt;String&gt;&gt;(); </code></pre> <p>becomes:</p> <pre><code>Map&lt;String, List&lt;String&gt;&gt; anagrams = new HashMap&lt;&gt;(); </code></pre> <h3>Multiple exception catching</h3> <p>this:</p> <pre><code>} catch (FirstException ex) { logger.error(ex); throw ex; } catch (SecondException ex) { logger.error(ex); throw ex; } </code></pre> <p>becomes:</p> <pre><code>} catch (FirstException | SecondException ex) { logger.error(ex); throw ex; } </code></pre> <h3>SafeVarargs</h3> <p>this:</p> <pre><code>@SuppressWarnings({"unchecked", "varargs"}) public static void printAll(List&lt;String&gt;... lists){ for(List&lt;String&gt; list : lists){ System.out.println(list); } } </code></pre> <p>becomes:</p> <pre><code>@SafeVarargs public static void printAll(List&lt;String&gt;... lists){ for(List&lt;String&gt; list : lists){ System.out.println(list); } } </code></pre>
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    1. PONew features in java 7
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    1. USYusuf K.
    1. USdidxga
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    1. CO+1 Code for the hard to find code examples. Can you add more?
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      1. USZasz
    2. COThe improved type inference seems to be a sad copy from C# with a weird change where a reference is typed, but the object is not?? What comedy!
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    3. CO@Zasz, yes sure, it is in continuous improvement
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