1.7 is the first pre-release for Java Edition 1.7.2, released on October 22, 2013.1 It adds acacia and dark slabs and stairs of the yet to be added wooden planks and retextures the tops of most wood blocks. 1 Additions 1.1 Blocks 2 Changes 2.1 Blocks 2.2 World generation 2.3 General 3 Fixes 4 Reupload 5 Trivia 6 References SlabsAcacia wood slabs Predates the addition of acacia planks.Dark. Free java 1.7 updates download software at UpdateStar - Java Platform, Standard Edition (Java SE) lets you develop and deploy Java applications on desktops and servers, as well as in today's demanding embedded environments.
‘Java latest changes’ or’ ‘Java 1.7 changes’ are covered in this topic. Java 1.7 [ Dolphin] is major update after java 1.5 tiger release. It is done on 2011-07-28 after around 5 years of java release 1.6 [Mustang]. These are major changes in java 1.7 release and most important is definitely ‘Auto closeable’ of resources.
1) Autocloseable Try Statement defining Resources – Java 1.7 introduces all new try-with-resources statement using which declaration and initialization of one or more resources can happen. But only the resources that implement the interface “java.lang.AutoCloseable” can be declared. Example:
try (BufferedReader bufferedReader = new BufferedReader( FileReader(path)))
Java (TM) 7 is a Freeware software in the category Audio & Multimedia developed by Sun Microsystems, Inc. The latest version of Java (TM) 7 is 1.7.0.0, released on. It was initially added to our database on. Java (TM) 7 runs on the following operating systems: Windows/Linux. Java Runtime Environment 1.7.0.10 (32-bit) Oracle - 29.99MB (Freeware) Java software allows you to run applications called 'applets' that are written in the Java programming language.
}
In this code snippet, sampleBufferedReader instance is created within the try statement. Note that the example does not include a finally block that contains a code to close sampleBufferedReader as in Java 1.6 or earlier versions. Java 1.7 automatically closes the resources that are instantiated within the try-with-resources statement as shown above.
2) Catch Block Handling Multiple Exceptions – In Java 1.5 and Java 1.6, a catch block can handle only one type of exception. But in Java 1.7 and later versions, a single catch block can handle multiple exceptions. Here is an example showing catch blocks in Java 1.6:
catch(SQLException exp1)
catch(IOException exp2)
The same code snippet can be modified in Java 1.7 as:
catch(SQLException | IOException |ArrayIndexOutofBoundsException exp1)
3) String Object as Expression in Switch Statement – So far only integral types are used as expressions in switch statement. But Java 1.7 permits usage of String object as a valid expression. Example:
case “CASE1”:
break;
4) JDBC in Java 1.7
JDBC contained in Java 1.7 / Java SE 7 is JDBC 4.1 that is newly getting introduced. JDBC 4.1 is more efficient when compared to JDBC 4.0.
5) Language Enhancements in JDBC 1.7
Integral Types as Binary Literals – In Java 1.7 / Java SE 7, the integral types namely byte, short, int and long can also be expressed with the binary number system. To specify these integral types as binary literals, add the prefix 0B or 0b to number. For example, here is a byte literal represented as 8-bit binary number:
Underscores Between Digits in Numeric Literal – In Java 1.7 and all later versions, “_” can be used in-between digits in any numeric literal. “_” can be used to group the digits similar to what “,” does when a bigger number is specified. But “_” can be specified only between digits and not in the beginning or end of the number. Example:
In this example, the switch expression contains a string called sampleString. The value of this string is matched with every case label and when the string content matches with case label then the corresponding case gets executed.
Automatic Type Inference during the Generic Instance Creation – In Java 1.7 while creating a generic instance, empty parameters namely <> can be specified instead of specifying the exact type arguments. However, this is permitted only in cases where the compiler can infer the appropriate type arguments. For example, in Java 1.7 you can specify:
Thus HashMap<> can be specified instead of HashMap>;. This <>; empty parameters of Java 1.7 are named as diamond operator.
6) Suppress Warnings – When declaring varargs method that includes parameterized types, if the body of the varargs method does not throw any exceptions like ClassCastException (which occurs due to improper handling of the varargs formal parameter) then the warnings can be suppressed in Java 1.7 by three different ways:
(1) Add annotation @SafeVarargs to static method declarations and non constructor method declarations
(2) Add annotation @SuppressWarnings({“unchecked”, “varargs”}) to varargs method declaration
By suppressing the warnings in varargs method, occurrence of unchecked warnings can be prevented at compile time thus preventing Heap Pollution.
7) Java Virtual Machine Enhancements in Java 1.7
Java SE 7 / Java 1.7 newly introduce a JVM instruction called “invokedynamic” instruction. Using “invokedynamic” instruction, the dynamic types programming language implementation becomes simpler. Thus Java 1.7 enables JVM support for the non-java languages.
1. Overview
When it comes to SSL connections, we should be using TLSv1.2. Indeed, it's the default SSL protocol for Java 8.
And while Java 7 supports TLSv1.2, the default is TLS v1.0, which is too weak these days.
In this tutorial, we'll discuss various options to configure Java 7 to use TLSv1.2.
2. Using Java VM Arguments
If we are using Java 1.7.0_95 or later, we can add the jdk.tls.client.protocols property as a java command-line argument to support TLSv1.2:
But Java 1.7.0_95 is available only to the customers who purchased support from Oracle. So, we'll review other options below to enable TLSv1.2 on Java 7.
3. Using SSLSocket
In this first example, we'll enable TLSv1.2 using SSLSocketFactory.
First, we can create a default SSLSocketFactory object by calling the SSLSocketFactory#getDefault factory method.
Then, we simply pass our host and port to SSLSocket#createSocket:
The default SSLSocket created above doesn't have any SSL protocols associated with it. We can associate the SSL protocols to our SSLSocket in a couple of ways.
In the first approach, we can pass an array of supported SSL protocols to the setEnabledProtocols method on our SSLSocket instance:
Alternatively, we can use SSLParameters, using the same array:
4. Using SSLContext
Setting the SSLSocket directly changes only the one connection. We can use SSLContext to change the way we create the SSLSocketFactory.
So, instead of using SSLSocketFactory#getInstance, let's do SSLContext#getInstance, giving it “TLSv1.2” as a parameter.We can just get our SSLSocketFactory from that now:
As a quick side note, always remember to use SecureRandom when working with SSL.
5. Using HttpsURLConnection
Of course, we aren't always creating sockets directly. Oftentimes, we are at the application protocol level.
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So, finally, let's see how to enable TLSv1.2 on HttpsURLConnection.
First, we'll need an instance of URL. Let's imagine that we are connecting to https://example.org:
Now, we can set up our SSLContext as before:
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Then, our last steps are to create the connection and supply it with an SSLSocketFactory:
6. Conclusion
In this quick article, we showed a few ways to enable TLSv1.2 on Java 7.
The code samples used in this article are available over on GitHub.
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