New features of Java7 and JAVA8

To go down to the website:

http://blog.csdn.net/samjustin1/article/details/52268004

Java7 new Features

You can use a string in 1.switch

String s = "Test";   Switch (s) {case   "test":   System.out.println ("test");   Case "Test1":   System.out.println ("test1");   break;   Default:   System.out.println ("break");   break;   }

2. Using list<string> templist = new arraylist<> (); Generic instantiation type auto-inference

3. The collection is syntactically supported, not necessarily an array

Final list<integer> List = [1,2,3,4,5,6]

4. New tools to access environmental information

    File System.getjavaiotempdir ()//IO Temp folder      file System.getjavahomedir ()//JRE installation directory      file System.getuserhomedir ()///Current User directory      File system.getuserdir ()//directory where the Java process was started 5  

5,6,7 ...

Java8 new Features

1.Java 8 allows us to add a non-abstract method implementation to the interface, only need to use the default keyword, this feature is also called the extension method, the example is as follows:

Interface Formula {      double calculate (int a);         Default double sqrt (int a) {          return math.sqrt (a);      }  

2.LAMBDA-expression

3. Function-Type interface

New features of Java7 and JAVA8