Java 8 lambda expression

Just after the spring Festival, come to work, feel a little tired, tired. The eyes can't adapt to staring at the screen for a long time. So summarize the new features of java8, lambda usage.

function interfaces, function sets, method references, interface default methods

Default method:

Java 8 allows me to specify the implementation of a default implementation for the interface itself.

Project, when already wrote a interface, many class implements this interface, this time need some default implementation method in interface,

Is the default method of fetching interface for class objects that do not implement these methods. This time can only change the interface to abstract, at this time too many changes.

Java 8 allows a default implementation method to be specified for the interface itself. Only the default keyword is required: public default int Getskill () {return 1000;}

is to add methods directly to the interface without destroying the existing implementation architecture.

Method References:

Java 8 lambda expression