Java8 new feature-lambda expression-basic knowledge

A Lambda expression is an unnamed block of code (or an unnamed function) with a list of formal parameters and a
Body.

Lambda expressions in Java8 are different from C #, using the

eg

//Takes an int parameter and returns the parameter value incremented by 1(intx) x + 1//Takes parameters and returns their sum(intXintY)-X +y//Takes parameters and returns the maximum of the(intXintY) {     intmax = x > y?x:y; returnMax;}//Takes no parameters and returns void() { }//Takes No parameters and returns a string "OK"(), "OK"//Takes a String parameter and prints it on the standard output(String msg),{System.out.println (msg);}//Takes a parameter and prints it on the standard outputMSG-System.out.println (msg)//Takes a String parameter and returns its length(String str), Str.length ()

Let's look at a simple example

Adder.java

 Package Corejava2.lambda; @FunctionalInterface  Public Interface Adder {    double Add ( double n2);} 

Joiner.java

 Package Corejava2.lambda; @FunctionalInterface  Public Interface Joiner {    string join (string s1, string s2);}

Targettypetest.java

 PackageCorejava2.lambda; Public classTargettypetest { Public Static voidMain (string[] args) {//creates an Adder using a lambda expressionAdder Adder = (x, y) x +y; //creates a Joiner using a lambda expressionJoiner Joiner = (x, y) x +y; //Adds Doubles        DoubleSUM1 = Adder.add (10.34, 89.11); //Adds ints        Doublesum2 = Adder.add (10, 89); //Joins StringsString str = joiner.join ("Hello", "Lambda"); System.out.println ("SUM1 =" +sum1); System.out.println ("sum2 =" +sum2); System.out.println ("str =" +str); }}

Operation Result:
SUM1 = 99.45
sum2 = 99.0
str = Hello Lambda

Java8 new feature-lambda expression-basic knowledge