Lamda表达式使用

 public class Lambda {

     public static void main(String[] args) {

         Lambda lambda=new Lambda();
         String something="oop print somthing";
         String something1="oop print something2";
         String something2="lambda print something";

         lambda.printSomething(something);

         Printer printer=new Printer(){
             @Override
             public void print(String something){
                 System.out.println(something);
             }
         };
         //use lammbda expression
　　　　　　　//lambda表达式的使用形式是（arg1，arg2,...）->{  代码块}
　　　　　　　　//和上面利用构造函数构造接口实现对象的作用是一样的。但是看起来更加简洁。
         Printer printer1= something3->System.out.println(something3);

         lambda.printSomething(something1, printer);
         lambda.printSomething(something2, printer1);

     }
     /*
      *
      */
     public void printSomething(String something){
         System.out.println(something);

     }
     public void printSomething(String something,Printer printer) {
         printer.print(something);

     }
 }

 /*
  * function interface
　　*这里申明一个函数式接口：只有一个函数的接口
　　*Lambda 表达式引入的目标是：Lambda表达式原被定义为一个函数式接口的内联实现。
  */
 interface Printer{
     public void print(String something);

 }

　　lambda能够写出更加紧凑的代码，便于阅读和跟踪。在性能和多核处理方法上也具有不少好处，详细需要了解stream API.

public class Lambda {
public static void main(String[] args) {
Lambda lambda=new Lambda();String something="oop print somthing";String something1="oop print something2";String something2="lambda print something";
lambda.printSomething(something);Printer printer=new Printer(){@Overridepublic void print(String something){System.out.println(something);}};//use lammbda expressionPrinter printer1= something3->System.out.println(something3);
lambda.printSomething(something1, printer);lambda.printSomething(something2, printer1);}/* *  */public void printSomething(String something){System.out.println(something);}public void printSomething(String something,Printer printer) {printer.print(something);}}
/* * function interface */interface Printer{public void print(String something);}