java 8 lambda

Java LAMDBA Learning 1. ObjectiveWhen I recently opened a project, I always felt a lot of time with code redundancy, so I'm going to study lamdba to make the code look more brief.2. Explore LambdaThe most classic is the collection sort Import java.util.arraylist;import Java.util.collections;import Java.util.list;public class Main {public St atic void Main (string[] args) {list The parentheses can be omitted when the

//arrays.sort (dogs, (Dog m,dog N)->integer.compare (M.getweight (), N.getweight ())),//lambda method two Printdogs (dogs); Method three stream After reading it is not very excited. Here are a few more examples of how the parameter is implemented: Import java.util.arrays;/** * * @author Kangjun */public class Standardsyntaxlambda { private static final string[] Ar r = {"program", "Creek", "is", "a", "

Have a nice smileAsk questionsHow does a Java lambda expression and stream work???solve the problemThe syntax of a lambda expressionBasic syntax:(parameters) -> expression或(parameters) ->{ statements; }Read the example study!Example one: Define a Ayperson class to prepare for subsequent tests.package com.evada.de;import java.util.Arrays;import java.util.List;clas

Syntax Format : (parameters), expression or (parameters)->{statements;}Create an array of type stringStatic string[] ATP = {"11", "22", "33", "44", "55", "66"};Convert it to a list collection using the Arrays Aslist methodStatic listused the Super for loop to iterate through the collectionpublic static void Main (string[] args) {for (String player:players) {System.out.print (player + ";");}Using lambda expressions and function actions (functional oper

Lambda An expressionform: parameter, arrow (-), expressionParameter type to write, if you can deduce it can not writeOnly one argument can omit parenthesesNo arguments to write empty brackets ()* If the branch returns a value, then all branches will return a value, otherwise it is illegalfunction interface: interface with only one abstract method (can be marked with @functionalinterface annotations)For example, you can do this in Javax.swing.Timer.　　　

box containing a message and an OK button, which will be in the center of its parent component.API javax.swing. Timer 1.2Timer (int interval, ActionListener Listener)Constructs a timer that advertises listener once every interval millisecond.void Start ()Start the timer. Once the boot is successful, the timer invokes the listener's actionperformed.API void Stop ()Stop the timer, and once the stop is successful, the timer will not be actionperformed to call the listener.Java. Awt. Toolkit 1.0Sta

implementation of the interface : use interface definition: The form is as follows 1 Interface printable{2 Final int MAX = +; 3 void Add (); 4 float sum (floatfloat y); 5 }Interface interface Name {interface Body}, in which the interface body is only abstract methods and constants of the declaration, constants are public static type, methods are public type, the above interface printable can be expressed in the following form: 1 interface printable{ 2 public final

New Arraylist(); List.add (0, "B"); List.add (1, "a"); List.add (0, "C"); List.add (1, "D");Itopable{String tmp=NULL; for(String item:strlist) {if(TMP = =NULL) {tmp=item; Continue; } if(Item.compareto (TMP) > 0) {tmp=item; } } returntmp; }); String top = sortdesc.top (list); System.out.println (String.Format ("Max:%s", top));@FunctionalInterface Interface Itopable { T Top (list list);}