java 8 lambda tutorial

Package Com.atguigu.java8;import java.util.arraylist;import java.util.arrays;import java.util.Comparator; Import Java.util.list;import java.util.treeset;import org.junit.Test; Public classTestLambda1 {//the original anonymous inner class@Test Public voidtest1 () {ComparatorNewComparator() {@Override Public intCompare (String O1, String O2) {returnInteger.compare (O1.length (), o2.length ()); } }; TreeSetNewTreeset(COM); TreeSetNewTreesetNewComparator() {@Override Public int

Original link: Top 8 diagrams for understanding JavaTranslators: AnchorTranslation time: October 29, 2013The world is always a picture more than tens of thousands of words!The following 8 images are from the program Creek Java tutorial, which is currently the most popular article on the site.I hope this article will he

A picture wins thousands of words, the following illustrations are from the Program Creek Web site Java tutorial, currently they have the most votes.1. String invarianceHere's a picture showing what this code doesString s = "ABCD"; s = S.concat ("EF");2. The difference between the Equals () method and the Hashcode () methodHashcode is designed to improve performance. The difference between the Equals () met

In this chapter we will learn about the stream API, a new feature in JDK 8. To understand the topic of this chapter, you need to know how to use lambda expressions and predefined functional interfaces in Java.util.function.A stream is similar to a pipe, but it transports not water and oil, but transports the data from the source to the destination. A stream can be parallel and concurrent, depending on how i

As we all know, the Java IDE is to help programmers to write and debug Java programs more easily, a good IDE has a lot of features, such as debugging, editing, switching views and so on.The IDE's choices involve many aspects, such as the nature of the project, the team's and business preferences, and so on, but for some basic requirements, every good IDE must be fulfilled, for example, to support the langua

A picture wins thousands of words, the following illustrations are from the program Creek Web site Java tutorial, currently they have the most votes. If the plot does not explain the problem, then you can use its title to get a glimpse of it.1. String invarianceHere's a picture showing what this code does 12 String s = "abcd";s = s.concat("ef"); 2. The difference between the

A picture wins thousands of words, the following illustrations are from the program Creek Web site Java tutorial, currently they have the most votes. If the plot does not explain the problem, then you can use its title to get a glimpse of it.1. String invarianceHere's a picture showing what this code does 12 String s = "abcd";s = s.concat("ef"); 2. The difference between the

A picture wins thousands of words, the following illustrations are from the program Creek Web site Java tutorial, currently they have the most votes. If the plot does not explain the problem, then you can use its title to get a glimpse of it.1. String invarianceHere's a picture showing what this code does 12 String s = "abcd";s = s.concat("ef"); 2. The difference between the

Research on Android multithreading (8) -- Understanding Atomicity in Java and multithreading in android1. What is atomicity? Atomicity is the smallest unit in the world and is severable. For example, if the = 0; (a is not of the long and double types) type, this operation is an atomic operation. For example, a ++ is actually a = a + 1; it is split, so it is not an atomic operation.II. The role of atomic ope

The string from the surface, is the data between the quotation marks, such as "www.weixueyuan.net", "micro-school", "C + + Introductory tutorial" and so on. In Java, the string processing class library uses the most of the two types:the "string" Class and the "StringBuffer" class .Note: If you are working with some small text, it is recommended to use the "String" class, which is particularly handy. If you

A picture wins thousands of words, the following illustrations are from the program Creek Web site Java tutorial, currently they have the most votes. If the plot does not explain the problem, then you can use its title to get a glimpse of it.1. String invarianceHere's a picture showing what this code does 12 String s = "abcd";s = s.concat("ef"); 2. The difference between the

Introducing a Java-based 0 Basic Learning Java website, introducing a series of tutorials for learning Java-the Pike it tutorialHere is a tutorial on the Java system: 1? [Java Tutorial