logical programming questions in java

Logical Thinking interview questions-java backend interview-,-java backend(-1) Preface I recently participated in an interview and was very interested in the pen questions. I will return to Baidu. Thinking about these questions re

Summary of Java back-end development interview questions of major companies, and java back-end interview questions ThreadLocal (thread variable copy) Synchronized implements Memory sharing. ThreadLocal maintains a local variable for each thread. It uses space for time, which is used for data isolation between threads

Java learning path-simple basic interview questions, java path-Questions 1. What are the features of object orientation? A: The object-oriented features mainly include the following: 1) Abstraction: Abstraction refers to the process of summarizing the common features of a class of objects to construct classes, includin

Java interview questions, java questions1. simple principles and applications of the Exception Handling Mechanism in C ++ or Java.When a JAVA program violates the JAVA Semantic Rules, the JAVA Virtual Machine will indicate an erro

different ways to create objects in JavaA few common questions about Java collectionsWhen classes are loaded and initializedTwo stack implementation queue two queue implementation stackUpdated on 2017/3/12Java Collection.sort () Sort by Time listSingle sign-on principle and simple implementationUpdated on 2017/3/13Aqs detailedJava's concurrent PackageJava Concurrency Toolkit java.util.concurrent User Guide

First and everyone said the joke: a choice in your eyes, see a option well this question should be a, see B option B seems to be right ah, see C option C seems to have seen in the book, see D option This is not and a a meaning. Daniel Eye A option well this question is a, see B option Well this question is a look at the C option well this question is a see D option well this question is a This is the gap between you and Daniel-the basis and know why1, the following statement is correct ()A. Two

object's metadata. But int is a primitive type of data, so it takes up less space.18. Why is the String in Java immutable (immutable)? (Answer answer)The string in Java is immutable because Java designers believe that strings are used very frequently, and that setting the string to immutable allows multiple clients to share the same string. See the answer for mo

. JavaScript Common objects6, commonly used in JavaScript value assignment method, for radio button, check box, such as the value assignment method. (Baidu can, JavaScript common basis)7, jquery value Assignment Basic method.8. Get the value of the radio button, get the value of the check box, get the value of the drop-down list, go to the value of the check box, get the value of the radio button Group, text box, text field assignment.9, the Append of jquery and appendto difference.10, the CSS B

⑥modelandview view is a logical view, and Dispatcherservlet also uses viewresolver to accomplish parsing from a logical view to a real view object.⑦ when a real view object is obtained, Dispatcherservlet uses the View object to render the model data.The ⑧ client gets a response, either as an ordinary HTML page or as an XML or JSON string, or as a picture or a PDF file.37. Why do you choose to use the Sprin

difference between collection and collections.You mustn't say that one is singular and one is plural.Collection is the upper interface of the combination class, the sub-interface has list and set, etc., Collections is a tool class under Java.util, and provides some column static methods to synchronize the collection search sort thread.Six, when to use the Assert.An API-level technician might ask this.Used in debugging and optimization to determine whether a

.char variable?Save Unicode to save Chinese characters20. Start a thread with run () or start ()?Start ();Run () put the executed code insideThird, intermediate simple answerWhat is the difference between 21.sleep () and wait ()?Sleep to the time to wake upWaiting to wake up22.JDBC How do transactions work?Set JDBC Auto-commit false to open transactions after multiple transactions commit exception rollback rollbackHow do I access the database in 23.Java