I used to have only one Java interview question topic. Now I have divided into the following topics:
Java interview questions are of course the focus, all of which are Java programming and directly related to the design.
Intelli
Original reference Https://mp.weixin.qq.com/s/mCVL6qI33XeTg4YGIKt-JQ1. Event BrokerAdds an event to the parent element, using the event bubbling principle, to get child elements based on E.targetLet Parentbox = document.getElementById (' Parentbox ');Parentbox.addeventlistener (' click ', Function (e) {if (e.target e.target.nodename = = = ' LI ') {Let item = E.target;Console.log (item);}})2. Using closures in loopsvar arr = [1,2,3,4,5];for (var i=0; iSetTimeout (function () {Console.log (i)},10
Java Collection related interview questions and answers Interview questions1.JavaWhat is a collection frame? What are some of the advantages of a collection framework? There are collections in each programming language, and the original Java version contains several collect
Links: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Original: Http://www.journaldev.com/1162/java-multi-threading-concurrency-interview-questions-with-answersMultithreading and concurrency iss
Java interview question Summary 2 (Continuous updates), java questions
1. How to format a date
Answer:Date now = new Date ();
SimpleDateFormat sdf = new SimpleDateFormat ("yyyy-MM-dd hh: mm: ss ");
String formatNow = sdf. format (now );
The formatNow variable is the formatted date.
2. What are several implementation m
Several common js interview questions1. About the number type conversion in "+" and "-"
Var a = ''+ 3; // try to convert 3 to the string var B = 4; console. log (typeof a); console. log (a + B); console. log (a-B); // try to convert the string to numbervar foo = "11" + 2 + "1 "; // Add a string '1' and subtract a string '1. log (foo); console. log (typeof foo );
2. De-duplication of js Arrays
Easy to think
After JDK5, Java provides a more convenient security mechanism that uses lock locks for thread-locked operations and release operations without using synchronized . More clear. Example:Lock lock=new Reentrantlock ();Lock.lockCode that needs to be lockedLock.unlockWhy is lock more secure? Because synchronized may cause deadlock phenomenon, specifically about the deadlock phenomenon can refer to the operating system, there is no more to say.Summarize th
dispatch and dispatch, and a smaller unit that can run independently than a process. Thread's StrokeThe sub-scale is less than the process, which makes the multi-threaded procedure highly concurrency, and the process typically has independent memory units at execution time, while the threads can share memory. Programming with multithreading often leads to better performance and user experience,But multithreaded programs are unfriendly to other programs because they may consume more CPU resource
Java interview questions
Basic knowledge:1. simple principles and applications of the Exception Handling Mechanism in C ++ or Java.
When a Java program violates the Java Semantic Rules, the Ja
[LeetCode-interview algorithm classic-Java implementation] [014-Longest Common Prefix (Longest Common Prefix)], leetcode -- java [014-Longest Common Prefix (Longest Common Prefix )][Lee
First, let's talk about the differences between final, finally, and finalize. Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )? Third, the difference between static nested class and inner class is that the more you say, the better (the more general the interview questions are ). Fourth, the difference bet
115 Java Interview Questions and answers-ultimate list (I), 115 java
Object-Oriented Programming (OOP)
Java is a computer programming language that supports concurrency, class-based, and object-oriented. The advantages of object-oriented software development are listed bel
:orcl", id,pwd);How to establish a connection to the Sybase database:Connectioncon=drivermanager.getconnection ("jdbc:sybase:tds:mydbcomputernameorip:2638", ID,PWD);How to establish a connection to a SQL Server database:Connectioncon=drivermanager.getconnection ("Jdbc:microsoft:sqlserver://mydbcomputernameorip:1433;databasename= Master ", id,pwd);How to establish a connection to the DB1 database:Connectioncon=drivermanager.getconnection ("Jdbc:db2://mydbcomputernameorip/mydbname", ID,PWD);(3) Cr
Original link: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here,
Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here, the most important questions are listed from the interview point of view, but you should still have a solid grasp of the basics of
Basic java exception knowledge and some interview questions
Java is an object-oriented design language, so exceptions are encapsulated into classes in java, and we only need to know how to handle exceptions,
Exception Overview
Exception: An exception occurs when the
; k ) TestFunction (k, J, i);On the basis of scenario one, this scheme puts the instantiation of the cyclic variables out of the loop, which can further reduce the number of instances of the related cyclic variables, and the scheme time-consuming situation is as follows:
Variable
Instantiation (number of times)
Initialization (number of times)
Comparison (number of times)
Self-increment (number of times)
I
1
1
10
1
Java custom generic interview questions: receive any array to reverse, java custom
You can only operate on a certain type for reversal without using the generic type.
The Code is as follows:
package com.swift.fanxing;import org.junit.Test;public class RenyiReverse { @Test public void test() { int arr[]=new
Analysis of Java interview questions and prevention of SQL injection, semi QL
This article focuses on a common question in the Java interview questions, how to judge and prevent SQL Inj
Java interview questions: Implementation of stacks and queues
During the interview, stacks and queues are often checked in pairs. This article includes the following stack and queue test content:
1) stack Creation
2) create a queue
3) Two stacks implement one queue
4) two queues implement one stack
5) design the stack
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