java interview programs for experienced

Java Multithreaded interview questions 1. What is the difference between processes and threads? A process is a stand-alone (self contained) operating environment that can be viewed as a program or an application. A thread is a task that is performed in a process. The Java Runtime environment is a single process that contains different classes and

Multithreading and concurrency issues are one of 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 Java multithreading Basics to meet the future problems. (Proofing Note

Java programmer interview book-I ++, java book-IWhat are the output results of the following programs? public class program2 { static { int x = 5; } static int x,y; public static void main(String[] args) { x--; myMethod(); System.out.println(x + y++ + x); } private static v

Java Multithreading interview question 1. What is the difference between a process and a thread?A process is a standalone (self contained) operating environment that can be viewed as a program or an application. A thread is a task that executes in a process. The Java Runtime environment is a single process that contains different classes and

Elliotte Rusty Harold This article is translated from the o'reilly American Head Office website, Do not think that Java can only be used to design dynamic images on Web pages. In fact, Java is a fully functional programming language and the first choice of many programmers today. Because the Java language has a clear architecture, provides dynamic memory manageme

programs to understand, write A packet containing ^, $, \ A, \ s, \ Q, + ,? , (), {}, [] And other regular expressions, and then tell you that this is a "like this ...... "string SEARCH, are you going to crash? This code is really hard to read, so you have to spend more time on regular expressions. 　Note: Regular Expressions are evil and powerful, but difficult to control.Suggestion 58: UTF Encoding is strongly recommended.

based on the runtime, while the static method is statically bound at compile time. The static method is not relevant to any instances of the class, so it is conceptually not applicable.4. Is it possible to access non-static variables in a static environment? The static variable belongs to the class in Java, and it has the same value in all instances. Static variables are initialized when the class is airborne into

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

Question: What happens if the main method is declared private?Answer: Can compile normally, but will prompt "Main method is not public" when run.Question: What is the difference between a reference and a pass in Java?Answer: A pass-through refers to an address rather than the value itself, and a pass value is a copy of the passed value.Question: What else to consider if you want to override the Equals method of an object?Answer: Hashcode.Question: How

databaseHibernate's first-level cache is provided by the session, so it only exists in the session's lifetime, when the program calls save (), update (), Saveorupdate (), and calls the query interface List,filter, Iterate, if there are no corresponding objects in the session cache, hibernate will add the object to the first level cache and the cache will disappear when the session is closed.Hibernate's first-level cache is built into the session, cannot be uninstalled, and can not be configured

Presumably, Java users have used JDK containers, List, Set, and Map. Every day, the code runs in thousands of JVMs around the world, and every day programmers are using these classes. Do you know who wrote these cool code? Is Joshua Bloch. He used to work in Sun. Now he jumped to Google and Google is invincible. He is a master. Although he is a master, he is also writing code, so such a person's article must be down-to-earth. Instead, some of them onl

Describes the 7 zones in the JVM, and then describes the scenarios in which each zone can cause a memory overflowProgram Counter: As the current thread doesbyte code line number indicator。 is a threadPrivateMemory, and the only piece does not report outofmemoryerror exceptions.Java Virtual machine stack: Used to describe a Java method.Memory Model: When each method is executed, it will create aStack FrameFor storinglocal variable table, operand stack,