java interview questions for 7 years experience

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 progra

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,

need. Read the Java futuretask example to learn how to use it.7. What is the implementation of concurrent containers?Java collection classes are fast failures, which means that when a collection is changed and a thread iterates through the collection using Iterators, the next () method of the iterator throws a Concurrentmodificationexception exception.Concurrent

processors. In addition, theJDKDesign and implement a modular system, and then apply the system toJDKitself can also be a trend, which makes large chunks of code easier to manage and facilitates code reuse for applications and large operations. Oracle says that theyJava8Is promising and has begun to discussJava 9Key areas of development, such as joining aself-tuning JVMTo increase the scalability of local integration and large-scale multicore, adding cross-language support for cloud application

keep the original base implementation. We can just inherit from it and rewrite the methods we need. Read the Java futuretask example to learn how to use it.7. What is the implementation of concurrent containers?Java collection classes are fast failures, which means that when a collection is changed and a thread iterates through the collection using Iterators, th

According to SECLISTS, they found that the new Reflection API did not undergo a very safe review when introducing Java SE 7, and there was a very large vulnerability. This vulnerability allows hackers to use a widely known method 10 years ago to attack Java virtual machines. The Reflection API in

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

115 Java Interview Questions and answers-ultimate list (I), 115 java This article will discuss various types of interview questions in Java interviews, which allow employers to test ca

solves this problem for us. After the online pool submits the callable task, a future object is returned, using which we can know the status of the callable task and get the result of the execution callable returned. The future provides a get () method so that we can wait for callable to end and get its execution results.Read this article to learn more about the callable,future example. 6. What is Futuretask?Futuretask is a fundamental implementation of the future, and we can use it with execut

., GC can avoid memory leaks and stack overflow, effectively improve the efficiency of memory utilization, It also frees programmers from tedious memory management.The string S=new string ("xyz"); How many stringobject are created?2, 1 in the text pool, 1 in the heap, first create 1 "XYZ" objects in the text pool, and then copy an "XYZ" object in the heap and assign it to the reference S.Ninth, Math.Round (11.5) How much? Math.Round (-11.5) how much?Math.Round (x) equals (int) Math.floor (x+o.5f

in February. The first day of 1751 in England was March 25, 11 days worse than France.After the United States adopted the Gregorian calendar, it went back hundreds of years, so that the dates originally recorded could be expressed in two calendars (usually to provide two dates for more precise purposes). For example, George Washington's birthday changed from February 1731 11 to February 1732 22.When you read a volatile variable in a thread, you can

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

Recently consider the issue of change work, so cast resume interview, interview 5 companies senior Java engineer, there are 4 gave me an offer, think of summing up the interview experience, convenient recently are looking for opportunities for youfirst, no pen questionDo not

Regular Interview Questions and answers by a ribaba Java engineer, Baba java 1. Implementation of Spring AOP and IOC Http://blog.csdn.net/tarena_lixy/article/details/7096114 Http://blog.csdn.net/kiss_vicente/article/details/6901295 Http://blog.csdn.net/it_man/article/details/4402245 2. Distributed message queue and dis

/*** 7-2* Joseph question* Programmed by the keyboard to receive a value of n, from the number of 1 people began to count,* The man who counted to 7* What is the number of the last person left in the output */importjava.util.*;p Ublicclasstest{publicstaticvoidmain (String[] args) {System.out.println ("Enter a value of n from the keyboard"); Scannerinput=newscanner (system.in); Intnum=input.nextint (); node[

/*** 7-4* Write a exercise class that contains the following methods* 1> Statistics (Object arc[]) method:* Count the number of occurrences of each letter (regardless of case) relative to the total number of letters,* Print Show this ratio* 2> Sort (Object arc[]) method:* Sort the given array.* Programmatically create an object of the exercise class,* Receive user input from the main method in English text,* and deposit it into the newly created objec

/*** 7-1* The program that writes the character interface, accepts a number of positive integers entered by the user,*-1 indicates the end of the input.* Sort the input data in descending order using the sort algorithm* and print the results after each scan* The runtime uses the following different data series to observe its execution results* 1. There is only one data in the sequence* 2. Duplicate data in a sequence* 3. The data entered in the sequen