java interview questions and answers

Today, I found the java interview programming questions in the Forum and thought about it. I found that I forgot my original programming basics. Question: How many equals 2x8 in the most efficient way? Along with the targeted thinking, I thought of 2x8. Later I thought that this efficiency was definitely not the best. think of the concept of a computer system,

1. String S1 = ' 123 ';String s2 = new string ();2. The difference between two ways of implementing multithreadingInheriting the thread and implementing the Runnable interface3. Single-column design mode What's the difference between lazy and a hungry man? * * *Lazy style Features: lazy loading. Delayed loading in multi-threaded security problems, through the addition of synchronization to solve, plus synchronization efficiency is low, with a double-judge method to solve the low efficiency. The

You can only manipulate a type to invert without a generic typeThe code is as follows: Packagecom.swift.fanxing;Importorg.junit.Test; Public classRenyireverse {@Test Public voidTest () {intarr[]=New int[] {1,10,6,9,2}; Reverse (arr); } Public voidReverseint[] arr) { for(inti=0;i) { inttemp=Arr[i]; Arr[i]=arr[arr.length-1-i]; Arr[arr.length-1-i]=temp; } for(intX:arr) {System.out.println (x); } }}Generic functionality can

function body are usually on the stack.Heap: usually assigned and released by programmers. The memory allocated by using new and malloc functions is on the heap. 59. What is the role of adding static before member variables and member functions?A: They are called common member variables and common member functions, also known as class member variables and class member functions. They are used to reflect the status of the class respectively. For example, a class member variable can be used to co

asks you to write an immutable object, or asks you why the string is immutable.15) What are the common problems you encounter in a multithreaded environment? How did you deal with it?Memory-interface, race conditions, deadlocks, live locks, and starvation are often encountered in multithreaded and concurrent programs. The problem is endless, and if you get it wrong, it will be hard to find and debug. This is most of the interview-based, not the actua

Latest Android interview questions and Android interview questions Recently, I want to change my job for some reasons. I want to sort out some questions that I think are worth recording during the interview and give them a referen

10 interview questions for programmers I like most and 10 interview questions for programmers Recently, I have read many articles about interview questions. I really don't understand it. The interviewer wants to hire the best prog

Oracle Pen questions Oracle DBA face questions and answers (foreign companies)Oracle Database Pen Test DBAOracle Interview Pen test for international large companiesOracle Database DBA Interview Questions1. How many memory layers are in the shared pool?2. How did you find th

This section contains questions about XML in Java, JDBC interview questions, regular expression interview questions, Java errors and exceptions, and serialized faces .125) What is the d

IT Industry Classic interview questions, 121 sets of face questions Resource size: 580.80KBResource type:Publisher: EyelifeRelease Date: 2 days agoTag: Famous Enterprises, computerResource score: 10Download Number: 8574.33/347 Person rating 1 2 3 4 5 Comments Collection report sharing--> Comment Share Collection report upload Using the

any other reasons, but I only saw IT interview questions occasionally. I was interested in a simple test. However, after tracking and monitoring, CX0017: error: the symbol "TOTAL_ELEMENTS" is not found, but the cause is still not found. If you have any knowledge, you may wish to give some advice ...... Interesting interview