reverse engineer java class

what you can do! For example, If you go to an interview with a Java engineer, you will have at least the function of the job, rather than just interviewing and doing a pen Test. so, This is what I wrote this article originally!first, the basic article1. Three main features of object-orientedinheritance, encapsulation, PolymorphismWhat is inheritance?① inheritance is one of the important reasons that object

Interview Summary--java the skills that senior engineer should master In front of the interview also summed up a and two, the third may be more inclined to the inner monologue and interview skills summed up it ... One, monologue Before interviewing others, now it's their turn to find a job, how to say it, each interviewer's opinion is different, the way the interview is different, such as I interviewed oth

ZoningDeep understanding of the JVM (Java Virtual machine) Master the role and rationale of program counters, heaps, virtual machine stacks, local method stacks, method areas (JAVA8 removed), meta-space (JAVA8 new). Master the division of the heap: The New Generation (Eden, Survivor1, Survivor2) and the old age of the role and working principle. Master JVM memory parameter settings and tuning.

first, the Java underlying basic problem1, the principle of SPRINGMVC and how to render the return data to jsp/html?A: The core of Spring MVC is dispatcherservlet, a request passed through Dispatcherservlet, forwarded to handlermapping, then reflected, corresponding The @requestmapping address of the controller and the methods inside it, and the final return to the corresponding view via Modelandview and Viewresoler. For specific reference: how Spring

conversion problem when the database stores the date format?A: Using timestamp, reason reference: time zone conversion problems encountered in Java programming6. What are the methods in the Java object class?Answer: What are the methods of object7. HTTP protocol, the difference between get and postA: Talking about the difference between get and post in HTTPIv. t

What do you need to learn to become a Java senior engineer? MACRO: 1. Technical breadthAt least you must be proficient in multiple open-source technologies and have studied Source Code such as struts and spring.2. Project ExperienceI have followed several major projects from start to end. The first is the demand stage, including demand research.Tail refers to the release after delivery, including the mainte

May 5, Guangzhou, Ali intern interview, Java Development Engineer, totally abused OrzAlmost no Java project development experience, close to 0 basis, to water a pitch, no suspense was brushed. RP is also a lever, the topic of the preparation has not been asked, algorithm problem is also a no orz, interviewer seemingly do not know what ACM is, GG. But the intervie

do more with the project process) Design pattern (familiar with common design patterns of the application scene, will draw class diagram, it is not possible to recite a few also useful) Multithreading (ask each time, including thread and process, thread state, thread concurrent operation, etc., need to be reviewed in depth) Java Collection Class Framework (under

-oriented analysis and Design (ooa/ood), involving patterns (GOF,J2EEDP), and integrated patterns. You should have a great understanding of UML, especially Class,object,interaction and Statediagrams.2. You need to learn the basics of the Java language and its core class library (collections,serialization,streams,networking, Multithreading,reflection,event, Handli

previous%, then there is an index effect, if you use a double% number match, then no index effect5, how to consider the time zone conversion problem when the database stores the date format?A: Using timestamp, reason reference: time zone conversion problems encountered in Java programming6. What are the methods in the Java object class?Answer: What are the metho

Java Development Engineer on-machine pen testTopic1. Make a program, enter 10 integers, and put in the array, output all the numbers in descending order, then count and output the number of positive, negative, and zero.2. Implement a simple English-Chinese weather converter: Enter the weather condition in table 1 The first letter of the English word, according to the input to determine the weather condition

What do you need to learn to become a Java senior engineer? MACRO: 1. Technical breadthAt least you must be proficient in multiple open-source technologies and have studied Source Code such as struts and spring.2. Project ExperienceI have followed several major projects from start to end. The first is the demand stage, including demand research.Tail refers to the release after delivery, including the mainte

What do you need to learn to become a JAVA senior engineer? MACRO: 1. Technical breadthAt least you must be proficient in multiple open-source technologies and have studied Source Code such as struts and spring.2. Project ExperienceI have followed several major projects from start to end. The first is the demand stage, including demand research.Tail refers to the release after delivery, including the mainte

Java Software Senior Engineer Pen Test"Intellectual part"(30 points)1. Burn an uneven rope for one hours, how to use it to judge half an hour? (5 points)Burn at both ends2.4,4,10,10, subtraction, how come 24? Four digits can only be used once (5 points)(10*10-4)/43. If you have an infinite number of water, a 3L and 5L bucket, how do you accurately weigh 4L of water? (5 points)The first step: put two times 3

that the locks provided by Java are object-level rather than thread-level, and each object has a lock, which is obtained through the thread. The wait () method in the calling object is meaningful if the thread waits for some locks. If the wait () method is defined in the thread class, it is not obvious which lock the thread is waiting for. Simply put, because Wait,notify and Notifyall are both lock-level o

, 139,072 Available Bytes E:\android\code>javac helloworld.javae:\android\code>dir The volume in drive E is not labeled. The serial number of the volume is the directory of 4485-2636 E:\android\code 2014/09/07 Sunday pm 01:40DIR>. 2014/09/07 Sunday afternoon 01:40DIR> .. 2014/09/07 Sunday pm 01:40 431 helloworld.class2014/09/07 Sunday pm 01:38 Helloworld.java 2 files 546 bytes 2 directories 95,979,139,072 Available Bytes E:\android\code>

database in the interface and see the default schema.If the default schema is not selected above, it is likely that the situation is, as always, in the pending state, the last time out, the error is: "Reading schema error:zip file closed"If you created a data source in database connection in the first step, you need to narrow the scope of the default schema in "Default Schema Filter".You can then start the reverse creation of the Po object

Some time ago participated in the Zhuhai far-light Java Development Engineer interview, I first interview, no experience plus preparation is not sufficient, fiasco. Here's a summary: lack of self-confidence This is probably one of the most important reasons. Because of inadequate preparation and lack of experience in the interview, resulting in their own extremely nervous and abnormal performance, to answer

involves multi-threading, so the question "How do you use multithreading?" "," How to control multi-threaded read and write files, how to control the repetition read and write "," explain the join operation ", the problem was not a bit of impression at the time, and now think about the interview did read before. Understand that will not, change the problem. "Did you do spring, explain spring mvc," "How to use Spiring," "IOC How to use" "What is the SPRINGMVC principle?" "What does Spring have t

How C ++ programmers explain the role of extern "C" to a java Engineer Today, I am working on Android development. What is external "C?I said: To enable C ++ to compile classes or functions programmed in C language. I guess he doesn't understand what I mean. Maybe I can't explain what this is. IntroductionC ++ retains the features of some procedural languages, so it can define global variables and functions