debugging interview questions java

The super. getClass method of Java interview questions is called. Today, I read a Java interview question from the Internet, and the result fell into the trap. I think this interview question is quite good, so I will share it with

. } } 56. Problem: Give an integer variable A, write two pieces of code, the first set of a bit3 is 1, the other bit does not change, how to implement it? /** * @author sanchan * @since 1.0 */ publicclassTest{ publicstaticvoidmain(String[]args){ //给一整型变量a，写两段代码，第一个设置a的bit3 为1，其他bit不变，怎么实现呢？ inta=8; //打印二进制 System.out.println(Integer.toBinaryString(a));//输出 1000 System.out.println(Integer.toBinaryString(a|4));//输出 1100 }

This article includes a variety of tedious Java written/interview questions, some of which are easy to forget and occasionally updated. I also hope that you can leave a message below to post all kinds of tedious test and interview questions you have encountered or seen.J2EE

). In the process of populating the handler, depending on your configuration, Spring will do some extra work for you: Httpmessageconveter: Converts the request message (such as Json, XML, and so on) to an object, converting the object to the specified response information. Data Transformation: Data conversion for a request message. such as string conversion to Integer, double, and so on. Data is initialized: Data is formatted for the request message. such as converting a string into a formatt

COSCO Java interview question zzz COSCO Java interview questions Java training materialsI. Java language1. Three basic features of object-oriented2. Concepts and differences between met

Controller: When the user clicks the Submit button in the Web page, the controller accepts the request and invokes the appropriate model to process the request. The corresponding view is then called according to the result of the processing to display the results of the processing. MVC process: First the controller accepts the user's request, invokes the corresponding model for business processing, and returns the data to the controller. The controller invokes the corresponding view to

First, let's list these 32 questions. You can leave me alone and think about what it will do if the interview feels like. 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

) Select the correct collection type as needed. For example, if you specify a size, we will choose an array instead of a ArrayList. If we want to traverse a map in order of insertion, we need to use TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based prog

TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based programming, allows us to easily change the implementation later.(4) Always use type-safe generics to avoid classcastexception at run time.(5) Using the immutable classes provided by the JDK as key to t

corresponding action, while the user's data to fill the corresponding actionform, and then the Actionform is distributed to action for processing.3.Action automatically calls the Excute method, in which the action takes the user-filled data from the Actionform and invokes the model (JavaBean) for processing, and then displays the results of the processing in a different view (JSP page)struts-config.xml:struts 's configuration file .It says that each user's request is handled and forwarded throu

Java Algorithm interview questions: Read all names from text files similar to the following, print duplicate names and repeated times, and sort by repeated times; read docx and read doc. Use the poi jar package to provide download, Read all names from text files similar to the following, print duplicate names and repeated times, and sort by repeated times 1, Zhan

Design a method for java interview questions to obtain random numbers in any range. When learning java basics, you may listen to the random numbers between 1 and 100 at most, so we should first write a random number between 1 and 100. The Code is as follows, public class MathDemo1 { public static void main(Str

More than 100 typical JAVA interview questions and answer analysis (1) This article will discuss various types of interview questions in Java interviews, which allow employers to test candidate's

. Briefly describe the meaning of the viewThe meaning of a view lies in two ways:1) simplify complex queries. If you need to perform a complex query frequently, you can build a view based on this complex query, and then query this view.2) Restrict data access. A view is essentially a SELECT statement, so when you access the view, you can only access the columns that are involved in the corresponding SELECT statement, and the other columns in the Base table act as security and secrecy.11. What ar

after the real object is called.Proxy mode,The proxy class and the proxy class implement the same interfaceAn instance of a proxy class in a proxy classBehavioral patterns: Focus on communication between objectsSuch as: Responsibility chain mode, iterator mode, command modeResponsibility chain ModelSimilar interceptors, etc.Command mode:Separates callers from Callee's behaviorInterpreter mode:Each syntax is an interpreter classIterator mode:Change the collection class's view traversal and add a

A few days ago in the Java interview problems encountered, this is only part of the problem, there are many questions in the interview about data structures and algorithms. Here to summarize, hope that the ability of people can try to do, and in the comment area to leave your answer, let everyone learn from each other.

Sword refers to the Java Implementation of offer programming questions-interview question 5 prints the linked list from start to end and offer from end to endTopic Description * sword refers to offer interview question 5: print the linked list from the end to the endEnter the head node of a linked list and print the va

Frontier Dream Workshop 2017-04-18 18:14 Most of the Java interview is divided into written and interview, the following issues are cutting-edge education small series according to the major IT enterprises interview asked the questions sorted out, such as the need for releva

Interview questions-java Design Pattern Example 1, adapter modeInvolves three roles: Target destination interface, Adaptee source role, adapter adapter,adapter The source interface to the target interface, inherits the source interface, and implements the target interface .Many examples of Java I/O operations are:Input

a daily sentence: Life is full of expectations, the dream of connecting the future! Java fresh or self-taught beginner's written interview topic summary, I hope that everyone has help, the topic from their own learning summary and teacher explanation, network resources, books and materials. Knock out everyone to see, every time to update the topic, I hope you can find a good job.Part I: The basic partThe un