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Some questions that are frequently asked during interviews with Java programmers on the Internet, although a little old, are still worth reading.
1. Let's talk about the differences between final, finally, and finalize.
Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class. Therefore, a class cannot be declared bo
Java's current heat has declined, but there are still a lot of people who learn java. Java's post is also a lot of infiltration. So, those classic Java knowledge points, you can see the problem can say 123? Come and have a look.The difference between 1.JDK and JRE What is the difference between 2.final, finally, and finalize?3. The difference between threads and processesHow does the HashMap in 4.
requirements graphically in various phases of software development; IBMRational Rose is one of the many UML modeling tools in the requirements phase, often used in drawing examples, class diagrams, sequential graphs. 15. Describe the tool class that you exported, and indicate the maximum amount of data
POI (combining cell objects and background color applications)
Finally here also found some of Baidu Library interview
that this stage will bring me higher expectations, of course, the interview when normal people will not remember the spelling of each parameter, I wrote this paragraph when I also turned over the manual. The answer to this section is less than 2%.PS: Add up to less than 100%, is because there are really few directly say do not know, or directly refused to answer = =#Analyze the second question: "What is the Thing":1. Objects that are not used.Analysi
overloading.
25th, can you inherit the string class?
The string class is a final class and therefore cannot be inherited.
26th, when a thread enters an synchronized method of an object, can other threads enter other methods of this object?
No, one synchronized method of an object can only be accessed by one thread.
27th, there is a return statement in try {}, so will the code in the finally {} after this try be executed, when it is executed, before or after it?
Will execute, before return.
1 , what are the aspects of object-oriented features ? The object-oriented programming language has 4 main features: encapsulation, inheritance, abstraction, polymorphism, etc.Details:http://www.cnblogs.com/guweiwei/p/6599289.html2 , access modifiers public,private,protected, and what is the difference between not writing (the default)? Defaults to default when members of a class do not write access adornments. The default is equivalent to exposing (public) to other classes in the same packag
we don't want to repeat, we should use set.
(2) Some collection classes allow the initial capacity to be specified, so if we can estimate the number of storage elements, we could use it to avoid a hash or resize.
(3) Based on interface programming, rather than on implementation programming, it allows us to easily change implementations later.
(4) Always use type-safe generics to avoid classcastexception at run time.
(5) using the immutable class provided by JDK as the key of the map, you ca
1 . What are worker threads and SwingWorker and how do I use them? When a swing program needs to perform a long task, it is usually done using a worker thread. Each task executes in a worker thread, which is an instance of the Javax.swing.SwingWorker class. The SwingWorker class is an abstract class; You must define its subclasses to create a SwingWorker object, which is usually done using anonymous inner classes. SwingWorker provides some features of communication and control: [1]swingworker su
:
The above can solve the POST request garbled problem. There are two garbled methods for GET request Chinese parameter:Modify the Tomcat profile add code to match the project code as follows:
Another way to re-encode parameters:
StringuserName =newString (Request.getparamter ("UserName"). GetBytes ("Iso8859-1"), "Utf-8")
Iso8859-1 is the tomcat default encoding, and the Tomcat encoded content needs to be encoded by utf-8What is
multithreading problems include producer consumers, philosophers, readers, and simple bounded buffer. Knowing the basic concept of a thread is far from enough. You must know how to handle deadlocks, race conditions, memory conflicts, thread security, and other concurrency problems. With these skills, you can easily deal with multithreading and concurrent interviews.Many Java programmers will go to the interview
Java Collections Interview QuestionsIn Java, collection interview questions is mostly asked by the interviewers. Here are the list of mostly asked collections interview questions with
Job-hopping is not frequent, but has participated in a lot of interviews (telephone interview, face to faces interview), large/small companies, Internet/traditional software company, batter (above his business, lack of actual combat experience, hang off), also face, fortunately not because of failure and discouraged, in the process of constantly check gaps, developed a practical, Trace, continuous improveme
/*
Interview questions: Final modification of local variables
Base type: The value of the base type cannot be changed.
Reference type: The address value of a reference type cannot be changed, but the value of the object's heap memory can be changed.
*/
Class Student {
int age = 10;
}
Class Finaltest {
public static void Main (string[] args) {
Local variables are basic data types
int x = 10;
x = 100;
SYS
XML interview questions include XSLT techniques for transforming XML files, xpath,xquery, and XML basics such as DTDs or schemas.
This article will see 10 common XML interview questions and answers. Most of these questions are as
Java Algorithm interview questions: What are the methods for sorting? List. Use JAVA to implement a fast sorting. Select bubble quick set to sort by at least four methods, java Algorithm
Package com. swift; import java. util. arra
Summary and Induction of JAVA interview questions of Niuke Network (1), Niuke javaPreface
Today, I saw an article on explaining the Spring framework in the Nuggets. The article mentioned Niu Ke's interview questions. As a result, I downloaded the Niuke web app and found that
Java Multithreading interview QuestionsMultithreading and synchronization are considered as the typical chapter in Java programming. In game development company, Mulithreading related interview questions is asked mostly. A List of frequently asked
(throughput) collector? The throughput collector uses a parallel version of the new generation garbage collector, which is used for medium-sized and large-scale data applications. The serial collector is sufficient for most small applications, which require about 100M of memory on modern processors. 41. In Java, when can objects be garbage collected? This object can be recycled when the object becomes inaccessible to applications that currently use t
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