java data structures interview questions

Development and running environments is the first step to become a Java programmer. By examining the basic aspects of Java programming, we can fully reflect the degree of understanding and proficiency of the interviewer in Java. In this chapter, I will explain the test points of the basic part of Java programming from

Concise answers to several java interview questions, concise java interview questions The difference between equal and = in java: The equal method is used to compare object references u

differences, HashMap and hashtable differences (learn the coding patterns in the underlying JDK for these classes).18, GC is what, why should have GC, simple introduction GC.19, float f=3.4 is correct.20. Introduce the collection framework in Java.21. Implementation of the comparison method in collection framework22. The difference between string and StringBuffer23, final, finally, finalize the difference24. Object-oriented features25, string is the

object is accessed, nullpointerexception is thrown. Another scenario is that Java allows programmers to extend this semantic check. programmers can create their own exceptions and choose when to use the throw keyword to cause exceptions. All exceptions are subclasses of Java. Lang. thowable. 3. What is the difference between sleep () and wait?A: Sleep () is a thread-like thread method. As a result, this th

Some days ago, I wrote an article in the blog Park, how to introduce my project experience in the interview, Harvest more than 2000 clicks, which undoubtedly inspired me to continue to share the enthusiasm, today I come to share another interview can even help everyone to reverse the skills, this article is from the Java Web Lightweight Development

indexer, with key as the index subscript, get the corresponding value. And through the source can see that key and value are ICollection types of a set of sets. And also defines some common methods of dictionary operation. Add, include judgment, remove, etc. These two interfaces are the base class for all dictionary data structures. In a generic interface, you can also see that it inherits a KeyValuePair =

of the lock interface in Java than the synchronized block? You need to implement an efficient cache that allows multiple users to read, but only one user is allowed to write in order to maintain its integrity, how will you implement it?The biggest advantage of the lock interface in multi-threaded and concurrent programming is that they provide a lock for both read and write, which satisfies high-performance data