java interview questions for testers

Java learning path-simple basic interview questions, java path-Questions 1. What are the features of object orientation? A: The object-oriented features mainly include the following: 1) Abstraction: Abstraction refers to the process of summarizing the common features of a cl

English Original: Java Exception and Error interview Questions Answers In the Java Core Knowledge interview, you always encounter questions about handling exception and error. Exception processing is a very important aspect of

Logical Thinking interview questions-java backend interview-,-java backend(-1) Preface I recently participated in an interview and was very interested in the pen questions. I will retur

Java interview questions, java questions1. Can a ". java" source file contain multiple classes (not internal classes )? What are the restrictions?A: Yes, but there can only be one public class. If there is a public class, the file name must be the same as the class name.2. D

Java Exception Handling interview questions, java exception handling questions 1. What are the differences between error and exception? An error indicates a system-level error. It is an internal error in the java Runtime Environme

Java interview questions, java questionsCommon Java interview questions: What if the main method is declared as private? Answer: It can be compiled normally, but the system prompts "the

Linked list is often in the interview, this article refers to some other articles, together with the small series of their own summary, the basic algorithm has been tested and optimized.Algorithm Daquan (1) There are also some list problems in the single linked list, which will be sorted out in the future.* REFS:* http://blog.csdn.net/fightforyourdream/article/details/16353519* http://blog.csdn.net/luckyxiaoqiang/article/details/7393134 easy to handle

Java exception architecture diagram and several interview questions, java architecture diagram questions 1. java exception Architecture The pink ones are checked exceptions, which must be captured by the try {} catch Block or dec

original types, and to use the standard placeholders that are used in the JDK.7. Write a generic program to implement LRU caching?This is the equivalent of an exercise for people who like Java programming. To give you a hint, linkedhashmap can be used to implement a fixed-size LRU cache, which moves the oldest key-value pairs out of the cache when the LRU cache is full. Linkedhashmap provides a method called Removeeldestentry (), which is used by the

execution.Surround notification is one of the most common types of notifications. Most interception-based AOP frameworks, such as Nanning and JBOSS4, provide only surround notifications.The concept of pointcut (pointcut) and connection point matching is the key to AOP, which makes AOP different from other old technologies that simply provide interception functionality.The pointcut enables the location notification (advice) to be independent of the OO hierarchy. For example, a around notificatio

10 classic Java interview questions and classic java questions 1. How does Java's HashMap work? HashMap is a key value for the data structure. Each key has a corresponding value. The key is to identify such a value. Based on the hashing principle, HashMap stores and obtain