java scenario based interview questions

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

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

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

, multi-threaded communication or event notification, multiple processes) in concurrent programming through 6 subsections: 8-1 How to use multithreading 8-2 how to communicate between threads 8-3 how to do event notification between thread 8-4 how to use thread local data 8-5 How to use thread pool 8-6 how to use multi-process ...The 9th chapter of the use of decorative techniques advanced trainingUsing 6 bars to improve the use of adorners: 9-1 How to use the function adorner 9-2 how to save me

is then invoked according to the result of the processing to display the processing structure.The process of MVC: first the controller receives 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 display the processing structure. and renders it to the user through a view. If you want to correspond to MVC in a project, the Jsp,controler in the view corresponding project corresponds t

Java interview questions, java questions1/** 2 * write a function. It accepts an integer (assuming length) and returns an array. The length of the array is length, 3 * the content in the array is a random value ranging from 0 to (length-1) and cannot be repeated. 4*5 * If the length is 5, the array may be [, 4]. 6*7 *

Java interview questions, java questions 1. storage structures used by stacks and queues Chain storage and sequential Storage 2. understanding of time complexity and space complexityTime Complexity: Number of statement executions in an algorithm, which is T (n). When n ch

: 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

determines whether the input parameters are equal to comparator. This method returns true only if the input parameter is also a comparator and the input parameter is the same as the current comparator's ordering result. 29. What is the Java priority queue? Priorityqueue is an unbounded queue based on a priority heap whose elements are sorted in natural order (natural orders). At the time of creation, we ca

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.

interface requires the passing of two object parameters, if the first parameter is smaller than the second, a negative integer is returned, if the first one equals the second, 0 is returned, and if the first one is larger than the second, a positive integer is returned.What is the difference between 34.Comparable and comparator interfaces?The comparable and comparator interfaces are used to sort object collections or arrays. The comparable interface is used to provide a natural ordering of obje

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

Java Multithreading and Concurrency basics interview questions and AnswersOriginal link: http://ifeve.com/java-multi-threading-concurrency-interview-questions-with-answers/Multithreading and concurrency issues are among the

Interview Questions and answers for 40 Java sets and 40 Java Sets Provided by Beijing shangxuetang 1. JavaWhat is a collection framework? What are the advantages of a collection framework? Each programming language has a set. The original Java version contains several collec

/* 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

example 1:arraylist is a constant time operation that does not depend on the number of elements in the list. So its performance is O (1). Example 2: The performance of a linear search for an array or list is O (n), because we need to iterate through all the elements to find the elements we need.40. What are the best practices related to the Java collection framework?(1) Select the correct collection type as needed. For example, if you specify a size,

for an array or list is O (n), because we need to iterate through all the elements to find the elements we need.40. What are the best practices related to the Java collection framework?(1) 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 coll