common java interview questions

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

Common Database interview questions and database questions1. Foreign key candidates for primary key superkeys Primary key: A combination of data columns or attributes that are unique and fully identified for the stored data objects in the database table.A data column can have only one primary key.And the value of the primary key cannot be missing, that is, it can

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

deadlock problems are common when writing multithreaded concurrent programs, but many candidates are not able to write deadlock free code (no deadlock codes?). ), they struggled. Just tell them that you have n resources and n threads, and you need all the resources to complete an operation. For the sake of simplicity here the n can be replaced with 2, and the larger the data will make the problem look more complicated. Get more information about dead

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

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.

considered as follows:1. During the run of the program, a layout will not change after inflate, unless it is restarted.Because viewstub can only be inflate once and then be empty, you cannot expect to use Viewstub to control the layout later. So when you need to show and hide a layout more than once at run time, Viewstub can't. You can only use the visibility of the view to control it.2. You want to control what is displayed and hidden is a layout file, not a view.Because the ID of a layout fil

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

JQuery Interview Questions and AnswersJavaScript is the standard language for client-side scripting, and jQuery makes it easier to write JavaScript. You can achieve more with just a few lines of jquery code. It is one of the longest used JavaScript libraries, and there are few new projects that use native JavaScript without jquery. For you as a Java Web Developer

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

: 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

Interview Questions: common linux commands and common linux commands Command for displaying directories and files Ls: Command Used to view all folders. Dir: command Tree used to display the specified folder and Directory: list the directory content in a Tree chart Du: displays the directory or file size. Modify directo

Common algorithm questions in iOS interviews and common iOS interview Algorithms I. Preface Here is an algorithm question you have encountered in your iOS job search. I hope it will help you. Occasionally updated. If you want to run code debugging online, you can copy the code here. Then perform debugging. The followin

AlgorithmOne of the frequently asked questions is searching or sorting. I personally feel that 80% of the questions are related to searching and sorting. The time complexity of most common sorting algorithms is O (nlogn) This can only be a general solution. This requires a low level of time complexity in algorithm intervie