Java

What is FindBugs? FindBugs is a static analysis tool that finds bugs in Java programs . It compares the bytecode to a set of defect patterns by examining the class or jar file to identify possible problems. With the static analysis tool, you

This article is written about JDK1.5 's upgraded producers and consumers.Workaround after Java upgrade:LockJava.util.concurrent.locks Interface Lock All known implementation classes:

now the computer's processing performance is getting better, plus the JDK upgrade to some code optimization, adjustments to some details at the code level may not see a noticeable improvement in performance,But I think in the development of

Problem Description:In the process of using spark, there are two types of errors that sometimes occur because of data increase:Java.lang.OutOfMemoryError:Java Heap SpaceJava.lang.OutOfMemoryError:GC Overhead limit exceededThese two kinds of errors

Recently in the project with Eclipse, the new project when everything is new, with the latest version, in the Dynamic Web Module version column selected the latest version 3.0, the project when the program was the error, on the Internet to see HTTP//

1 descriptionGarbled problem:Gets the garbled problem in the request parameter; Post request: request.setcharacterencoding ("Utf-8"); Get Request: NewString (request.getparameter ("xxx"). GetBytes ("Iso-8859-1"), "Utf-8"); Garbled

1 What is the Filter?Filter Javaweb One of three components, it is very similar to the servlet! No it filters are used to intercept requests, not to process requests.When a user requests a servlet, the filter that is deployed on the request is

① Read more: Download some Java-related information, more read more dozen code, and then think summary, book read times, its righteousness from now. If you can't find the right information, you can go to the North Web forum to find a suitable for

Recently studied the next threadpoolexecutor, found that there are some areas to be pondered. First move the JDK1.6 document here.One ExecutorService , it uses a number of possible pool threads to perform each submitted task, usually using the

The IDE I'm using is idea, and the places where eclipse may be set up are different1. Encoding of source filesWhen writing. java files in various Ides, there is an encoding that the IDE stores files on the machine in this encoding format, such as my

Java Theory and Practice: Concurrent collection Classes util.concurrent In addition to many other useful concurrent building blocks, the Douglea package contains some of the major collection types List and Map high-performance,

First, describeThe definition of palindrome:"palindrome number" is the same integer that reads backwards. If the odd number of numbers: 98789, the number is 98789, the reading is 98789, even the number of the number 3223 is a palindrome number. We

Time flies, suddenly I came to the Silicon Valley Java training and learning has been one months. Looking back on the one months of study, my harvest is still a lot. So I made the following summary for my one months of study.　　1. Teaching　　 The

This paper mainly combines the Restfuljava backend and summarizes the exception processing architecture.1. Classification and processing methods of exceptionException is a very important feature of object-oriented language, and good exception design

The relationship between the 8 kinds of sorting:1, direct Insert sort(1) Basic idea: In the set of numbers to be sorted, assume that the number of front (n-1) [n>=2] is already a rowIn a good order, now you want to insert the nth number into the

First, you get a copy of the Word template you normally need, using the letters that you can use to distinguish the data that you want to fill with the program, such as XXXXX.The second step is to convert the Word template into an XML file (Word can

Tab sliding label, comprehensive ViewPager + Fragment + custom Tab + ActionBar content1, The second menu, TAB1, TAB2, and TAB3, is an online example. The first menu is changed based on it. 2. Menu Menus are implemented in two ways: Layout files and

Java-Compare Version Numbers Compare two version numbersVersion1AndVersion1.IfVersion1>Version2Return 1, ifVersion1Version2Return-1, otherwise return 0. You may assume that the version strings are non-empty and contain only digits

Front-end technical study, front-end technology Here is index.html   If it is frameset, no body is required.   Error: Solution: left has no resources and Error 404 is displayed. When we are working on the framework, frameset can be understood as

Java Network Programming Note 4 Socket and ServerSocket. network programming can be divided into creating a Socket, opening the input stream and output stream connecting to the Socket, programming the Socket, and disabling the Socket. Create Socket