When we try to synchronized a collection, coverity scans with a hint of bad choice of lock object.
Refer to the following code:
public class Test {public static void main (string[] args) throws Exception {integer in = new Integer (123
29); Thread1 thread1 = new Thread1 (in);
If the lock object is a map above, you can modify the success Thread2 thread2 = new Thread2 (in);
New Thread (Thread1). Start ();
New Thread (
Prevent departing employees from taking customers away, prevent internal employees from leaking data, and prevent Huawei employees from leaking data.
Preventing leaks of departing employees and internal employees is an important aspect of enterprise management. In particular, with the popularization of Enterprise Information Technology, employees' daily work is c
A: Hanging horse prevention measures: 1, the user is advised to upload and maintain the Web page through FTP, try not to install the ASP upload program. 2, the ASP upload program calls must be authenticated, and only allow trusted people to use the upload program. This includes a variety of news releases, mall and forum procedures, as long as the ASP can upload files to be authenticated! 3, the ASP program Administrator user name and password to have a certain complexity, not too simple, but als
How to prevent the next heartbleed Vulnerability
I. Introduction
Open SSL-based heartbleed vulnerability is considered a serious problem of CVE-2014-0160, OpenSSL is widely used in SSL and TLS plug-ins. This article explains how the heartbleed vulnerability was exploited.
This article describes specialized tools and techniques for preventing heartbleed and similar vulnerabilities. First, I used a simple test to analyze why many tools and technologies
Explanation of PHP methods to prevent leeching and thunder downloads; explanation of php methods to prevent thunder
Preventing leeching:
Principle: when the server asks us to download the file, we will get a link. Then we can find the file through this link and download it. That is to say, this link must be available. How can we prevent leeching? That is, the lin
Php emergency code to prevent website attacks, php to prevent emergency code. Php emergency code to prevent websites from being attacked. php has recently prevented a website from being attacked and the database has been flushed away. Fortunately, there is a database backup on the customer's machine. In case of such strict php emergency code to
How to Prevent SQL Injection Analysis in PHP and prevent SQL Injection in php
This article describes how to prevent SQL Injection in PHP. Share it with you for your reference. The specific analysis is as follows:
I. Problem description:
If the data entered by the user is inserted into an SQL query statement without being processed, the application may be vulnerab
Presumably, many VM users have experienced web page tampering and data deletion,In addition to suffering from such behavior, many customers suffer from ineffective preventive measures.
In view of the fact that most website intrusions are completed by using asp Trojans, our company will close up this article so that common VM users can better understand and prevent asp Trojans. Only by taking preventive measures jointly between the space provider and t
Web page Quick malicious refresh, CC attack is an attacker to generate a proxy server to target the legitimate request, analog multi-user Non-stop access to the site, especially those who need a large number of data operations require a large number of cup time of the page, resulting in the target Web server resources exhausted, until the downtime crashes, In this way, resulting in the waste of server resources, CPU for a long time in 100%, always have to deal with the connection until the netwo
Some irrelevant data, was taken off the library what, there is nothing, but some of the more important data is taken off the library, although there may be no serious loss, but will be very ashamed of the same, was burst off the library of what, will always be more embarrassing, to tell the truth is also quite embarrassing, can be more defensive, there are loopholes in the shortcomings ofIn order to prevent unnecessary trouble, we can use out-of-the-b
How to Prevent Automatic Win10 upgrade and Prevent Automatic win10 upgrade
Now Microsoft has released an official method to prevent auto-upgrade of the Win10 system. The specific procedure is as follows: Please come and check out my experience.
Here, we first use the Group Policy Editor to modify, press the Windows logo key + R key on the desktop, open the Run
Summary of five methods to effectively prevent SQL injection, and 5 methods to effectively prevent SQL Injection
SQL Injection
SQL injection is a type of attack that causes great harm. Although the attack is very harmful, the defense is far from as difficult as XSS.
The cause of the SQL injection vulnerability is splicing SQL parameters. That is, directly concatenate the query parameters used for input into
The computer re-installed sqlserver2008 R2 (English), New data table, new field, found that there is a field type set wrong, want to modify the field type, and the table has been saved, that is, after saving to modify the field properties. However, the modified settings cannot be saved, prompting "saving changes is not permitted" (specifically)Workaround:Find the Tools->options in the menu bar, find the designers, and then prevent saving changes that
Database firewall onefirewall, how to prevent the hacker physical deletion? Prevent Ctrip from happening againFirst explain the database firewall principle (white list mechanism): Similar to 360 mobile phone defender, pre-defined address book, others call you, only in the Address Book phone can answer, no direct rejection in the Address book.The database is usually the focus of sensitive information, but al
Prevent harassment settings We usually say the ad phone, or some harassing phone, specifically we prevent harassing phone as an example.
1. Enter "Application" under Samsung A3 interface.
2. Click "Set".
3. Here we click on the "Call/information blocking" option, open into the details below.
4. Click "Call Stop" first, because we want to open it, the default is of
As email is increasingly becoming an important means of daily communication, the shadow of viruses begins to surround emails. Today, more than of computer viruses are transmitted by email. So how can we comprehensively intercept email viruses?
You can usually use the following measures:
1. prohibit other programs from secretly sending emails
In order to prevent the email virus from automatically querying the user's address book, and then sending it to
Prevent logon pages from appearing in frames and prevent logon to Frames
When using the nested frame page for development, the logon page appears on the frame page when the server is restarted,
Therefore, you need to use js to determine the current address information on the logon page, and then jump to the separate logon page.
The js Code is as follows:
$ ("Document"). ready (function () {//
Because of different systems, the path information is different, but the final processing is in the same format,For example: The input path is: D:\\kassdev\\app-kaace\\classes\\com\\kass\\commons\\utils,The path information required for the output is: d:/kassdev/app-kaace/classes/com/kass/commons/utilsThe following code, which deals with this situationpublic static string Parsepath (final String path) {if (Path==null | | path.length () ==0)Return "";if (path.indexof ("\ \") >=0) {String path2 =
How does android prevent code decompilation and android prevent decompilation?
As an Android app developer, you have to face an embarrassing situation: applications that have worked hard to develop can be decompiled easily by others.
Google also seems to have discovered this problem. From SDK2.3, we can see that there is a proguard folder under android-sdk-windows \ tools \.
Proguard is a java code obfuscat
Found the bug of self-built form: (there are three data blocks, one header, two rows, and three sub-rows)
Operation: Enter the second data block and press Ctrl + F11 to query the tax invoice.
Solution:
1. You can try to Disable Ctrl + F11. I don't know how to do this...
2. Set the relationship between data block 1 and data block 2. One of the properties is to prevent operation without a master record. Select "yes" to solve this problem.
3
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