java debugging practice

Java beginner course video practice-Beginner online, quiz game, ATM practice, welcome to watch, atm practice Java introductory course video practice-elementary The upload is complete. Welcome to the audience Go directly: Htt

10 debugging skills that Java programmers should know and java programmer debugging skills The test can help identify and solve application defects. In this article, the author will use Eclipse, a common development tool, to debug Java applications. However, the

In the Android application development, we will use a variety of code debugging; In fact, after the development of Android, we may encounter some random problems, such as high CPU, memory leaks and so on, we can not easily debug the code, we need a system log, etc., Below I grasp the work encountered several commonly used commands and methods for everyone to demonstrate practice. 1.logcat commandThis comma

In Android application development, we will use various types of code debugging. In fact, after Android development, we may encounter some random problems, such as high cpu and memory leakage, we cannot perform simple code debugging. We need a system log and so on. Below I will explain some common commands and methods I have encountered in my work. 1. logcat commandThis command is the simplest and most comm

In this tutorial, we will see debugging Java applications using eclipse. Debugging helps us identify and solve defects in applications. We will focus on the running time, rather than the compile-time error. A command line debugger like GDB is provided. In this tutorial, we will focus on Gui-based debugging. We will run

Tags: gdb bufferThe starting address of the buffer, that is, the starting address of the variable buffer is: 0xbfffefd0function foo return address is: 0XBFFFEFFCSo the distance between the buffer start address and the function foo return address is:0xbfffeffc-0xbfffefd0 =1c = 28 bytesThe following is the complete debugging process:From here you can see the value of the Lbuffer variableGDB Debugging

In the previous blog "acegi security form-based authentication-debug debugging", we described a phenomenon that the previous page is retained every time a new browser is opened. For the previous example, either the current user information or the permission information is not available. This occurs. We have analyzed this in the previous blog, that is, there are already authenticated permission objects in securitycontext.So, I want to re-run the userin

Java course practice log (Thursday) and java practice log Import java. awt. eventQueue; import javax. imageio. imageIO; import javax. swing. JFrame; import javax. swing. JPanel; import javax. swing. border. emptyBorder; import javax. swing. abstractButton; import javax. swin

[JAVA concurrent programming practice] 3. Synchronization container and java practice The synchronization containers include Vector and Hashtable, and some are created by factory methods such as Collections. synchronizedXxx. 1. Synchronization container Problems Synchronization containers are thread-safe, but sometim

[JAVA concurrent programming practice] 10. concurrent program testing and java practice1. Generate a random number Package cn. study. concurrency. ch12; public class Util {public static int xorShift (int y) {// shift left and unsigned right, and last XOR operation (XOR, if the two bits are different, the value is 1; otherwise, the value is 0) y ^ = (y 2. cache

[JAVA concurrent programming practice] 8. Lock sequence deadlock and java practice Package cn. study. concurrency. ch10; public class Account {private String staffAccount; // Account private String passWord; // passWord private int balance; // Account balance public Account (int money) {this. balance = money;} public S

[JAVA concurrent programming practice] 11. Implementation of bounded cache and java practice1. bounded cache base class Package cn. xf. cp. ch14;/*** function: bounded cache implementation base class * Time: 2:20:00 * file: BaseBoundedBuffer. java * @ author Administrator ** @ param 2. Determine the prerequisites befo

[JAVA concurrent programming practice] 9. Lock segmentation and java practice Package cn. study. concurrency. ch11;/*** lock segmentation * @ author xiaof **/public class StripedMap {// synchronization policy: locks the array in segments, n nodes use the n % LOCKS lock to protect private static final int N_LOCKS = 16;

then back to look at the above. Let me give you a small example of how to debug remotely. Environment: Tomcat,eclipse, do not need any plugins for remote debugging. Of course, you can use MyEclipse to deploy Web applications to Tomcat, note that only deployment, in general, using remote debugging does not need to configure the MyEclipse Web server, MyEclipse here only a copy file role, Fortunately now myec

This blog is suitable: * Use eclipse + ADT to develop the coder of the android Project * The coder that knows and uses build path * Coder for which you want to write test code JUnit debugs and tests the Java project. In Android development, it also has its own testing framework. However, there are not many projects, at least I do! The following describes a simple and direct debugging method. 1. Create an

In the Java Web development process, especially in the background development often need to see the browser debugging network items: Today in the development of online preview system using the Flexpaper plug-in, This plugin will call flexpaperviewer.swf this software (let's say so), this software processing is. swf file,The content-type that should be configured in the Tomcat Web. xml file is Application/x-

Original Blog Address: http://blog.csdn.net/dfdsggdgg/article/details/507303111.center, add the following statement to the first line of the startup.sh fileDeclare-x catalina_opts= "-server-xdebug-xnoagent-djava.compiler=none-xrunjdwp:transport=dt_socket,server=y, suspend=n,address=8000 "(Do not wrap, to be on the same line)Under Ubuntu, add the following statement to the first line of the catalina.sh file catalina_opts= "-xdebug-xrunjdwp:transport=dt_socket,address=8000,server=y, Suspend=n "(Do

].substring (2)) *0.0001+this.getpoint ( Pukes[1].substring (2)) *0.000001+this.getpoint (pukes[0].substring (2)) *0.00000001;}Return This.getpoint (pukes[4].substring (2)) *0.01+this.getpoint (pukes[3].substring (2)) *0.0001+this.getpoint ( Pukes[2].substring (2)) *0.000001+this.getpoint (pukes[1].substring (2)) *0.00000001+this.getpoint (Pukes[0]. SUBSTRING (2)) *0.0000000001;}public void init () {while (true) {This.createpuke ();This.sortedpuke ();This.createplayer ();if (flag) {This.showpuke

) {System.out.println ("Driver load Failed"); E.printstacktrace (); }//2 connect String URL = "Jdbc:mysql://localhost/test?use analysis: Ssl=true"; String user = "root"; String password = "root"; try {con = drivermanager.getconnection (url, user, password); System.out.println ("link succeeded"); } catch (SQLException e) {System.out.println ("link failed"); E.printstacktrace (); }//3 Statement object try {sql = con.creates

As described in the summary, the frequent need to deploy the program to the test machine at the time of the tune-up, it is inconvenient to debug. The previous practice is to print information in the program to track, but this method is very limited, because often can not be located in the problem at once, need to constantly modify the program to print the statement, constantly restart the application, which takes a lot of time and effort. Therefore, i