java debugger tool

Tags: upd dstat void jdb Java Tool class successful cat code offJdbcutils class: 1. Create a private property * (four variables necessary to connect to the database): Dreiver URL user password 2. Privatize the constructor 3. Write the registration drive to a static block of code 4. The outside world can only get the database connection by invoking the static method of the

1. dateutil. Java, the code is as follows:1 Packagecn.itcast_04;2 3 Importjava.text.ParseException;4 ImportJava.text.SimpleDateFormat;5 Importjava.util.Date;6 7 /**8 * This is the tool class for converting dates and strings to each other9 * Ten * @authorWind One */ A Public classDateutil { - PrivateDateutil () { - } the - /** - * The function of this method is to turn the date into a strin

final Objectmapper MAPPER = new Objectmapper (); /** * Converts an object to a JSON string. */public static string Objecttojson (Object data) {try {string string = Mapper.writevalueasstring (d ATA); return string; } catch (Jsonprocessingexception e) {e.printstacktrace (); } return null; /** * Convert JSON result set to Object */public static Modified Controller@Controllerpublic class Picturecontroller { @Autowired pictureservice pictureservice; @R

-dump:file=test.bin PID3. Analysis dump heap file, can use Jhat:Jhat Test.binAfter the analysis is complete, you can view the heap in a browser. The results of this tool are relatively primitive, you can also use the Eclipse Mat plugin for graphical analysis, or IBM's heap Analyzer.4.JVISUALVM and JCONSOLE:JVM with the performance analysis and monitoring tools, how to use? Please read the documentation yourself.5.jstack: Analyze the thread stack, asJs

Original: Java HTML string Regular expression using the tool classCode: http://www.zuidaima.com/share/1550463453416448.htmHTML-related Regular expression tool classes include filtering HTML tags, converting HTML tags, replacing specific HTML tags Package Com.zuidaima.common.util;import Java.util.regex.Matcher; Import Java.util.regex.Pattern; /** *

Java concurrency: synchronization between threads-conditional queue and synchronization Tool Synchronization between threads exists in addition to mutex (the mutex lock introduced earlier). Below we will introduce some common collaboration methods between java threads.I. built-in condition queue Just as each Java Objec

The jasypt development team has released the Java encryption tool jasypt 1.4, which can be integrated with Spring framework, hibernate, and acegi security. A project-related developer said that jasypt is a Java library that allows developers to add basic encryption functions to Java projects without having to know the

Jprotector High-Strength Java application Encryption tool Encryption techniques for Java applications are now prevalent in two types of cryptography: Code obfuscation encryption: Through the source code for the shape confusion, control confusion, data obfuscation and other processing, increased the class file after the anti-compilation of the source code analysi

Examples of some usage of the StringUtils tool class in Java This article mainly introduces some usage examples of StringUtils tool class in Java. This article focuses on the use of isEmpty and isBlank methods, as well as the use of trim, strip, and other methods, for more information, see The operation object of the S

supported, the interruptedexception is thrown and the current thread's interrupted state is cleared.1.3. Read-write lockIn addition to adding the lock interface, Java 5 also adds the Readwritelock interface, the read-write lock, which is defined as follows:Public interface Readwritelock { Lock readlock (); Lock Writelock ();}A read-write lock allows multiple read threads to execute concurrently, but does not allow the write thread to execute co

Original: Java read XML file generic tool class (recursive call) source code download address: http://www.zuidaima.com/share/1550463285480448.htm The Java implementation reads the XML file and gets all the text content under the specified name node, including the node (inverse) Package com.zuidaima.xml; Import Java.io.FileInputStream; Import java.io.FileNotFoun

JconsoleStarts a graphical console that lets you monitor and manage Java applications.SynopsisJconsole [ Options ] [Connection ...]Options The command-line options. See Options. Connection = PID |Host:port | Jmxurl The pid value is the process ID of a local Java Virtual machine (JVM). The JVM must is running with the same user ID as the user ID running the jcons

This seat has previously published an articleArticle: Log cutting and cleaning tools implemented in Java are heavily reproduced on the Network (although most of them do not indicate the source of the original article ^_^ ). There are a lot of official comments to this seat, hoping to provide toolsSource code. Therefore, this seat does not dare to copy itself, and now the sourceCodeShare it for your study and exchange. If you have less time, please ste

Factors to consider:1. A simple convention is better than the configuration of the same Name property copy2. Nested Properties Copy3.flattern (flat) support, to support the N-layer structure of the copy to a layer of structure.4. PerformanceHere's a page that mentions a lot of tools.Http://stackoverflow.com/questions/1432764/any-tool-for-java-object-to-object-mappingNote that many tools use static

Java concurrency and multithreading 4: Use the universal synchronization tool CountDownLatch to implement thread waitingCountDownLatch, a synchronization helper class that allows one or more threads to wait until a group of operations are being performed in another thread.Initialize CountDownLatch with the given count. Because the countDown () method is called, The await method will be blocked until the cur

1. Use of the Aslist () method in the Arrays tool class1 Public static arrays into setsPrecautions:Although you can turn an array into a collection, the length of the collection cannot be changed .2. code example:(1)1 Packagecn.itcast_03;2 3 Importjava.util.Arrays;4 Importjava.util.List;5 6 /*7 * public static 8 * 9 * Precautions:Ten * Although you can turn an array into a collection, the length of the collection cannot be changed. One */ A Publ

One, Java SDK installationJ2SE latest version of installation address: http://www.oracle.com/technetwork/java/javase/downloads/index.html, including JDK and JRE.After installation, cmd-->java-version, can see the current Java platform version number;Configure environment variables (System variables):Java_home = D:\Prog

Java reflection Tool Mport java. lang. reflect. array; import java. lang. reflect. constructor; import java. lang. reflect. field; import java. lang. reflect. invocationTargetException; import

We will introduce you to an open-source tool astyle, which supports C/C ++, C #, Java, and other languages and is formatted according to different styles.Code, Also known as beautification code.The Code formatted with this tool is almost the same as my own style. I like this tool very much and can easily integrate it i

the impersonation method callMockito.when (mockedlist.get (0)). Toreturn ("first");Mockito.when (Mockedlist.get (1)). Tothrow (New RuntimeException ());Print out "First"System.out.println (mockedlist.get (0));Throws Exception System.out.println (Mockedlist.get (1));Returns NULL because the return value has not yet been simulatedSystem.out.println (Mockedlist.get (999));3. Parameter matching deviceUse Anyint () to match any int type parameter Mockito.when (Mockedlist.get (Anyint ())). Toreturn (