how to become good java developer

Tags: blog http ar using Java on log HTML EFReasonThe Oracle SQL Developer installed in Oracle 11g is 32-bit, and the java.exe we are assigning to him now is 64 bits, so this error can occur.Workaround1) Download Oracle SQL Developer x64 from the web and replace the original directory: D:\app\oracle\product\11.1.0\db_1\sqldeveloper 32-bit Oracle SQL

1. What is a Java virtual machine? Why is Java called a "platform-agnostic programming language"?A Java Virtual machine is a virtual machine process that can execute Java bytecode. The Java source file is compiled into a bytecode file that can be executed by the

Java developer interview points ZZ Java developer interview highlights I. Basic Java knowledge 1. What are the differences between the basic data types in Java and whether the string type is the basic data type. 2. String operatio

. 10.Instance of Java Instance of Java is a very popular web site for online learning java. The site covers the most popular Java programming concepts, including Java basic concepts, object-oriented concepts, arrays, exception handling,

1. Environment Win7 x64, Oracle 11g R2, jdk6 x642. Problem When Oracle SQL statement is started for the first time, we will enter the java.exeexample. I found java.exe In the bind in the jdkinstallation directory, but the following error will be reported after entering the content: 3. Cause The Oracle SQL statement installed in Oracle 11g is 32-bit, but the java. EXE we have specified is 64-bit, so this error occurs.4. Solution 1) download Oracle

1.Volatile and synchronized different points(1), volatile can only be used for variables, the use of a small range. Synchronized can be used in variables, methods, classes, synchronous code blocks, etc., the scope of use is relatively wide.(2), volatile can only guarantee visibility and order, can not guarantee atomicity. The visibility, order and atomicity of synchronized can be certified.(3), volatile does not cause thread blocking. Synchronized may cause thread blocking.Atomicity, visibility,

using administrator20. View Port Usagenetstat -tln | grep 8080Viewing usage of port 808021. See which program the port belongs tolsof -i :808022. View the processps aux|grep javaView Java processesps auxView All Processes23. List the contents of the directory in a tree viewtree aPs:mac using the tree command24. File downloadwget http://file.tgzInstall wget command under Maccurl http://file.tgz25. Network detectionping www.taobao.com26. Telnetssh [ema

, this approach cannot be extended to a large number of classes, because each class needs to write its own XML generation code specifically. On the plus side, this is a simple way to do it, without additional configuration spending or more complex construction process spending, and any JavaBean graph can become an XML document with just a few calls.I have concatenated XML tag strings to implement the ToXml () method. As I mentioned last time, this is

doesn't have to be knocked, and Hello world comes out. I should have got started.Self-pleased ....Oh, yes. Not the same as the tutorial.Go on.This time it's ready. Well. Go on.: http://maven.apache.org/download.cgiThe translation is very useful, Anxi.Horizontal slots. My colleague suddenly told me. MAVEN integrates it. Tried it.Continue to the next step.These are created using Eclipse to create a MAVEN project.Go on...Then I'll try to do the maven command in VS code.MVN CompileCross-platform?

to Baidu slightly.Anyway Baidu down all the way. It's almost over.I can finally open it. The way to start learning.Then I set up a few projects, what ghosts, all can not run up.Uh's MAVEN project, this should be the focus of my study.Start by planning what you learn.I want to create a DDD (domain-driven design) Java project,The IOC framework must be used,I also like BDD (cucumbers are best used.) ) Agile development Model. Be interested in learning:

At the end of the year, the main write Java has been more than half a year. During this half-year period, I learned to use Spring-boot, learned SQL, and learned to use MongoDB. At first glance, the content of my work seems to be mostly "back-end", so can I calculate a half back-end development? I don't think so.Yes, I started working on Java and databases in the last six months, but my job is essentially "d

The IBM Developer Kit for the Java platform version 5.0 marks significant progress, with significant improvements in language features and low-level execution techniques. This article is the first in a 5-part article series that outlines some of the major changes and improvements IBM has made to its virtual machine technology, including traditional garbage collection, shared class data, and improvements in

index.jsp Main code: Open the Editor_config.js configuration file Configure path var URL = window. Ueditor_home_url | | "/ueditor03/ueditor/"; Here ueditor03 is the name of the individual project Note that the reference in the INDEX.JSP code and the code in the body, because the ueditor version of the different, to do the corresponding modification, the specific situation of specific analysis. You can publish the running project to this, the browser can be used in the e

Java1. Give, write a method to decide if one are a permutation of the other.For example:string s1= "dog" string s2= "God" is true; String s3= "Dgo" is also true; Public Booleanispermutation (String s1,string s2) {Booleanflag=false; if(S1.length () ==0 s1.length ()! =s2.length ()) {Flag=false; }Else{String str1=NewString (S1); String str2=NewString (S2); Char[] str1tochar=S1.tochararray (); Char[] str2tochar=S2.tochararray (); Arrays.sort (Str1tochar); Arrays.sort (Str2t