intellij tutorial java

Reason: Unknown, may be caused by the upgrade idea, previously played an upgrade patch;Error message:Information:java:javacTask: Source release 1.8 requires target release 1.8INFORMATION:2017/1/24 11:27-compilation completed with 1 error and 0 warnings in 5s 873msInformation:java:Errors occurred while compiling module ' java-lessions 'Information:javac 1.8.0_91 was used to compile Java sourcesInformation:mo

IntelliJ idea to run your first Java applicationCreate a project let's create a simple Java Hello World project.Click Create a new project.Open the New Project Wizard.The main item you should pay attention to is the SDK. The SDK (software Development Kit) is a set of software development tools that allow you to develop applications faster.

As the IDE for Java development, Eclipse has been around for several years now, with its rich features, ease of operation, and the popularity of developers in improving productivity. Of course, when it comes to the Java IDE, one cannot help mentioning other Java ides like Netbeans,intellij, so what are the similarities

The previous article describes the configuration of the development environment and the installation of the IDE, and this article describes how to develop a simple webapp from scratch. Note: All the steps have screenshots, and has been marked red in the screenshot, you can also directly follow the screenshot to operate. First, create a Web project (1) Open IntelliJ idea and click "Create New Project": (2) First select "

packaged into a war package, and is file-expandable, the output path is the current project Out folder, leave the default. Also tick "Build on Make", indicating that the compile time package deployment, tick "show content of elements", indicating the display of a detailed list of content." Reference ":Intellij the difference between facets and artifacts in idea 14.xThe role and difference of Java's packaged jar, war, ear packageIntellij the differenc

IntelliJ idea 12 Creating a maven-managed Java Web project (plot)http://blog.csdn.net/zht666/article/details/8673609The main use of this article is to illustrate the process of creating a Maven managed Java Web Project using Intellijidea 12.This document is PDF : http://download.csdn.net/detail/zht666/51412351. New project, select Maven Module, enter the project

First, import1. Java project before the jar package is imported,2. Click File--Project Structure (shortcut CTRL + ALT + Shift + s), click "Modules" on the left side of the project Structure interface3, in the "Dependencies" tab screen, click on the right Green "+" number, select the first option "JARs or directories ...", select the appropriate jar package, click "OK", the jar package added successfully4, point "OK" back to the project interface,

This article describes the resolution process for job recalculation when submitting jobs in CentOS 6.5 to Hadoop 1.2.1 encountered Error:java heap space errors in the reduce phase. Workaround for Linux, Mac os X, and Windows operating systems.Environment: Mac OS X 10.9.5, IntelliJ idea 13.1.4, Hadoop 1.2.1Hadoop is placed in a virtual machine, and the host is connected via SSH, IDE and data files on the host. Idea itself runs on JDK 1.8,idea engineeri

Prepare for Work 1: Create a new first Javaweb projectPreparation 2: New moduleStep5 Configure Deployment for all projects 5.15.2 "+" "Artifact" 5.3 After selecting all the contents listed here, click "OK"5.4 selected This, indicating that the three Java EE projects will be automatically published to the application context path after Tomcat is started . 5.5 Set Application context for each Web project"WebWorkSpace1"-"/" = = = " http:localhost:port

", indicating the display of a detailed list of content." Reference ":Intellij the difference between facets and artifacts in idea 14.xThe role and difference of Java's packaged jar, war, ear packageIntellij the difference between compile, make and build in the Idea 14.x menu itemIi. Configuring Tomcat1, run, Edit configurations, go to "Run Configurations" window2. Create a new Tomcat container by clicking "+", "Tomcat Server," Local3. Enter a new ser

If you compile a Scala project, you encounter the following exception:Can't expand macros compiled by previous versions of ScalaIt is possible that the Scala version of the project is inconsistent with the version of the dependent package, which requires that the project version be adjusted to the same version as the dependent package, the following is the solution:1. Select the project and select Project Structure from file as follows:Or simply click on the "Project Structure" icon in the upper

elements", indicating the display of a detailed list of content." Reference ":Intellij the difference between facets and artifacts in idea 14.xThe role and difference of Java's packaged jar, war, ear packageIntellij the difference between compile, make and build in the Idea 14.x menu itemIi. Configuring Tomcat1,Run, Edit configurations, go to "Run Configurations" window2. Create a new Tomcat container by clicking "+", " Tomcat Server ," Local3. Enter

Digression: Initially very reluctant to write this no technical content of the blog, but online for fedora21 under the whole environment of the construction process of the article is very few, then I break an example:-P(i) Download of JDK and setting of environment variableIf you have no desire for the JDK version, then congratulations, you can get it directly from the FEDORA21 built-in software library. JDK 567 with your choice (except JDK8) or you can use the following commands directly:sudo

=internal , without this parameter, will be very slow when Maven builds the skeleton, and sometimes it will get stuck directly.Explanations from the Internet: Archetypecatalog represents the plug-in uses the archetype metadata, does not add this parameter when the default is Remote,local, that is, the central warehouse archetype metadata, because the central warehouse archetype too much, so the result is very slow, Specify internal to indicate that only internal metadata is used. N

Maven builds the skeleton, and sometimes it will get stuck directly.Explanations from the Internet: Archetypecatalog represents the plug-in uses the archetype metadata, does not add this parameter when the default is Remote,local, that is, the central warehouse archetype metadata, because the central warehouse archetype too much, so the result is very slow, Specify internal to indicate that only internal metadata is used. Next, fill in the project name and module name.Click Finish

In IntelliJ idea 14.1, JDK is not configured in java Maven. idea14.1maven When using Maven in IntelliJ IDEA 14.1 in java projects, IDEA sets the default build version and source code version to jdk5. In IDEA, the Language level uses the default JDK 5 level. The target version is JDK5 by default. When you manually cha

Maven builds the skeleton, and sometimes it will get stuck directly.Explanations from the Internet: Archetypecatalog represents the plug-in uses the archetype metadata, does not add this parameter when the default is Remote,local, that is, the central warehouse archetype metadata, because the central warehouse archetype too much, so the result is very slow, Specify internal to indicate that only internal metadata is used. Next, fill in the project name and module name.Click Finish

1. Download mavenOfficial address: http://maven.apache.org/download.cgiUnzip and create a new local warehouse folder2. Configure the local warehouse path3. Configure MAVEN Environment variables4. Configuring Maven in IntelliJ IdeaOpen-file-settings5. Create a new MAVEN Web projectOpen-file-new-projectClick NextGroupID and artifactidClick NextThe added configuration is archetypecatalog=internalClick NextClick NextAfter clicking Finish, the project star

1. Download and complete the required Javacsv.jar package beforehand.The Java project is displayed before the jar package is imported, as shown in2. Click File--Project Structure (shortcut CTRL + ALT + Shift + s) and click on the "Modules" display interface on the left side of the project Structure interface.3. In the "Dependencies" tab screen, click on the right green "+" sign, select the first option "JARs or directories ...", select the appropriate

This blog post reference http://blog.csdn.net/qq_27093465/article/details/63683873, less go a lot of detours, hereby thankEnvironment:1,jdk1.8,2,maven3,3,TOMCAT8,4,idea2017.First create a MAVEN HelloWorld project, where Pom files and so on may be red, I do not control directly.Add a new model (here because iOS and Windows are no different, not yourself)just point to the next stepAfter project creation is completeEstimated some small partners to this place, hey, found that I have only one option,